Cisco 7941G Administration Guide

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 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 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 switch
information at this URL:
http://cisco.com/en/US/products/hw/switches/index.html
Related Topics
Phone Startup Process, on page 36
Network Configuration Menu, on page 64
Cisco Unified IP Phone Power
The Cisco Unified IP Phones 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.
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.
Note
The following sections provide more information about powering a phone.
Power Guidelines
The following table provides guidelines for powering the Cisco Unified IP Phones.
Table 6: Power Guidelines for the Cisco Unified IP Phones
GuidelinesPower type
The Cisco Unified IP Phones 7941G, 7942G, 7961G, and 7962G use the
CP-PWR-CUBE-3 power supply
The Cisco Unified IP Phones 7941G-GE and 7961G-GE use the
CP-PWR-CUBE-3 external power supply only.
External power: Provided
through the CP-PWR-CUBE-3
external power supply.
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
33
Cisco Unified IP Phones and Your Network
Cisco Unified IP Phone Power

Cisco 7941G Specifications

General

Keypad number of keys	12
Touchscreen	-
Display resolution	320 x 222 pixels
Speakerphone	Yes
Voice codecs	G.729a
Bluetooth	No
Supported network protocols	DHCP, TFTP, SCCP, DSCP
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, IEC 60950, EN 60950, AS/NZS 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
Compliance industry standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1Q, IEEE 802.3af
Lines quantity	- lines
Phonebook capacity	- entries
Number of handles included	1 pc(s)

Weight and Dimensions

Weight	1600 g