Cisco CP-7961G-GE Administration Guide - Page 44

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network 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: • Firmware for phones • Authentication and encryption (if configured for the telephony system) • Configuration, 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 Communications Manager and a phone 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 Understanding Security Features for Cisco Unified IP Phones, page 1-11. Note If the Cisco Unified IP Phone model that you want to configure does not appear in the Phone Type 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 Telephony Features Available for the Cisco Unified IP Phone, page 5-1 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: • 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. Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP) 2-2 OL-21011-01