Cisco 7925G Administration Guide

Phone Does Not Ring
Problem
User complains that phone does not ring.
Solution
Check the phone settings:
•
To see if the phone is set to ring, choose Settings > Phone Settings > Sound Settings > Alert Pattern,
and check that a ring setting is selected.
•
To see if a ringtone has been set for the phone, choose Settings > Phone Settings > Ring Tone. If none
is set, add a ringtone for the phone.
•
To see if the speaker is functioning properly, adjust the ring volume settings to the highest level. Enable
keypad tones or call the phone to check the speaker.
Roaming and Voice Quality or Lost Connection Problems
If users report that when they are engaged in an active phone call and walking from one location to another
(roaming), the voice quality deteriorates or the connection is lost, use the information in this section to identify
the cause of the problem.
Related Topics
Audio Problems, on page 217
Voice Quality Deteriorates While Roaming
Problem
User complains that the voice quality deteriorates while roaming.
Solution
•
Check the RSSI on the destination access point to see if the signal strength is adequate. The next access
point should have an RSSI value of -67 dBm or greater.
•
Check the site survey to determine if the channel overlap is adequate for the phone and the access point
to hand off the call to the next access point before the signal is lost from the previous access point.
•
Check to see if noise or interference in the coverage area is too great.
•
Check that signal to noise ratio (SNR) levels are 25 dB or higher for acceptable voice quality.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
219
Troubleshooting
Phone Does Not Ring

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