Cisco's latest CCX version tackles Vo-Fi issues

NETWORK WORLD NEWSLETTER: JOANIE WEXLER ON WIRELESS IN THE
ENTERPRISE
07/13/05
Today's focus: Cisco's latest CCX version tackles Vo-Fi issues

Dear networking.world@gmail.com,

In this issue:

* Admission control, integrated QoS join CCX
* Links related to Wireless in the Enterprise
* Featured reader resource
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Today's focus: Cisco's latest CCX version tackles Vo-Fi issues

By Joanie Wexler

Cisco has been busy not only integrating its newly acquired
Airespace Wi-Fi product line with its existing Aironet products.
It has also been focusing on merging its VoIP capabilities with
wireless LANs.

As noted in the last newsletter, the company's 7920 Wi-Fi
handset was recently enhanced. In addition, Cisco officials say
that the latest release of Cisco Compatible Extensions software,
Release 4.0, is voice-centric.

The release is in CCX partners' hands now and is expected in the
commercial marketplace by year-end. CCX-v4 reduces handoff time
across access points, thereby decreasing latency, and extends
battery life, says Pat Calhoun, CTO in Cisco's Wireless
Networking Business Unit.

The CCX program is one in which suppliers of WLAN client devices
and chips license, at no charge, Cisco WLAN technology in a
specification. Participants implement all elements of the spec
and then have them tested for compliance and interoperability
with Cisco Wi-Fi infrastructure products at an independent test
lab. Calhoun says that about 90% of 802.11 silicon that ships
today is CCX-enabled.

At the network layer, Calhoun says, CCX-v4 has features to
integrate QoS across the wired and wireless sides of the network
in a consistent way. In addition, Call Admission Control (CAC)
is rolling into CCX v.4 "with all the tools for building a
complex IP telephony environment."

CAC capabilities will help manage a high density of users and
balance the load among access points, Calhoun explains.
"Admission control looks at the network as a whole, moving
phones [among] APs to balance and prioritize traffic," he
explains.

For expanded handset support, Cisco's CallManager IP PBX is
slated to support Session Initiation Protocol (SIP) on the line
side by year-end. Third-party handset makers that are starting
to offer 802.11-capable devices (such as Research In Motion and
Nokia) tend to support SIP-standard calling features, which
should expand the number of phone options users have on a Cisco
(or any other SIP-capable) 802.11 VoIP network.

RELATED EDITORIAL LINKS

Tips for VoWLAN deployment
Network World, 09/13/04
http://www.networkworld.com/nlwir3125

Users eye wireless voice/data unification
Network World, 06/20/05
http://www.networkworld.com/news/2005/062005-vowi-fi.html?rl

Wireless growth strategy
Network World, 07/11/05
http://www.networkworld.com/news/2005/071105-moseley.html?rl

Vendors tout WLAN security advances
Network World, 07/11/05
http://www.networkworld.com/nlwir3222
_______________________________________________________________
To contact: Joanie Wexler

Joanie Wexler is an independent networking technology
writer/editor in California's Silicon Valley who has spent most
of her career analyzing trends and news in the computer
networking industry. She welcomes your comments on the articles
published in this newsletter, as well as your ideas for future
article topics. Reach her at <mailto:joanie@jwexler.com>.
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