Cisco 7975G Software Manual page 282

Computer Port Connector
Pin number
2
3
4
5
6
7
8
Note
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
262
Function
BI_DB-
BI_DA+
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