Filter
Top Products
2-2
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
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,
i
ntegrating traditional PBX functionality with the corporate IP network. Cisco Unified Communications
Ma
nager 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
Commu
nications Manager also provides:
• Firmware for phones
• Configuration 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
For information about configuring Cisco Unified Communications Manager to work with the IP devices
described in this chapter, go to the Cisco Unified IP Phone Configuration ch
apter in the Cisco Unified
Communications Manager Administration Guide.
For an overview of security functionality for the Cisco Unified IP Phone, see the “Understanding
Security Features for Cisco Unifie
d IP Phones” section on page 1-13.
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/cisco/software/navigator.html?mdfid=268439621&catid=2788752
40
For more information, refer to “S
oftware Upgrades” chapter in the Cisco Unified Communications
Operating System Administration Guide.
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 6921, 6941, and 6961 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.