Name: Cisco 7975G
Brand: Cisco
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D-2

Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 6.0

OL-12642-01

Appendix D Technical 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.

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.

Cables 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 Cables have 4 pairs of wires for a total of 8

conductors.

Distance Requirements As supported by the Ethernet Specification, it is

assumed that the maximum cable length between each

Cisco

Unified IP Phone and the switch is 100 meters

(330

feet).

Table D-1 Physical and Operating Specifications (continued)

Specification Value or Range

Cisco 7975G Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Grey, Silver
Speakerphone	Yes
Voice codecs	G.711Mu, G.711a, G.722, G.729A, iLBC
Number of melodies	24
Aspect ratio	4:3
Display diagonal	5.6 \
Display resolution	320 x 240 pixels
Lines quantity	8 lines
Phonebook capacity	- entries
Number of VoIP accounts	-
Front camera	No
Security algorithms	128-bit AES
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	DHCP, TFTP
Volume control	Digital
Headphone outputs	1
Ethernet LAN (RJ-45) ports	2
Number of handles included	1 pc(s)
AC adapter output voltage	48 V
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Certification	FCC