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Appendix C Technical Specifications
Network Port Pinouts
C-2
Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager
OL-14029-01
Network Port Pinouts
Although both the network and access ports are used for network connectivity,
they serve different purposes and have different port pinouts.
Table C-2 describes the network port connector pinouts.
Ta b l e C-2 Network Port Connector Pinouts
Pin Number Function
1 TD+
2 TD–
3 RD+
4 Not used
5 Not used
6 RD–
7 Not used
8 Not used
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 One (2) pair of Category 3 for 10-Mbps cables or
One (2) pair of Category 5 for 100-Mbps cables
RJ-9 jack (4-conductor) for handset and headset connection.
RJ-45 jack for the LAN 10/100BaseT connection.
48-volt power connector.
Distance Requirements As supported by the Ethernet Specification, it is assumed that most
Cisco
Unified IP Phones should be within 330 feet (100m) of a phone closet.
Table C-1 Physical and Operating Specifications (continued)
Specification Value or Range
100


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