Use of 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 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. 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
Third-Party Call Control system 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 Third-Party Call Control system 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
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.
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
Third-Party Call Control system before sending and receiving calls.