Cisco 7925G Administration Guide

For information about determining and changing TFTP server settings, see IP Network Settings, on page 92
or View Configuration File Name, on page 188.
IP Addressing and Routing
Problem
The IP addressing and routing fields may not be correctly configured.
Solution
Verify the IP addressing for the Cisco Unified Wireless IP Phone. If you are using DHCP, the DHCP server
should provide these values. If you have assigned a static IP address to the phone, you must enter these values
manually.
When the wireless IP phone loses the RF signal (goes out of the coverage area), the phone will not release
the DHCP server unless it reaches the timeout state.
Note
Check for these problems:
•
DHCP Server: If you have assigned a static IP address to the phone, you do not need to enter a value
for the DHCP Server option. If you are using a DHCP server, and the wireless IP phone gets a response
from the DHCP server, the information is automatically configured. See Troubleshooting Switch Port
Problems, available at this URL: http://www.cisco.com/en/US/products/hw/switches/ps708/products_
tech_note09186a008015bfd6.shtml.
•
IP Address, Subnet Mask, Primary Gateway: If you have assigned a static IP address to the phone, you
must configure settings for these options. See IP Network Settings, on page 92.
If you are using DHCP, check the IP addresses distributed by your DHCP server. Be aware of DHCP conflicts
and duplicate IP addresses. See Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise
Networks, available at this URL: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_
note09186a00800f0804.shtml.
For information about determining and changing IP addressing, see IP Network Settings, on page 92 .
DNS Settings
Problem
The phone has incorrect DNS server information.
Solution
If you are using DNS to refer to Cisco Unified Communications Manager, you must ensure that you have
specified a DNS server. You should also verify that there is a CNAME entry in the DNS server for the
Cisco Unified Communications Manager system.
You must also ensure that DNS is configured to do reverse look-ups. The default setting on Windows 2000
is to perform forward-only look-ups.
For information about determining and changing DNS settings, see IP Network Settings, on page 92.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
214
Troubleshooting
Phone Does Not Register with Cisco Unified Communications Manager

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