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Cisco 7800 Series Administration Manual
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Cisco 7800 Series Administration Manual

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Cisco IP Phone 7800 Series for Third-Party Call Control Administration
Guide
First Published: January 29, 2016
Americas Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 527-0883

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Summary of Contents for Cisco 7800 Series

  • Page 1 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide First Published: January 29, 2016 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 527-0883...
  • Page 2 Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.
  • Page 3 Cisco IP Phone 7811 Phone Connections Cisco IP Phone 7821 Phone Connections Cisco IP Phone 7841 Phone Connections Cisco IP Phone 7861 Phone Connections Buttons and Hardware Terminology Differences Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 4 Port ID TLV Time to Live TLV End of LLDPDU TLV Port Description TLV System Name TLV System Capabilities TLV Management Address TLV System Description TLV IEEE 802.3 MAC/PHY Configuration/Status TLV Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 5 RTP Packet Contents Configure the SDP Payload Types Configure the SIP Settings for Extensions Configure the SIP Proxy Server Configure the Subscriber Information Parameters Managing NAT Transversal with Phones Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 6 Dictionary Server Script Localization Configuration Example Cisco IP Phone 7800 Series Documentation Third-Party Call Control Setup C H A P T E R 4 Determine the Phone MAC Address Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 7 P A R T I V Cisco IP Phone Security C H A P T E R 7 Security Features Domain and Internet Setting Configure Restricted Access Domains Configure the Internet Connection Type Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 8 Phone Features and Setup C H A P T E R 9 Phone Features and Setup Overview Cisco IP Phone User Support Telephony Features for Cisco IP Phone Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide viii...
  • Page 9 Call Statistics Fields Cisco IP Phone Web Page Info System Status System Information Reboot History Product Information Phone Status Call Status Ext Status Line 1 Status/Call 2 Status Download Status Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 10 SIP Timer Values Response Status Code Handling RTP Parameters SDP Payload Types NAT Support Parameters Provisioning Configuration Profile Firmware Upgrade CA Settings General Purpose Parameters Regional Control Timer Values (sec) Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 11 Share Line Appearance Call Forward NAT Settings SIP Settings Call Feature Settings Supplementary Services Proxy and Registration Subscriber Information Audio Configuration Dial Plan Attendant Console Call Parking Call History Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 12 C H A P T E R 1 3 Basic Reset Perform Factory Reset Phone Keypad Perform Factory Reset from Phone Menu Voice Quality Monitoring Voice Quality Troubleshooting Tips Cisco IP Phone Cleaning Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 13 Reboot History on the Phone Web User Interface Reboot History on the Cisco IP Phone Screen Reboot History in the Status Dump File Phone Behavior During Times of Network Congestion Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide xiii...
  • Page 14 Contents Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 15 P A R T About the Cisco IP Phone • Technical Details, page 3 • Cisco IP Phone Hardware, page 13...
  • Page 17 (Voice-over-Internet Protocol) phones that provide voice communication over an IP network. They provide all the features of traditional business phones, such as call forwarding, redialing, speed dialing, transferring calls, and conference calling. The Cisco IP Phone 7800 Series is targeted for solutions that are centered on Third-Party SIP-based IP PBX.
  • Page 18 Distance Requirements As supported by the Ethernet Specification, it is assumed that the maximum cable length between each Cisco IP Phone and the switch is 100 meters (330 feet). Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 19 • The network port is the 10/100 SW port; the Cisco IP Phone 7841 has a 10/100/1000 SW network port. • The computer (access) port is the 10/100 PC port; the Cisco IP Phone 7841 has a 10/100/1000 PC computer port.
  • Page 20 BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and Data D respectively. Phone Power Requirements The Cisco IP Phone can be powered with external power or with Power over Ethernet (PoE). A separate power supply provides external power. The switch can provide PoE through the phone Ethernet cable. Note When you install a phone that is powered with external power, connect the power supply to the phone and to a power outlet before you connect the Ethernet cable to the phone.
  • Page 21 Supported Network Protocols Cisco IP Phones support several industry-standard and Cisco network protocols that are required for voice communication. The following table provides an overview of the network protocols that the phones support. Table 5: Supported Network Protocols on the Cisco IP Phone...
  • Page 22 LLDP is a standardized network The Cisco IP Phone supports LLDP Protocol (LLDP) discovery protocol (similar to CDP) that on the PC port. is supported on some Cisco and third-party devices. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 23 RTP and Real-Time Control Protocol (RTCP) packets providing authentication, integrity, and encryption of media packets between two endpoints. Transmission Control TCP is a connection-oriented transport — Protocol (TCP) protocol. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 24 VLANs for carrying: • Voice traffic to and from the IP phone (auxiliary VLAN on the Cisco Catalyst 6000 series, for example) • Data traffic to and from the PC that connects to the switch through the computer (access) port of the IP...
