Cisco 6921 Administration Guide

C-2
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
Cable Specifications
Cable Specifications
• RJ-9 jack (4-conductor) for handset and headset connection.
• RJ-45 jack for the LAN 10/100BaseT connection (labeled 10/100 SW on the Cisco Unified
IP
Phone 6921, 6941, 6945, and 6961).
• RJ-45 jack for a second 10/100BaseT compliant connection (labeled 10/100 PC on the
Cisco
Unified IP Phone 6921, 6941, 6945, and 6961).
• 48-volt power connector.
Network and Access Port Pinouts
Although both the network and access ports are used for network connectivity, they serve different
purposes and have different port pinouts.
• The network port is labeled network on the Cisco Unified IP Phone.
• The access port is labeled Computer on the Cisco Unified IP Phone.
Network Port Connector
Table C-2 describes the network port connector pinouts.
Table C-2 Network Port Connector Pinouts
Pin Number Function
1BI_DA+
2BI_DA-
3BI_DB+
4BI_DC+
5BI_DC-
6BI_DB-
7BI_DD+
8BI_DD-
Note “BI” stands for bidirectional, 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