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Appendix B Technical Specifications
Cable Specifications
B-2
Cisco IP Phone Administration Guide for Cisco CallManager 3.3, Cisco IP Phones 7902G/7905G/7912G
OL-6313-01
Cable Specifications
• 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.
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 B-1 Physical and Operating Specification (continued)
Specification Value or Range