Cable Specifications
Table D-1
Specification
Cables
Distance Requirements As supported by the Ethernet Specification, it is
Cable Specifications
•
•
•
•
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.
•
•
Network Port Connector
Table D-2
Table D-2
Pin Number
1
2
3
4
5
6
7
8
Note
Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 6.0
D-2
Physical and Operating Specifications (continued)
Value or Range
Category 3/5/5e/6 for 10-Mbps cables with 4 pairs
Category 5/5e/6 for 100-Mbps cables with 4 pairs
Category 5e/6 for 1000-Mbps cables with 4 pairs
Note
assumed that the maximum cable length between each
Cisco Unified IP Phone and the switch is 100 meters
(330 feet).
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.
The network port is labeled
The access port is labeled
describes the network port connector pinouts.
Network Port Connector Pinouts
Function
BI_DA+
BI_DA-
BI_DB+
BI_DC+
BI_DC-
BI_DB-
BI_DD+
BI_DD-
"BI" stands for bi-directional, while DA, DB, DC and DD stand for
"Data A", "Data B", "Data C" and "Data D", respectively.
Cables have 4 pairs of wires for a total of 8
conductors.
on the Cisco Unified IP Phone.
10/100/1000 SW
on the Cisco Unified IP Phone.
10/100/1000 PC
Appendix D
Technical Specifications
OL-12642-01