Specifications

Cisco Unified Wireless IP Phone 7921G Series Deployment Guide 69

• 802.11a mode will only scan 5 GHz channels and 802.11b/g mode will only scan 2.4 GHz channels, where it will then

attempt to associate to an access point if the configured network is available.

• For Auto-a and Auto-b/g modes, this is giving preference to one band over another. At power on, will scan all 2.4 and

5 GHz channels then attempt to associate to an access point for the configured network using the preferred band if

available. If the preferred band is not available, then the Cisco Unified Wireless Phone 7921G will try to use the less

preferred band if available. If the phone roams out of coverage of the preferred band, where the less preferred band

signal is available, then the phone will attempt to associate to that less preferred band.

• To extend battery life, ensure the call power save mode is configured for U-APSD/PS-POLL mode to utilize power

save mode during active calls.

• Active mode “None” may need to be used instead of U-APSD/PS-POLL if the access point does not support power

save enabled clients.

• As of the 1.3(3) release, the Prompt Mode feature can be optionally enabled. When enabled, the password will not be

stored in flash, but only in memory after entering manually after each power on sequence for seamless roaming.

However, the username can be stored after entering at the prompt, but can be overridden at the next login. If the

prompt is dismissed, then there is a “Login” softkey presented in order to invoke the login process. The Prompt Mode

feature is only supported with Network Profile 1. If multiple network profiles are enabled and Prompt Mode is

enabled, then the user would have to dismiss the login in order to switch to other enabled network profiles.

• Below are the available security modes supported and which key management and encryption types can be used for

each mode.

Security Mode

Key Management

Encryption

Open

N/A

Open+WEP

Static

WEP (40 or 128 bit)

Shared Key

Static

WEP (40 or 128 bit)

LEAP

802.1x, WPA, WPA2