Cisco 7941G Troubleshooting And Maintenance

ExplanationSummary
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 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 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 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
Troubleshooting and Maintenance
18
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