Cisco 6921 Administration Guide

C-3
Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24567-01
Appendix
Network and Access Port Pinouts
Access Port Connector
Table C-3 describes the access port connector pinouts.
Table C-3 Access Port Connector Pinouts
Pin Number Function
1BI_DB+
2BI_DB-
3BI_DA+
4BI_DD+
5BI_DD-
6BI_DA-
7BI_DC+
8BI_DC-
Note “BI” stands for bi-directional, while DA, DB, DC and
DD stand for “Data A”, “Data B”, “Data C” and “Data
D”, respectively.

Cisco 6921 Specifications

General

Brand	Cisco
Model	6921
Category	IP Phone
Language	English