Specifications

2-29
Cisco Unified Wireless IP Phone 7921G Administration Guide for Cisco Unified CallManager Release 4.1, 4.2, 5.0
OL-10802-02
Chapter 2 An Overview of the Voice Over IP Wireless Network
Voice Over IP Wireless Network Configuration
Table 2-8 explains and provides references for many of the configuration tasks for
the Cisco Aironet Access Point, controller, and Ethernet switch when setting up
VoIP on the WLAN.
Ta b l e 2-8 Checklist for Wireless Network Configuration
Tasks Explanation Reference
1. Check that the
Cisco
IOS version is the
recommended version
• Under System Software, check for
Cisco IOS version 12.3(8)JA or
later.
• For the controller, use Version 4.0
and Cisco IOS version 12.3(8)JX
or later.
Interacting with Cisco Unified
Wireless Access Points, page 2-12
2. Configure a VLAN
for voice
To isolate voice traffic and enable QoS,
you need a separate voice VLAN on the
access point and network switch.
Voice Quality in a Wireless
Network, page 2-16
3. Configure Service Set
Identifier (SSID) for
each VLAN
Identifier for a set of wireless devices
to communicate with each other.
Several access points can have the same
SSID to support a group of wireless
phones.
Interacting with Cisco Unified
Wireless Access Points, page 2-12
Cisco IOS Software Configuration
Guide for Cisco Aironet Access
Points, Cisco IOS Release
12.3(8)JA
4. Configure QoS
settings for VLANs
Create a QoS policy for the voice
VLAN and assign a higher CoS to voice
traffic.
Enable the QoS element for wireless IP
phones to provide channel utilization
(QBSS) information to phones.
Voice Quality in a Wireless
Network, page 2-16
Configuring the Wireless Network
for Voice, page 2-28
Cisco IOS Software Configuration
Guide for Cisco Aironet Access
Points, Cisco IOS Release
12.3(8)JA
5. Enable ARP caching Enable this option to ensure two-way
audio. The access point has ARP
caching disabled by default.
Cisco IOS Software Configuration
Guide for Cisco Aironet Access
Points, Cisco IOS Release
12.3(8)JA