Cisco 7940G Administration Guide

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Cisco Unified IP Phone 7960G/7940G Administration Guide for Cisco Unified Communications Manager 7.0 (SIP)
OL-15499-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Cisco Unified IP Phone
You can resolve these issues by isolating the voice traffic onto a separate VLAN. The switch port that
the phone is connected to would be configured to have separate VLANs for carrying:
• Voice traffic to and from the IP phone (auxiliary VLAN on the Cisco Catalyst 6000 series, for
example)
• Data traffic to and from the PC connected to the switch through the access port of the IP phone
(native VLAN)
Isolating the phones on a separate, auxiliary VLAN increases the quality of the voice traffic and allows
a large number of phones to be added to an existing network where there are not enough IP addresses
for each phone.
For more information, refer to the documentation included with a Cisco switch. You can also access
related documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/index.htm
Related Topics
• Understanding the Phone Startup Process, page 2-6
• Network and Access Ports, page 3-2
• Network Configuration Menu, page 4-4
Providing Power to the Cisco Unified IP Phone
The Cisco Unified IP Phone 7960G and 7940G can be powered with external power or with Power over
Ethernet (PoE). External power is provided through a separate power supply. PoE is provided by a switch
through the Ethernet cable attached to a phone.
Note When you install a phone that is powered with external power, connect the power supply to the phone
and to a power outlet before you connect the Ethernet cable to the phone. When you remove a phone that
is powered with external power, disconnect the Ethernet cable from the phone before you disconnect the
power supply.
The following sections provide more information about powering a phone:
• Power Guidelines, page 2-4
• Power Outage, page 2-4
• Obtaining Additional Information about Power, page 2-4

Cisco 7940G Specifications

General

Keypad number of keys	12
Touchscreen	-
Speakerphone	Yes
Voice codecs	G.711, G.729a
Bluetooth	No
Supported network protocols	DHCP, SCCP, SIP, MGCP
Ethernet LAN (RJ-45) ports	2
Input voltage	48 V
Dimensions (WxDxH)	266.7 x 152.4 x 203.2 mm
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Safety	(UL) 60950, (CSA) C22.2 No. 60950
Certification	CE (FCC) 15 (CFR 47) B ICES-003 B EN55022 B CISPR22 B AS/NZ 3548 B VCCI B EN55024 EN 50082-1 EN 61000-3-2 EN 61000-3-3 FCC 68 (CFR47) HAC IC CS-03
Compliance industry standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1Q
Lines quantity	- lines
Phonebook capacity	- entries
Number of handles included	1 pc(s)

Weight and Dimensions

Weight	1600 g