Cisco 7941G Administration Manual page 274

Computer Port Connector
Pin number
4
5
6
7
8
Note
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco
Unified Communications Manager 9.0 (SCCP and SIP)
254
Function
BI_DD+
BI_DD-
BI_DA-
BI_DC+
BI_DC-
BI stands for bidirectional, while DA, DB, DC and DD stand for Data A, Data B, Data C and Data
D respectively.
Technical Specifications