  • Page 25 Cisco cannot guarantee the performance of external devices, cables, and connectors. In European Union countries, use only external speakers, microphones, and headsets that are fully compliant Caution with the EMC Directive [89/336/EC]. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 26 External Devices Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 27 The Cisco IP Phones have the following features: • Programmable line keys supports up to 16 lines (Cisco IP Phone 7821 supports 2 lines, Cisco IP Phone 7841 supports 4 lines, and Cisco IP Phone 7861 supports 16 lines) or that can be programmed for other features.
  • Page 28 Cisco IP Phone 7811 Use of a cell, mobile, or GSM phone, or two-way radio in close proximity to a Cisco IP Phone might Caution cause interference. For more information, see the manufacturer documentation of the interfering device. Cisco IP Phones provide traditional telephony functionality, such as call forwarding and transferring, redialing, speed dialing, conference calling, and voice messaging system access.
  • Page 29 Phone Connections Connect your Cisco IP phone to your LAN with an Ethernet cable to enable full functionality of your Cisco IP phone. If your Ethernet port is equipped with Power over Ethernet (PoE), you can power the Cisco IP phone through the LAN port.
  • Page 30 Phone Connections Connect your Cisco IP phone to your LAN with an Ethernet cable to enable full functionality of your Cisco IP phone. If your Ethernet port is equipped with Power over Ethernet (PoE), you can power the Cisco IP phone through the LAN port.
  • Page 31 Phone Connections Connect your Cisco IP phone to your LAN with an Ethernet cable to enable full functionality of your Cisco IP phone. If your Ethernet port is equipped with Power over Ethernet (PoE), you can power the Cisco IP phone through the LAN port.
  • Page 32 The Cisco IP Phone 7800 Series has distinct hardware types: • Cisco IP Phone 7811—No buttons on either side of the screen • Cisco IP Phone 7821—Two buttons on the left side of the screen • Cisco IP Phone 7841—Two buttons on either side of the screen •...
  • Page 33 Hold/Resume, —Place an active call on hold and resume the held Hold/Resume Conference, and Transfer call. —Create a conference call. Conference —Transfer a call. Transfer Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 34 Terminology Differences The following table highlights some of the terminology differences in the Cisco IP Phone 7800 Series for Third-Party Call Control User Guide and the Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 35 P A R T Cisco IP Phone Installation • Cisco IP Phone Installation, page 23 • Third-Party Call Control Setup, page 61...
  • Page 37 The phone displays the date and time from Third-Party Call Control. The time displayed on the phone Note can differ from the Third-Party Call Control time by up to 10 seconds. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 38 Phone Power Requirements, on page Step 2 Connect the handset to the handset port. The wideband-capable handset is designed especially for use with a Cisco IP Phone. The handset includes a light strip that indicates incoming calls and waiting voice messages. Step 3 Connect a headset to the headset port.
  • Page 39 Step 5 Connect a straight-through Ethernet cable from the switch to the network port labeled 10/100 SW on the Cisco IP Phone (10/100/1000 SW on Cisco IP Phone 7841). Each Cisco IP Phone ships with one Ethernet cable in the box.
  • Page 40 This softkey deletes the character to the left of the cursor. • Press Revert before pressing Apply to discard any changes that you made. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 41 Configure Network Settings • To enter a period (for example, in an IP address), press * on the keypad. Note The Cisco IP Phone provides several methods to reset or restore option settings, if necessary. Related Topics Basic Reset, on page 179...
  • Page 42 Select Admin Settings. Step 3 Select Network Setup. Step 4 Scroll to PC Port Setup option and press Edit. Step 5 Scroll to the setting that you want and press Select. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 43 Press Validate, and then press Apply to apply the changes; or press Revert to discard the changes. What to Do Next You must set the Subnet Mask Field and the Gateway. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 44 Press Validate, and then press Apply to apply the changes; or press Revert to discard the changes. Step 7 If multiple DNS Servers can be configured, repeat Steps 5 and 6 as needed to assign backup DNS servers. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 45 The only choices are G711a and G711u. Negotiation of the optimal voice codec sometimes depends on the ability of the Cisco IP Phone to match a codec name with the far-end device or gateway codec name. The phone allows the network administrator to individually name the various codecs that are supported such that the correct codec successfully negotiates with the far-end equipment.
  • Page 46 Cisco Discovery Protocol (CDP) is negotiation-based and determines which virtual LAN (VLAN) the Cisco IP Phone resides in. If you are using a Cisco switch, Cisco Discovery Protocol (CDP) is available and is enabled by default. CDP has these attributes: •...
  • Page 47 VLAN Settings If you are using a VLAN without CDP, you must enter a VLAN ID for the Cisco IP Phone. LLDP-MED The Cisco IP Phone supports Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-MED) for deployment with Cisco or other Third-Party network connectivity devices that use a Layer 2 auto discovery mechanism.
  • Page 48 • Time to live TLV • End of LLDPDU TLV There are some restrictions in the implementation of LLDP-MED on the Cisco IP Phones: • Storage and retrieval of neighbor information are not supported. • SNMP and corresponding MIBs are not supported.
