Table Of Contents

Technical Specifications

Physical and Operating Environment Specifications

Cable Specifications

Network Port Pinouts

Technical Specifications

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The following sections describe the technical specifications for the Cisco Unified IP Phone 7905G and 7912G.

•Physical and Operating Environment Specifications

•Cable Specifications

•Network Port Pinouts

Physical and Operating Environment Specifications

Table F-1 shows the physical and operating environment specifications for the Cisco Unified IP Phone 7905G and 7912G.

Table F-1 Physical and Operating Specification 

Specification	Value or Range
Operating temperature	0° to 40°C (32° to 104°F)
Operating relative humidity	10% to 95% (non-condensing)
Storage temperature	-10° to 60°C (14° to 140°F)
Height	20.32 cm (8 in.)
Width	17.67 cm (7 in.)
Depth	15.24 cm (6 in.)
Weight	0.9 kg (1.9 lb)
Power	•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
Cables	Two (2) pair of Category 3 for 10-Mbps cables Two (2) pair of Category 5 for 100-Mbps cables
Distance Requirements	As supported by the Ethernet Specification, it is assumed that most Cisco Unified IP Phones should be within 100m (330 feet) of a phone closet.

Cable Specifications

The Cisco Unified IP Phone 7905G/7912G has these cable requirements:

•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 F-2 describes the network port connector pinouts.

Table F-2 Network Port Connector Pinouts 

Pin Number	Function
1	TD+
2	TD-
3	RD+
4	+48 Volts return1
5	+48 Volts return1
6	RD-
7	+48 Volts source1
8	+48 Volts source1

1 When used to receive power from an inline power card in the Cisco Catalyst switch.

Access Port Connector

Table F-3 describes the access port connector pinouts.

Table F-3 Access Port Connector Pinouts 

Pin Number	Function
1	RD+
2	RD-
3	TD+
4	Not Used
5	Not Used
6	TD-
7	Not Used
8	Not Used