Cisco 7912G User Manual download pdf (Page 166)

Appendix D Technical Specifications

Cable Specifications

D-2

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones

OL-8131-01

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 D-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 Unified IP Phones should be

within 100m (330 feet) of a phone closet.

Table D-1 Physical and Operating Specification (continued)

Specification Value or Range

1 2 ... 161 162 163 164 165 166 167 168 169 170 171 ... 187 188

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Cisco 7912G User Manual Page 166