Cisco Unified IP Phone and Cisco Unified Communications Manager Interactions
Cisco Unified IP Phone and Cisco Unified Communications Manager
Interactions
Cisco Unified Communications Manager is an open and industry-standard call processing system.
Cisco Unified Communications Manager software sets up and tears down calls between phones, integrating
traditional PBX functionality with the corporate IP network. Cisco Unified Communications Manager manages
the components of the IP telephony system—the phones, the access gateways, and the resources necessary
for features such as call conferencing and route planning. Cisco Unified Communications Manager also
provides:
• Firmware for phones
• Authentication and encryption (if configured for the telephony system)
• Configuration, certificate trust list (CTL), and Identity Trust List (ITL) files via the TFTP service
• Phone registration
• Call preservation, so that a media session continues if signaling is lost between the primary
For information about configuring Cisco Unified Communications Manager to work with the IP devices
described in this chapter, see the Cisco Unified Communications Manager Administration Guide, Cisco Unified
Communications Manager System Guide, and Cisco Unified Communications Manager Security Guide.
If the Cisco Unified IP Phone model that you want to configure does not appear in the Phone Type
Note
drop-down list in Cisco Unified Communications Manager Administration, go to the following URL and
install the latest support patch for your version of Cisco Unified Communications Manager:
www.cisco.com/kobayashi/sw-center/sw-voice.shtml
Related Topics
Telephony Features Available for Cisco Unified IP Phone
Cisco Unified IP Phone Security Features
Cisco Unified IP Phones and VLAN Interaction
The Cisco Unified IP Phones have an internal Ethernet switch, enabling forwarding of packets to the phone,
and to the access port and the network port on the back of the phone.
If a computer is connected to the access port, the computer and the phone share the same physical link to the
switch and share the same port on the switch. This shared physical link has the following implications for the
VLAN configuration on the network:
• The current VLANs might be configured on an IP subnet basis. However, additional IP addresses might
• Data traffic present on the VLAN supporting phones might reduce the quality of VoIP traffic.
• Network security may need to isolate the VLAN voice traffic from the VLAN data traffic.
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco
Unified Communications Manager 9.0 (SCCP and SIP)
2
Communications Manager and a phone
not be available to assign the phone to the same subnet as other devices connected to the same port.
Cisco Unified IP Phones and Your Network
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