Table B-1 shows the physical and operating environment specifications for the Cisco IP Phone models 7902G/7905G/7912G.
Table B-1 Physical and Operating Specification
Value or Range
0° to 40°C (32° to 104°F)
Operating relative humidity
10% to 95% (non-condensing)
-10° to 60°C (14° to 140°F)
20.32 cm (8 in.)
17.67 cm (7 in.)
15.24 cm (6 in.)
0.9 kg (1.9 lb)
•100-240 VAC, 50-60 Hz, 0.5 A—when using the AC adapter
•48 VDC, 0.2 A—when using the in-line power over the network cable
Two (2) pair of Category 3 for 10-Mbps cables Two (2) pair of Category 5 for 100-Mbps cables
As supported by the Ethernet Specification, it is assumed that most Cisco IP Phones should be within 100m (330 feet) of a phone closet.
•RJ-11 jack for handset connection
•RJ-45 jack for the LAN 10/100BASE-T connection (labeled LAN)
•48-volt power connector. The diameter of the center pin in the phone power jack (Switchcraft 712A) is .1 inch (2.5 mm). The center pin is positive (+) voltage. The miniature power plug required to mate with the power jack on the phone is a Switchcraft 760 or equivalent.
Network Port Pinouts
Although both the network and access ports are used for network connectivity, they serve different purposes and have different port pinouts.
Network Port Connector
Table B-2 describes the network port connector pinouts.