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Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)
OL-20861-01
Appendix C Technical Specifications
Cable Specifications
Note For power information regarding the Cisco Unified IP Key Color Expansion Module, see the “Power
Information” section on page 4-2.
Cable Specifications
• RJ-9 jack (4-conductor) for handset and headset connection.
• RJ-45 jack for the LAN 10/100/1000BaseT connection (10/100/1000 Network port on the
Cisco
Unified IP Phone 8961, 9951, and 9971).
• RJ-45 jack for a second 10/100/1000BaseT compliant connection (10/100/1000 Computer port on
the Cisco
Unified IP Phone 8961, 9951, and 9971).
• 3.5 mm jack for microphone and speaker connection (for Cisco Unified IP Phones 9951 and 9971
only).
• 48-volt power connector.
Network and Computer Port Pinouts
Although both the network and computer (access) ports are used for network connectivity, they serve
different purposes and have different port pinouts.
• The Network port is the 10/100/1000 SW port on the Cisco Unified IP Phone.
• The Computer (access) port is the 10/100/1000 PC port on the Cisco Unified IP Phone.
Network Port Connector
Table C-2 describes the Network port connector pinouts.
Table C-2 Network Port Connector Pinouts
Pin Number Function
1BI_DA+
2BI_DA-
3BI_DB+
4BI_DC+
5BI_DC-
6BI_DB-
7BI_DD+
8BI_DD-
Note “BI” stands for bi-directional, while DA, DB, DC and DD stand for “Data A”, “Data
B”, “Data C” and “Data D”, respectively.