Table Of Contents

Technical Specifications of the Cisco Phone IP 7960G/7940G

Physical and Operating Environment Specifications

Cable Specifications

Regulatory Safety Compliance

Connection Specifications

Technical Specifications of the Cisco Phone IP 7960G/7940G

The following sections describe the technical specifications for the Cisco IP Phone 7960G/7940G:

Physical and Operating Environment Specifications

Cable Specifications

Regulatory Safety Compliance

Connection Specifications

Physical and Operating Environment Specifications

Table C-1 lists the physical and operating specifications of the Cisco IP Phone 7960G/7940G.

Table C-1 Cisco IP Phone 7960G/7940G Operational and Physical Specifications 

Value or Range

Operating temperature

32 to 104° F (0 to 40° C).

Operating relative humidity

10 to 95% (noncondensing).

Storage temperature

14 to 140° F (-10 to 60° C).


8 in. (20.32 cm).


10.5 in. (26.67 cm).


6 in. (15.24 cm).


3.5 lb (1.6 kg).


100 to 240 VAC, 50 to 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 pair of Category 3 cables for 10 Mbps.
Two pair of Category 5 cables for 100 Mbps.

Distance requirements

As supported by the Ethernet specification, it is assumed that most phones that are deployed in the field will be within 330 ft (100 m) of a phone closet.

Cable Specifications

The following cables are required to connect the Cisco IP Phone 7960G/7940G:

RJ-11 for the handset connection.

RJ-45 jack for the LAN connection (labeled "10/100 SW").

RJ-45 jack for a second 10BASE-T compliant connection (labeled "10/100 PC").

48-volt power connector. The diameter of the center pin in the phone power jack (Switchcraft 712A) is 0.1 in (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.

Regulatory Safety Compliance

For international agency compliance, safety, and statutory information on Cisco IP phone models in the 7900 series, refer to Regulatory Compliance and Safety Information for the Cisco IP Phone 7900 Series at

Connection Specifications

The Cisco IP Phone 7960G/7940G has two RJ-45 ports that each support 10/100 Mbps half- or full-duplex connections to external devices—the network port and the access port. You can use either Category 3 or Category 5 cabling for 10-Mpbs connections, but use Category 5 for 100-Mbps connections. On both the LAN-to-phone port (left RJ-45 port facing the back of the phone) and the PC-to-phone port (right port), use full-duplex to avoid collisions. Use the LAN-to-phone port to connect the phone to the network. Use the PC-to-phone port to connect a network device, such as a computer, to the phone.

For a diagram that identifies the different ports on the back of the Cisco IP Phone 7960G/7940G, see the Figure 1-3 on page 1-6.


Posted: Fri Sep 22 13:19:53 PDT 2006
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