Cisco 7912G - Manual (Page 30)

Chapter 1 An Overview of the Cisco Unified IP Phone
Understanding the Cisco Unified IP Phone 7905G and 7912G
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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones
OL-8131-01
Caution Using a cell, mobile, or GSM phone, or two-way radio in close proximity to a
Cisco Unified IP Phone might cause interference. For more information, refer to
the manufacturer’s documentation of the interfering device.
Understanding the Cisco Unified IP Phone 7905G and
7912G
The Cisco Unified IP Phone 7905G and 7912G are basic IP phones that address
the voice communication needs of employees who engage in low to medium
telephone use. The phones provide a pixel display and dynamic softkeys for easy
access to a core set of business features. They support a maximum of two calls
and one directory number, and inline power for receiving power through and
Ethernet connection. The Cisco Unified IP Phone 7912G includes an integrated
10/100 Ethernet switch for connecting a PC.
Note The hardware updated version of the Cisco Unified IP Phone 7912G
(CP-7912G-A) offers IEEE 802.1Q VLAN-based switching of packets received
from the attached PC and from the network port (upstream switch). This allows
the phone to operate more efficiently in networks which may be subject to large
amounts of broadcast, multicast and/or unknown unicast traffic.
Figure 1-1 shows the main components of the Cisco Unified IP Phone 7905G and
7912G.