Cisco 6921 - Unified IP Phone Standard VoIP Administration Manual page 137

Appendix C Technical Specifications
Table C-3
Pin Number
5
6
7
8
Note
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
Access Port Connector Pinouts (continued)
Function
BI_DD-
BI_DA-
BI_DC+
BI_DC-
"BI" stands for bi-directional, while DA, DB, DC and DD stand for "Data A", "Data
B", "Data C" and "Data D", respectively.
Network and Access Port Pinouts
C-3