Understanding How The Cisco Unified Ip Phone Interacts With The Vlan - Cisco 7942G Administration Manual

Understanding Interactions with Other Cisco Unified IP Telephony Products
Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified
Communications Manager
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:
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For information about configuring Cisco Unified Communications Manager to work with the IP devices
described in this chapter, refer to Cisco Unified Communications Manager Administration Guide, Cisco
Unified Communications Manager System Guide, and Cisco Unified Communications Manager Security
Guide.
For an overview of security functionality for the Cisco Unified IP Phone, see the
Security Features for Cisco Unified IP Phones" section on page
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:
http://www.cisco.com/kobayashi/sw-center/sw-voice.shtml
Related Topic
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Understanding How the Cisco Unified IP Phone Interacts with the VLAN

The Cisco Unified IP Phone 7962G and 7942G 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:
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Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 6.1(3)
2-2
Firmware for phones
Authentication and encryption (if configured for the telephony system)
Configuration file and CTL file, via TFTP service
Phone registration
Call preservation, so that a media session continues if signaling is lost between the primary
Communications Manager and a phone
Telephony Features Available for the Cisco Unified IP Phone, page 5-1
The current VLANs might be configured on an IP subnet basis. However, additional IP addresses
might not be available to assign the phone to the same subnet as other devices connected to the same
port.
Data traffic present on the VLAN supporting phones might reduce the quality of Voice-over-IP
traffic.
Network security may indicate a need to isolate the VLAN voice traffic from the VLAN data traffic.
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
1-8.
"Understanding
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