Cisco 7925G Administration Guide

Solution
By isolating the wireless phones on a separate auxiliary VLAN, you can use QoS to prioritize the voice traffic
over data traffic and improve the voice quality. See Voice QoS in Wireless Networks, on page 35 for details.
Phones Have Not Been Intentionally Reset
Problem
If you are not the only administrator with access to Cisco Unified Communications Manager, you should
verify that no one else has intentionally reset the phones.
Solution
You can check if a Cisco Unified IP Phone received a command from Cisco Unified Communications Manager
to reset by pressing Applications on the phone and choosing Administrator Settings > Status > Network
Statistics.
•
If the Restart Cause field displays Reset-Reset, the phone received a Reset/Reset from Cisco Unified
Communications Manager Administration.
•
If the Restart Cause field displays Reset-Restart, the phone reset because it received a Reset/Restart
from Cisco Unified Communications Manager Administration.
DNS or Other Connectivity Errors
Problem
The phone reset continues and you suspect DNS or other connectivity issues.
Solution
If the phone continues to reset, eliminate DNS or other connectivity errors. See Determine DNS or Connectivity
Issues, on page 229.
Audio Problems
When users report that active phone calls have poor voice quality that includes choppy audio, static or gaps
in audio, or no audio, use the information in this section to identify the cause of the problem.
Related Topics
Roaming and Voice Quality or Lost Connection Problems, on page 219
One-Way Audio or No Speech Path
Problem
One or more people on a call do not hear any audio.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
217
Troubleshooting
Phones Have Not Been Intentionally Reset

Cisco 7925G Specifications

General

Keypad number of keys	12
Display diagonal	2 \
Display resolution	176 x 220 pixels
Call waiting	Yes
Lines quantity	6 lines
Voice codecs	G.711a, G.722, G.729a, iLBC
Security algorithms	128-bit WEP, SSL/TLS, WPA
Supported network protocols	DHCP, TFTP, DNS, SCCP, SRST
Input voltage	100 - 240 V
Dimensions (WxDxH)	52 x 20 x 127 mm
Minimum system requirements	Cisco Unified Communications Manager 4.1, 4.2, 4.3, 5.1, 6.0, 6.1, 7.0 + Cisco Unified Communications Manager Express 4.3 +
Input frequency	50/60 Hz
Storage temperature (T-T)	-30 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Product type	IP Phone
Product color	Gray
Safety	UL 60950, CSA 22.2 No.60950, EN 60950, IEC 60950, AS/NZS 60950, IEC 60529 (IP 54)
Certification	47 CFR 15 B ICES-003 B EN 55022 B AS/NZS CISPR 22 B CISPR 22 B VCCI B EN 61000-3-2 EN 61000-3-3 KN 22 EN 55024 EN 50082-1 EN 61000-6-1 EN 300386 EN 60601-1-2 KN
Compliance industry standards	IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.1X, IEEE 802.11e

Weight and Dimensions

Weight	138 g