Cisco 9971 - Computer Port Connector; Network and Computer Port Pinouts; Network Port Connector

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3.5 mm jack for microphone and speaker connection (for Cisco Unified IP Phone 9951 and 9971 only)
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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.
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The network port is the 10/100/1000 SW port on the Cisco Unified IP Phone.
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The computer (access) port is the 10/100/1000 PC port on the Cisco Unified IP Phone.
Network Port Connector
The following table describes the network port connector pinouts.
Table 2: Network Port Connector Pinouts
FunctionPin Number
BI_DA+1
BI_DA-2
BI_DB+3
BI_DC+4
BI_DC-5
BI_DB-6
BI_DD+7
BI_DD-8
BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and Data
D respectively.
Note
Computer Port Connector
The following table describes the computer port connector pinouts.
Table 3: Computer (Access) Port Connector Pinouts
FunctionPin Number
BI_DB+1
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Cable Specifications