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Appendix A Technical Specifications
Cable Specifications
A-2
Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
Cable Specifications
• RJ-11 jack for handset connection
• RJ-45 jack for the LAN 10/100BaseT connection (labeled LAN)
• RJ-45 jack for a second 10/100BaseT compliant connection (labeled PC)
• 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 and Access 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 A-2 describes the network port connector pinouts.
Weight
• Cisco IP Phone 7960/7940—1.6 kg (3.5 lb)
• Cisco IP Phone 7910—1.0 kg (2.2 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 IP Phones should be within 100m (330 feet) of a phone closet.
Table A-1 Cisco IP Phone Specifications (continued)
Specification Value or Range