  • Page 49 The system description includes the full name and version identification of the system hardware type, software operating system, and networking software. If implementations support IETF RFC 3418, the sysDescr object should be used for this field. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 50 For the outgoing LLDPDU, the TLV should have the device type 3 (End Point Class III) with the following bits set for 2-octet Capability field: Bit Position Capability LLDP-MED Capabilities Network Policy Extended Power via MDI-PD Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 51 The Power Priority is set to binary “0 0 0 0” to indicate unknown priority while the Power Value is set to maximum power value. The Power Value for the Cisco IP Phone is 12900mW. For the incoming LLDPDU, the TLV is ignored and not validated. Only one TLV is allowed in the outgoing and incoming LLDPDUs.
  • Page 52 If both LLDP-MED and CDP are enabled, during startup the phone sends both CDP and LLDP-MED PDUs at the same time. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 53 LLDP-MED and IEEE 802.X The Cisco IP Phone does not support IEEE 802.X and does not work in a 802.1X wired environment. However, IEEE 802.1X or Spanning Tree Protocols on network devices could result in delay of fast start response from switches.
  • Page 54 A static list of proxy servers is not always adequate. If your user agent serves different domains, for example, you do not want to configure a static list of proxy servers for each domain into every Cisco IP Phone. A simple way to support proxy redundancy is to configure a SIP Proxy Server in the Cisco IP Phone configuration profile.
  • Page 55 The Cisco IP Phone supports RFC-3261, the SIP UPDATE Method. SIP NOTIFY XML-Service The Cisco IP Phone supports the SIP NOTIFY XML-Service event. On receipt of a SIP NOTIFY message with an XML-Service event, the phone challenges the NOTIFY with a 401 response if the message does not contain correct credentials.
  • Page 56 A1 = username ":" realm ":" passwd and A2 = Method ":" digest-uri SIP Configuration SIP settings for the Cisco IP Phone are configured for the phone in general and for the extensions. Configure the Basic SIP Parameters Procedure Step 1 In the phone web user interface, navigate to Admin Login >...
  • Page 57 • TOOL—Vendor/Hardware-platform-software-version. Configure the SDP Payload Types Configured dynamic payloads are used for outbound calls only when the Cisco IP Phone presents a Session Description Protocol (SDP) offer. For inbound calls with an SDP offer, the phone follows the caller’s assigned dynamic payload type.
  • Page 58 Not all service providers provide NAT traversal. If your service provider does not provide NAT traversal, you have several options: • NAT Mapping with Session Border Controller • NAT Mapping with SIP-ALG Router Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 59 Check with your service provider to determine the requirements. Step 8 Click Submit All Changes. What to Do Next Configure the firewall settings on your router to allow SIP traffic. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 60 This procedure assumes that a syslog server is configured and is ready to receive syslog messages. To Determine Whether the Router Uses Symmetric or Asymmetric NAT: Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 61 Enter the IP address for the Syslog Server, if the port number is anything other than the default, 514. It is not necessary to include the port number if it is the default. The address and port number must be reachable from the Cisco IP phone. The port number appears on the output log file name. The default output file is (if port number was not specified).
  • Page 62 An intersequence tone played (and placed) between digits plays an , (comma) outside line dial tone. For example: 9, 1xxxxxxxxxx An outside line dial tone plays after the user presses . The tone continues until the user presses Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 63 9, an external dial tone sounds. The user must enter a 10-digit number that begins with a digit 2 through 9. The system automatically inserts the 1 prefix before it transmits the number to the carrier. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 64 (fast busy) tone if the dialed sequence is invalid. The following table explains how terminating events are processed. Terminating Event Processing Dialed digits have not matched any sequence in the The number is rejected. dial plan. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 65 Examples for the Dial Plan Timer Allow more time for users to start dialing after taking a phone off hook: (P9 | (9,8<:1408>[2-9]xxxxxx | 9,8,1[2-9]xxxxxxxxx | 9,8,011xx. | 9,8,xx.|[1-8]xx) Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 66 Default: 3 seconds. Syntax for the Interdigit Short Timer SYNTAX 1: S:s, (dial plan) Use this syntax to apply the new setting to the entire dial plan within the parentheses. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 67 Note Reset the Control Timers If you need to edit a timer setting only for a particular digit sequence or type of call, you can edit the dial plan. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 68 In the phone web user interface, navigate to Admin Login > advanced > Voice > Regional. Step 2 Configure the values in the fields in the Control Timer Values (sec) section. Step 3 Click Submit All Changes. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 69 Click Submit All Changes. Time and Date Settings The Cisco IP Phone obtains the time settings in one of three ways: • NTP Server—When the phone boots up, it tries to contact the first Network Time Protocol (NTP) server to get the time. The phone periodically synchronizes its time with the NTP server. The synchronization period is fixed at 1 hour.
  • Page 70 Select a Display Language on the Phone You can define up to twelve languages, in addition to English, to be available and host the dictionaries for each of the languages on the HTTP or TFTP provisioning server. Language support follows Cisco dictionary principles.
