Cisco 7941G Administration Guide

ExplanationSummary
By default, the network configuration options are locked to prevent
users from making changes that could impact their network
connectivity. You must unlock the network configuration options
before you can configure them. See Unlock and Lock Options, on
page 60 for details.
Changing the telephone configuration
The phone resets when it loses contact with the Cisco
Unified Communications Manager software. This lost connection
can be due to any network connectivity disruption, including cable
breaks, switch outages, and switch reboots.
Phone resetting
The RxType and the TxType statistics show the codec that is being
used for a conversation between this Cisco Unified IP phone and
the other device. The values of these statistics should match. If they
do not, verify that the other device can handle the codec
conversation, or that a transcoder is in place to handle the service.
See Call Statistics Screen, on page 184 for information about
displaying these statistics.
Codec mismatch between the phone
and another device
The RxSize and the TxSize statistics show the size of the voice
packets that are being used in a conversation between this Cisco
Unified IP phone and the other device. The values of these statistics
should match.
See Call Statistics Screen, on page 184 for information about
displaying these statistics.
Sound sample mismatch between the
phone and another device
Check the AvgJtr and the MaxJtr statistics. A large variance between
these statistics might indicate a problem with jitter on the network
or periodic high rates of network activity.
See Call Statistics Screen, on page 184 for information about
displaying these statistics.
Gaps in voice calls
A loopback condition can occur when the following conditions are
met:
•
The SW Port Configuration option in the Network
Configuration menu on the phone is set to 10 Half (10-BaseT
/ half duplex)
•
The phone receives power from an external power supply
•
The phone is powered down or the power supply is
disconnected
In this case, the switch port on the phone can become disabled and
the following message appears in the switch console log:
HALF_DUX_COLLISION_EXCEED_THRESHOLD
To resolve this problem, re-enable the port from the switch.
Loopback condition
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)
227
Troubleshooting and Maintenance
General Troubleshooting Information

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