Cisco Systems OL-8555-01 用户手册

Phone registration

Call preservation, so that a media session continues if signaling is lost 
between the primary CallManager and a phone)

For information about configuring Cisco Unified CallManager to work with the 
IP devices described in this chapter, refer to Cisco Unified CallManager 
Administration Guide, Cisco Unified CallManager System Guide, and to 
Cisco Unified CallManager Security Guide.

For an overview of security for the Cisco Unified IP Phone, see the 

.

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 CallManager Administration, 
go to the following URL and install the latest support patch for your version of 
Cisco Unified CallManager: 

The Cisco Unified IP Phone 7960G and 7940G 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 address might not be available to assign the phone to the same 
subnet as other devices connect to the same port.