Cisco 7925G Administration Guide

from Cisco Unified Communications Manager Administration to search for the phone based on its MAC
Address. To determine the MAC address of a phone, see Device Information, on page 179.
If the phone is already entered in the Cisco Unified Communications Manager database, its configuration file
may be damaged. See Configuration File Corruption, on page 215 for assistance.
Phone Cannot Connect to TFTP Server or to Cisco Unified Communications Manager
Problem
If the network is down between the phone and either the TFTP server or Cisco Unified Communications
Manager, the phone cannot start up properly.
Solution
Ensure that the network is currently running.
TFTP Server Settings
Problem
The TFTP server setting on the phone is incorrect.
Cause
The Cisco Unified Wireless IP Phone uses the TFTP server setting to identify the primary TFTP server to
use. If the TFTP server does not respond to the request, then the Communications Manager1 (CM1) shows
as TFTP_AS_CM if the phone has not registered with Cisco Unified Communications Manager before.
If the phone has previously registered with Cisco Unified Communications Manager, the Cisco Unified
Communications Manager list information is cached in memory. If TFTP fails, you must power cycle the
phone to connect to the TFTP server.
Note
The phone tries to create a TCP connection to the TFTP IP address and then to the gateway. If
Cisco Unified Communications Manager service is not running on the TFTP server, or if SRST is not running
on the gateway, the wireless IP phone may continually cycle while attempting to contact the identified
TFTP server.
The Cisco Unified Wireless IP Phone does not cache the IP information passed from the DHCP server, so the
TFTP request must be sent and responded to every time the phone power cycles.
Solution
If you have assigned a static IP address to the phone, you must manually enter this setting. See IP Network
Settings, on page 92.
If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check the
IP address configured in the DHCP server.
You can also enable the phone to use a static TFTP server. Such a setting is particularly useful if the phone
was recently moved from one location to another.
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
213
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