  • Page 71 • ar-AE: Arabic_U.A.E. • bg-BG: Bulgarian_Bulgaria • ca-ES: Catalan_Spain • zh-CN: Chinese_PRC • zh-HK: Chinese_Hong Kong • zh-TW: Chinese_Taiwan • hr-HV: Croatian_Croatia • cs-CZ: Czech_Czech Republic • da-DK: Danish_Denmark Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 72 Localization Configuration Example Language Selection: French (Entry dx must match one of the languages that the dictionary server supports.) Locale: fr-FR (Entry lx must be within the Locale option list.) Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 73 Cisco IP Phone 7800 Series Documentation Refer to publications that are specific to your language and phone model, and phone firmware release. Navigate from the following documentation URL: http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-7800-series/ tsd-products-support-series-home.html Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 74 Cisco IP Phone 7800 Series Documentation Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 75 Network Configuration The Cisco IP Phone is used as a part of a SIP network, because the phone supports Session Initiation Protocol (SIP). The Cisco IP Phone is compatible with other SIP IP PBX call control systems, such as BroadSoft, MetaSwitch, and Asterisk.
  • Page 76 Web-Based Configuration Utility Your phone system administrator can allow you to view the phone statistics and modify some or all the parameters. This section describes the features of the Cisco IP Phone that you can modify with the phone web user interface.
  • Page 77 Your system administrator might have disabled the phone option to make the phone web user interface viewable or writable. For more information, see the Cisco IP Phone 7800 Series and Cisco IP Phone 8800 Series for Third-Party Call Control Provisioning Guide.
  • Page 78 ID blocking, through the phone web user interface. Use phone profile provisioning to restrict the ability to configure individual parameters. For more information on provisioning, see the Cisco IP Phone 7800 Series and 8800 Series for Third-Party Call Control Provisioning Guide. Procedure Step 1 Click Admin Login >...
  • Page 79 P A R T Hardware and Accessory Installation • Cisco IP Phone Accessories, page 67 • Wall Mounts, page 71...
  • Page 81 Headsets, page 69 Supported Accessories The Cisco IP Phone 7800 Series supports both Cisco and third-party accessories. In the following table, an X indicates support for an accessory by a particular phone model and a dash (-) indicates no support.
  • Page 82 External speakers and microphones are plug-and-play accessories. You can connect an external PC-type microphone and powered speakers (with amplifier) on the Cisco IP Phone by using the line in/out jacks. Connecting an external microphone disables the internal microphone and connecting an external speaker disables the internal phone speaker.
  • Page 83 (cell) phones and two-way radios, some audio noise or echo may still occur. Either the remote party or both the remote party and the Cisco IP Phone user may hear an audible hum or buzz. A range of outside sources can cause humming or buzzing sounds; for example, electric lights, electric motors, or large PC monitors.
  • Page 84 Headsets Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 85 • Adjust the Handset Rest, page 79 Non-Lockable Wall Mount Components The following figure shows the components of the Cisco IP Phone 7800 Series Wall Mount Kit. Figure 2: Wall Mount Kit Components The package includes these items: • One phone bracket •...
  • Page 86 The wall mount kit can be mounted on most surfaces, including concrete, brick, and similar hard surfaces. To mount the kit on concrete, brick, or similar hard surfaces, you must provide the appropriate screws and anchors for your wall surface. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 87 Using a #2 Phillips-head screwdriver, carefully center the anchor over the pencil mark and press the anchor into the wall. d) Screw the anchor clockwise into the wall until it is seated flush. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 88 Attach the phone bracket by inserting the tabs into the mounting tabs on the back of the phone. The phone ports should be accessible through the holes in the bracket. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 89 (Optional) If you use an external power supply, plug the power cord into the phone. Dress the cord by clipping it into the clips that are incorporated into the phone body next to the PC port. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 90 Optional Power Cable Step 4 Attach the phone to the wall bracket by inserting the tabs on the top of the wall bracket into the slots on the phone bracket. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 91 Press the phone firmly into the wall bracket and slide the phone down. The tabs in the bracket click into position. Step 6 Proceed to Adjust the Handset Rest, on page Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 92 Figure 9: Tab Location To remove the phone and mounting plate from the wall bracket, you must disengage these tabs. Before You Begin You require two screwdrivers or metal rods. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 93 If your phone is wall-mounted or if the handset slips out of the cradle too easily, you may need to adjust the handset rest to ensure that the receiver does not slip out of the cradle. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 94 Line up the tab with the slot in the cradle and press the tab evenly into the slot. An extension protrudes from the top of the rotated tab. Step 5 Return the handset to the handset rest. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 95 P A R T Cisco IP Phone Administration • Cisco IP Phone Security, page 83 • Cisco IP Phone Customization, page 87 • Phone Features and Setup , page 97 • Corporate and Personal Directory Setup, page 111...
  • Page 97 Security features ensure that calls are secure and authenticated. Domain and Internet Setting Configure Restricted Access Domains If you enter domains, the Cisco IP Phone responds only to SIP messages only from the identified servers. Procedure Step 1 In the phone web user interface, navigate to Admin Login > advanced > Voice > System.
