D-2
Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP and SIP)
OL-15790-01
Appendix D Technical Specifications
Cable Specifications
Cable Specifications
•
RJ-9 jack (4-conductor) for handset and headset connection.
•
RJ-45 jack for the LAN 10/100/1000BaseT connection (labeled 10/100/1000 SW).
•
RJ-45 jack for a second 10/100/1000BaseT compliant connection (labeled 10/100/1000 PC).
•
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
10/100/1000 SW
on the Cisco Unified IP Phone.
•
The access port is labeled
10/100/1000 PC
on the Cisco Unified IP Phone.
Network Port Connector
Table D-2
describes the network port connector pinouts.
Access Port Connector
Table D-3
describes the access port connector pinouts.
Table D-2
Network Port Connector Pinouts
Pin Number
Function
1
BI_DA+
2
BI_DA-
3
BI_DB+
4
BI_DC+
5
BI_DC-
6
BI_DB-
7
BI_DD+
8
BI_DD-
Note
“BI” stands for bi-directional, while DA, DB, DC and DD stand for “Data A”, “Data B”, “Data
C” and “Data D”, respectively.
Table D-3
Access Port Connector Pinouts
Pin Number
Function
1
BI_DB+
2
BI_DB-
3
BI_DA+
4
BI_DD+
5
BI_DD-