Cisco 7925G Deployment Guide

Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Deployment Guide
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Cisco Centralized Key Management (CCKM)
CCKM is the recommended deployment model for all environment types where frequent roaming occurs.
CCKM enables fast secure roaming and limits the off-network time to keep audio gaps at a minimum when on call.
802.1x authentication is required in order to utilize CCKM.
802.1x without CCKM can introduce delay during roaming due to its requirement for full re-authentication. WPA and WPA2
introduce additional transient keys and can lengthen roaming time.
CCKM centralizes the key management and reduces the number of key exchanges.
When CCKM is utilized, roaming times can be reduced from 400-500 ms to less than 100 ms, where that transition time from
one access point to another will not be audible to the user.
As of the 1.3(4) release, the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G support CCKM with WPA2 (AES
or TKIP), WPA (TKIP or AES) and 802.1x (WEP) authentication.
EAP Type
Key Management
Encryption
EAP-FAST
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
EAP-TLS
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
PEAP
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
LEAP
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
AKM
802.1x, WPA, WPA2
AES, TKIP, WEP (40/64 or 104/128 bit)
CCKM was not supported with WPA2 in release 1.3(3) or earlier.
WPA Version
Cipher
Supported
WPA
TKIP
Yes
AES
1.3(4) and later
WPA2
TKIP
1.3(4) and later
AES
1.3(4) and later
EAP and User Database Compatibility
The following chart displays the EAP and database configurations supported by the Cisco Unified Wireless IP Phone 7925G,
7925G-EX, and 7926G.
Database Type
LEAP
EAP-FAST
(Phase Zero)
EAP-TLS
PEAP
(MS-CHAPv2)
Cisco ACS
Yes
Yes
Yes
Yes

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