  • Page 98 • NetMask—Netmask of the phone • Gateway—Gateway IP address Step 4 Click Submit All Changes. DHCP Option Support The following table lists the DHCP options that are supported on the Cisco IP Phone. Network Standard Description DHCP option 1 Subnet mask...
  • Page 99 • TLS Handshake Protocol—Authenticates the server and client, and negotiates the encryption algorithm and cryptographic keys before the application protocol transmits or receives data. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 100 Documentation, Support, and Security Guidelines The Cisco IP Phone uses UDP as the standard for SIP transport, but the phone also supports SIP over TLS for added security. Configure SIP Over TLS Signaling Encryption Procedure Step 1 To enable TLS for the phone, in the phone web user interface, navigate to Admin Login > advanced >...
  • Page 101 Customize the Startup Screen You can create a text or 128-by-48 pixel by 1-bit deep image logo to display when the Cisco IP Phone boots up. A logo displays during the boot sequence for a short period after the Cisco logo displays.
  • Page 102 Background Picture field is set to PNG Picture. The phone does not reboot after you change the background image URL. A background image displays while the phone is running. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 103 Click Submit All Changes. Configure the Screen Saver You can configure a screen saver for the Cisco IP Phone. When the phone is idle for a specified time, it enters screen saver mode. Any button press returns the phone to normal mode. If a user password is set, the user must enter it to exit screen saver mode.
  • Page 104 Configure the Number of Call Appearances Per Line Phones that support multiple call appearances on a line can be configured to specify the number of calls to allow on the line. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 105 • Cfwd Busy Serv—Forwards calls only if the line is busy. • Cfwd No Ans Serv—Forwards calls only if the line is not answered. Step 3 Click Submit All Changes. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 106 You can allow users to turn the Do Not Disturb feature on or off. The feature plays a message to the caller to say that the user is unavailable. On the Cisco IP Phone, users can press the Ignore softkey to divert a ringing call to another destination.
  • Page 107 Under Call Feature Settings, use the Default Ring (n) drop-down list box to specify one of the following: • No Ring • 1 through 9—Choose one of the available ring tones. Step 3 Click Submit All Changes. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 108 User Access Control The Cisco IP Phone respects only the “ua” user access attribute. For a specific parameter, the “ua” attribute defines access by the user account to the administration web server. If the “ua” attribute is not specified, the phone applies the factory default user access for the corresponding parameter.
  • Page 109 4 characters or the maximum password length is 127 characters. Note Password can contain any character except: • Space key • 13 stars (*************) Step 7 Click Submit All Changes. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 110 Phone Web Server Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 111 Cisco IP Phone User Support If you are a system administrator, you are likely the primary source of information for Cisco IP Phone users in your network or company. It is important to provide current and thorough information to end users.
  • Page 112 Telephony Features for Cisco IP Phone After you add Cisco IP Phones to Third-Party Call Control system, you can add functionality to the phones. The following table includes a list of supported telephony features, many of which you can configure by using Third-Party Call Control system.
  • Page 113 Allows a noninitiator in a standard (ad hoc) conference to add or remove participants; also allows any conference participant to join together two standard conferences on the same line. Note Be sure to inform your users whether these features are activated. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 114 Allows the user to move a connected call from an active state to a held state. • No configuration required unless you want to use Music On Hold. See “Music On Hold” in this table for information. • See “Hold Reversion” in this table. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 115 Some JTAPI/TAPI applications are not compatible with the Join and Direct Transfer feature implementation on the Cisco IP Phone and you may need to configure the Join and Direct Transfer Policy to disable join and direct transfer on the same line or possibly across lines.
  • Page 116 Allows the phone to negotiate power using Link Level Endpoint Discovery Protocol (LLDP) and Cisco Discovery Protocol (CDP). Programmable Feature Buttons You can assign features, such as New Call, Call Back, and Forward All to line buttons. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 117 If the duration is less than one hour, the time is displayed in the Minute, Second (MM:SS) format. If the duration is less than one minute, the time is displayed in the Second (SS) format. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 118 An “X” in the table indicates that the feature is supported for the corresponding button type or softkey. Of the two button types and softkeys, only programmable feature buttons require configuration in Cisco IP Phone administration.
  • Page 119 Do Not Disturb Hold Hunt Groups Intercom Mute PLK Support for Queue Status Redial Speed Dial Speed Dial Line Status Transfer X (only displayed during connected call transfer scenario) Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 120 Denotes that a user who is logged in Idle to an ACD server has set his status as available. barge Barge Allows another user to interrupt a Shared-Active, shared call. Shared-Held Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 121 Ends a call. Connected, Off-hook, Progressing, Start-Xfer, Start-Conf, Conferencing, Releasing, Resume hold Hold Put a call on hold. Connected, Start-Xfer, Start-Conf, Conferencing ignore Ignore Ignores an incoming call. Ringing Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 122 Idle, Off-Hook (no input) xfer Transfer/ xfer Performs a call transfer. Requires that Connected, Start-Xfer Attn Xfer Serv is enabled and there is at least one connected call and one idle call. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 123 Transfers an active line on the phone Connected to a called number. Requires that Attn Xfer Serv is enabled and there are two or more calls that are active or on hold. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 124 Programmable Softkeys Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 125 • From a web browser: Users can access the PAB and Speed Dials features from the Configuration Utility web page. • From the Cisco IP Phone: Choose Contacts to search the corporate directory or the user personal directory. • From a Microsoft Windows application: Users can use the TABSynch tool to synchronize their PABs with Microsoft Windows Address Book (WAB).
