Cisco 7925G Administration Guide

Solution
Verify that the wireless configuration is correct. For example, check if the particular access point or switch
to which the phone is connected is down.
Related Topics
Site Survey Verification, on page 44
Intermittent Network Outages
Problem
Your network may be experiencing intermittent outages.
Solution
Intermittent network outages affect data and voice traffic differently. Your network might be experiencing
intermittent outages without detection. If so, data traffic can resend lost packets and verify that packets are
received and transmitted. However, voice traffic cannot recapture lost packets. Rather than retransmitting a
lost network connection, the phone resets and attempts to reconnect to the network. Contact the system
administrator for information on known problems in the voice network.
DHCP Settings Errors
Problem
The DHCP settings may be incorrect.
Solution
Try the following actions:
•
Verify that you have properly configured the phone to use DHCP. See Verify DHCP Setup, on page
229.
•
Verify that the DHCP server is set up properly.
•
Verify the DHCP lease duration. Cisco recommends that you set the lease duration to 8 days.
Voice VLAN Setup Errors
Problem
If the Cisco Unified Wireless IP Phone appears to reset during heavy network usage (for example, following
extensive web surfing on a computer connected to same access point and switch as phone), it is likely that
you do not have a voice VLAN or the appropriate QoS settings configured.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
216
Troubleshooting
Intermittent Network Outages

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