Cisco Systems 8851 Manual De Usuario
A Cisco IP Phone, like other network devices, must be configured and managed. These phones encode and
decode the following codes:
decode the following codes:
• G.711 a-law
• G.711 mu-law
• G.722
• G.729a/G.729ab
• G.726
• iLBC
• L16
• OPUS
• iSAC
Using a cell, mobile, or GSM phone, or two-way radio in close proximity to a Cisco IP Phone might cause
interference. For more information, see the manufacturer’s documentation of the interfering device.
interference. For more information, see the manufacturer’s documentation of the interfering device.
Caution
Cisco IP Phones provide traditional telephony functionality, such as call forwarding and transferring, redialing,
speed dialing, conference calling, and voice messaging system access. Cisco IP Phones also provide a variety
of other features.
speed dialing, conference calling, and voice messaging system access. Cisco IP Phones also provide a variety
of other features.
As with other network devices, you must configure Cisco IP Phones to prepare them to access Cisco Unified
Communications Manager and the rest of the IP network. By using DHCP, you have fewer settings to configure
on a phone. If your network requires it, however, you can manually configure information such as: an IP
address, TFTP server, and subnet information.
Communications Manager and the rest of the IP network. By using DHCP, you have fewer settings to configure
on a phone. If your network requires it, however, you can manually configure information such as: an IP
address, TFTP server, and subnet information.
Cisco IP Phones can interact with other services and devices on your IP network to provide enhanced
functionality. For example, you can integrate Cisco Unified Communications Manager with the corporate
Lightweight Directory Access Protocol 3 (LDAP3) standard directory to enable users to search for coworker
contact information directly from their IP phones. You can also use XML to enable users to access information
such as weather, stocks, quote of the day, and other web-based information.
functionality. For example, you can integrate Cisco Unified Communications Manager with the corporate
Lightweight Directory Access Protocol 3 (LDAP3) standard directory to enable users to search for coworker
contact information directly from their IP phones. You can also use XML to enable users to access information
such as weather, stocks, quote of the day, and other web-based information.
Finally, because the Cisco IP Phone is a network device, you can obtain detailed status information from it
directly. This information can assist you with troubleshooting any problems users might encounter when using
their IP phones. You can also obtain statistics about a current call or firmware versions on the phone.
directly. This information can assist you with troubleshooting any problems users might encounter when using
their IP phones. You can also obtain statistics about a current call or firmware versions on the phone.
To function in the IP telephony network, the Cisco IP Phone must connect to a network device, such as a
Cisco Catalyst switch. You must also register the Cisco IP Phone with a Cisco Unified Communications
Manager system before sending and receiving calls.
Cisco Catalyst switch. You must also register the Cisco IP Phone with a Cisco Unified Communications
Manager system before sending and receiving calls.
Cisco IP Phone 8811
The following sections describe attributes of the Cisco IP Phone 8811.
Phone Connections
Connect your phone to the corporate IP telephony network, using the following diagram.
Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager
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Cisco IP Phone 8811