  • Page 126 LDAP Configuration LDAP Configuration The Cisco IP Phone supports Lightweight Directory Access Protocol (LDAP) v3. LDAP Corporate Directory Search allows a user to search a specified LDAP directory for a name, phone number, or both. LDAP-based directories, such as Microsoft Active Directory 2003 and OpenLDAP-based databases, are supported.
  • Page 127 In the XML User Name field, enter the username of XML service. Step 5 In the XML Password field, enter the password of XML service. Step 6 Click Submit All Changes. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 128 Configure the XML Directory Service Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 129 P A R T Cisco IP Phone Troubleshooting • Monitoring Phone Systems, page 117 • Troubleshooting , page 169 • Maintenance, page 179...
  • Page 131 • Status menu: Provides access to screens that display the status messages, network statistics, and statistics for the current call. You can use the information that displays on these screens to monitor the operation of a phone and to assist with troubleshooting. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 132 Cisco IP Phone Status You can also obtain much of this information, and obtain other related information, remotely through the phone web page. For more information about troubleshooting the Cisco IP Phone 7800 Series, see Troubleshooting , on page 169.
  • Page 133 No network connectivity between the IPv4 DHCP server and the phone: Verify the network connections. IPv4 DHCP server is down: Check configuration of IPv4 DHCP server. Errors persist: Consider assigning a static IPv4 address. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 134 None. This message indicates the name of the corresponding to the phone device configuration file for the phone. name Display Network Statistics Window To display the Network Statistics screen, perform these steps: Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 135 Cause of the last reset of the phone • Hardware Reset (Power-on reset) • Software Reset (memory controller also reset) • Software Reset (memory controller not reset) • Watchdog Reset • Unknown Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 136 A single call can use multiple voice streams, but data is captured for only the last voice stream. A voice stream is a packet stream between two endpoints. If one endpoint is put on hold, the voice stream stops even though Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 137 Max Jitter Maximum jitter, in milliseconds, that was observed since the receiving voice stream opened. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 138 Determine the IP Address of the Phone, on page 62 Allow Web Access to the Cisco IP Phone, on page 63 Info The fields on this tab are read-only and cannot be edited. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 139 If the unit has already retrieved its customized profile, this field displays the name of the company that provisioned the unit. Serial Number Serial number of the Cisco IP Phone. Hardware Version Version number of the Cisco IP Phone hardware. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 140 Each line and call on the phone display with the following parameters. Parameter Description Call State Status of the call. Duration Duration of the call. Remote Address Address of the remote device. Local Address Address of the local device. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 141 Cisco IP Phone uses. AVG MOS LQK Average MOS LQK score observed for the entire voice stream. Min MOS LQK Lowest MOS LQK score observed from start of the voice stream. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 142 The phone discards payload type 19 comfort noise packets that Note are generated by Cisco gateways, which increments this counter. Download Status PNG Download Status Parameter Description Last PNG Download Status Displays the last downloaded PNG status. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 143 Custom CA Provisioning Status Indicates whether provisioning using a custom CA succeeded or failed: • Last provisioning succeeded on mm/dd/yyyy HH:MM:SS; or • Last provisioning failed on mm/dd/yyyy HH:MM:SS Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 144 • Not Installed—Displays if no custom CA certificate is installed. Custom CA certificates are configured in the Provisioning tab. For more information about custom CA certificates, see the Cisco IP Phone 7800 Series and 8800 Series for Third-Party Call Control Provisioning Guide.
  • Page 145 TxtotalGoodPkt Total number of good packets (multicast, broadcast, and unicast) that the phone received. Txcollisions Total number of collisions that occurred while a packet was transmitted. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 146 IP address of the neighbor device that LLDP discovered. LLDPNeighborPort Neighbor device port to which the phone connects that LLDP discovered. PortSpeed Speed and duplex information. DHCP Parameter Description IPv4 Information on the DHCP status. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 147 Version of the browser. For example, Firefox 31 OS Version Version of the Windows operating system. Platform The platform to which the browser is compiled. Width Current width of the browser. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 148 Lets you enable or disable local access to the phone web user interface. Select Yes or No from the drop-down menu. Default: Yes Admin Password Password for the administrator. Default: No password User Password Password for the user. Default: Blank Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 149 If you are using LDAP, see the LDAP Configuration, on page 112. Primary DNS DNS server used by the Cisco IP Phone in addition to DHCP supplied DNS servers if DHCP is enabled; when DHCP is disabled, this is the primary DNS server. Default: Blank...
