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The following figure shows a typical WLAN topology that enables the wireless transmission of voice for
wireless IP telephony.
Figure 7: WLAN with Cisco Desktop Collaboration Experience
When a Cisco Desktop Collaboration Experience powers on, it searches for and becomes associated with an
AP if the phone wireless access is set to On. If remembered networks are not within range, you can select a
broadcasted network or manually add a network.
The AP uses the connection to the wired network to transmit data and voice packets to and from the switches
and routers. Voice signaling is transmitted to the Cisco Unified Communications Manager server for call
processing and routing.
APs are critical components in a WLAN because they provide the wireless links or hot spots to the network.
Cisco requires that APs that support voice communications use Cisco IOS Release 12.4(21a)JY or later. Cisco
IOS software provides features for managing voice traffic. For more information about APs, see the
Series Wireless LAN Deployment Guide
.
In some WLANs, each AP has a wired connection to an Ethernet switch, such as a Cisco Catalyst 3750, that
is configured on a LAN. The switch provides access to gateways and the Cisco Unified Communications
Manager server to support wireless IP telephony.
Some networks contain wired components that support wireless components. The wired components can
comprise switches, routers, and bridges with special modules to enable wireless capability.
For more information about Cisco Unified Wireless Networks, see
http://www.cisco.com/en/US/products/
WLAN Standards and Technologies
This section describes WLAN standards and technology.
Cisco Desktop Collaboration Experience DX650 Administration Guide, Release 10.1(1)
74
WLAN Standards and Technologies
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