  • Page 150 Cisco IP Phone Web Page Parameter Description Secondary DNS DNS server used by the Cisco IP Phone in addition to DHCP supplied DNS servers if DHCP is enabled; when DHCP is disabled, this is the secondary DNS server. Default: Blank Syslog Server Specify the syslog server name and port.
  • Page 151 Enable VLAN Choose Yes to enable VLAN. Choose No to disable. Enable CDP Enable CDP only if you are using a switch that has Cisco Discovery Protocol. CDP is negotiation based and determines which VLAN the IP phone resides in.
  • Page 152 SIP Accept Language Accept-Language header used. To access, click the SIP tab, and fill in the SIP Accept Language field. There is no default. If empty, the header is not included. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 153 Max INVITE Retry Attempts Maximum number of INVITE retry attempts by the phone. Default: 6 Max NON-INVITE Retry Attempts Maximum number of NON-INVITE retry attempts by the phone. Default: 6 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 154 Ranges from 0 to 2000000. Default: 30 Reg Retry Intv Interval to wait before the Cisco IP Phone retries registration after failing during the last registration.The range is from 1 to 2147483647 Default: 30...
  • Page 155 10 even number ports (twice the number of lines); for example, configure RTP port min to 16384 and RTP port max to 16538. Default: 16384 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 156 IP and VIA sent-by IP values differ. Default: No Substitute VIA Addr Enables the user to use NAT-mapped IP:port values in the VIA header. Default: No Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 157 RTP port number in all outgoing SIP messages is substituted for the corresponding port value in the external RTP port range. Default: 0 NAT Keep Alive Intvl Interval between NAT-mapping keep alive messages. Default: 15 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 158 If the delay is set to 0, the device does not try to resync again following a failed resync attempt. Default: 3600 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 159 The message sent to the syslog server at the start of a resync attempt. Default: $PN $MAC –Requesting % $SCHEME://$SERVIP:$PORT$PATH Log Success Msg The syslog message issued upon successful completion of a resync attempt. Default: $PN $MAC –Successful % $SCHEME://$SERVIP:$PORT$PATH -- $ERR Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 160 After upgrade to enterprise image, the phone cannot revert to Note 3PCC. For information about the Provisioning page, see the Cisco IP Phone 7800 Series and 8800 Series for Third-Party Call Control Provisioning Guide. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 161 The Interdigit_Long_Timer is used after any one digit, if all valid matching sequences in the dial plan are incomplete as dialed. Range: 0–64 seconds. Default: 10 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 162 Selects the number of hours to add to GMT to generate the local time for caller ID generation. Choices are GMT-12:00, GMT-11:00,…, GMT, GMT+01:00, GMT+02:00, …, GMT+13:00. Default: GMT-08:00 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 163 The <day> value equals [+|-] any value in the range 1-31. If <day> is 1, it means the <weekday> on or before the end of the month (in other words the last occurrence of < weekday> in that month). Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 164 Default: Blank The maximum number of characters is 512. For example: <Language_Selection ua="na"> Spanish </Language_Selection> Locale Choose the locale that should be set in the HTTP Accept-Language header Default: en-US Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 165 URL locating the (.png) file to display on the phone screen background. For more information, see the Phone Information and Display Settings, on page Select Logo Select from None, PNG Picture, or Text Logo. Default: None Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 166 In screen saver mode, the display unit can display: • A background picture. • Station time in the middle of the screen. • A moving Cisco icon. When the phone is locked, the status line displays a scrolling message Press any key to unlock your phone •...
  • Page 167 Enable/disable block-anonymous-call service. Default: Yes Call Back Serv Enable/disable call-back service. Default: Yes Block CID Serv Enable/disable blocking outbound Caller-ID service. Default: Yes Cfwd All Serv Enable/disable call-forward-all service. Default: Yes Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 168 Default: Blank Directory Password Alphanumeric password associated with the User ID. Default: Blank LDAP Corporate Directory Search Parameter Description LDAP Dir Enable Choose Yes to enable LDAP. Default: No Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 169 Default: Blank LDAP Search Base Specify a starting point in the directory tree from which to search. Separate domain components [dc] with a comma. For example: dc=cv2bu,dc=com Default: Blank Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 170 Additional customized search item. Can be blank if not needed. Default: Blank LDAP Item 4 Filter Customized filter for the searched item. Can be blank if not needed. Default: Blank Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 171 555 1212 would become 9555 1212. If you do not manipulate the number in this fashion, a user can use the Edit Dial feature to edit the number before dialing out. Default: Blank Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 172 Speed Dial You can configure speed dials on the Cisco IP Phone from the LCD GUI or the web GUI. Speed Dial 2 to 9: Target phone number (or URL) assigned to speed dial 2, 3, 4, 5, 6, 7, 8, or 9. Press the digit key (2-9) to dial out the assigned number.
  • Page 173 Sets the default volume for the speakerphone. Default: 8 Handset Volume Sets the default volume for the handset. Default: 10 Headset Volume Sets the default volume for the headset. Default: 10 Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 174 • Metaswitch • Asterisk • Other Share Line Appearance Parameter Description Share Ext Indicates whether this extension is to be shared with other Cisco IP phones or private. Default: Yes Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 175 To use externally mapped IP addresses and SIP/ RTP ports in SIP messages, select yes. Otherwise, select no. Default: No NAT Keep Alive Enable To send the configured NAT keep alive message periodically, select yes. Otherwise, select no. Default: No Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 176 (18x) and use of PRACK requests. Select Yes to enable. Default: No EXT SIP Port The external SIP port number. Auth Resync-Reboot The Cisco IP Phone authenticates the sender when it receives a NOTIFY message with the following requests: • resync • reboot • report •...
  • Page 177 Identifies the SpecVM server for the phone, generally the IP address, and port number of the VM server. Voice Mail Subscribe Interval The expiration time, in seconds, of a subscription to a voice mail server. Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 178 Proxy and Registration section to Yes. Register Enables periodic registration with the proxy. This parameter is ignored if a proxy is not specified. To enable this feature, select Yes. Default: Yes Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 179 Name displayed as the caller ID. User ID Extension number for this line. Password Password for this line. Default: Blank (no password required) Auth ID Authentication ID for SIP authentication. Default: Blank Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 180 If the second codec fails, this codec is tried. Default: Unspecified G711u Enable Enables use of the G.711u codec. Default: Yes G711a Enable Enables use of the G.711a codec. Default: Yes Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 181 Use Remote Pref Codec To use, Use Remote Preferred Codec, select Yes. Otherwise, select No. Default: No Dial Plan For more information about dial plan, see the Dial Plan Overview, on page Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 182 Displays the call history for the phone. To change the information displayed, select the type of call history from the drop-down list: • All Calls • Received Calls • Placed Calls • Missed Calls Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 183 • Troubleshooting Procedures, page 176 • Additional Troubleshooting Information, page 177 General Troubleshooting Information The following table provides general troubleshooting information for the Cisco IP Phone. Table 12: Cisco IP Phone Troubleshooting Summary Explanation Connecting a Cisco IP Phone to...
  • Page 184 The RxSize and the TxSize statistics show the size of the voice packets phone and another device that are used in a conversation between this Cisco IP Phone and the other device. The values of these statistics should match. See...
  • Page 185 ◦ Disconnect a functioning Cisco IP Phone from another port and connect it to this network port to verify that the port is active. ◦ Connect the Cisco IP Phone that does not start up to a different network port that is known to be good.
  • Page 186 If you continue to have problems with a particular phone that other suggestions in this chapter do not resolve, the configuration file may be corrupted. Solution Configuration file can be retrieved by remote provisioning from provisioning server using resync Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 187 If users report that their phones are resetting during calls or while the phones are idle on their desk, you should investigate the cause. If the network connection and Third Party Call Control connection are stable, a Cisco IP Phone should not reset.
  • Page 188 If the phone is assigned a static IP address, verify that you have entered the correct settings. Phone Resets During Heavy Network Usage Problem If the Cisco IP Phone appears to reset during heavy network usage, it is likely that you do not have a voice VLAN configured. Solution Isolating the phones on a separate auxiliary VLAN increases the quality of the voice traffic.
  • Page 189 A user complains about not being able to make a call. Cause The phone does not have a DHCP IP address. The phones display the message Configuring IP or Registering. Solution 1 Verify the following: Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 190 If you are using DHCP, check the IP addresses that your DHCP server distributes. See the Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document, available at this URL: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml Verify DNS Settings To verify DNS settings, follow these steps: Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 191 Third-Party Call Control. You must also ensure that DNS is configured to do reverse lookups. Additional Troubleshooting Information If you have additional questions about troubleshooting your phone, go to the following Cisco website and navigate to the desired phone model: http://www.cisco.com/cisco/web/psa/troubleshoot.html...
  • Page 192 Additional Troubleshooting Information Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...
  • Page 193 Phone Behavior During Times of Network Congestion, page 183 Basic Reset Performing a basic reset of a Cisco IP Phone provides a way to recover if the phone experiences an error and provides a way to reset or restore various configuration and security settings.
  • Page 194 To restore phone configuration or settings to factory default, press Ok. Voice Quality Monitoring To measure the voice quality of calls that are sent and received within the network, Cisco IP Phones use these statistical metrics that are based on concealment events. The DSP plays concealment frames to mask frame loss in the voice packet stream.
  • Page 195 Ratio of zero indicates that the IP network is delivering frames and packets on time with no loss. You can access voice quality metrics from the Cisco IP Phone using the Call Statistics screen or remotely by using Streaming Statistics.
  • Page 196 Cisco IP Phone Cleaning To clean your Cisco IP Phone, use only a dry soft cloth to gently wipe the phone and the phone screen. Do not apply liquids or powders directly to the phone. As with all non-weatherproof electronics, liquids and powders can damage the components and cause failures.
  • Page 197 Phone Behavior During Times of Network Congestion Anything that degrades network performance can affect Cisco IP Phone voice and video quality, and in some cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following activities: •...
  • Page 198 Phone Behavior During Times of Network Congestion Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide...

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