X5.1 - Cisco TelePresence Administrator's Manual

The VCS now supports the interworking of DTMF events between SIP and H.323. This allows SIP devices
to dial into PIN protected conferences and to select conferences using the DTMF menu.
There are the following limitations:
4 Audio packets are dropped each time DTMF is interworked from H323 to SIP. This means that DTMF will
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only work if there are audio packets flowing from H323 to SIP.
The duration of events is not interworked, only fixed constants are supported.
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Encrypted calls to Microsoft OCS Server 2007
Encrypted calls to and from Microsoft OCS Server 2007 for both native SIP calls and calls interworked from
H323 are now supported. This feature is enabled by the Enhanced OCS Collaboration option key. Note
that as the VCS must process the media in both scenarios, a traversal call license is used.
Message waiting indication
The VCS now supports forwarding of unsolicited NOTIFY messages to registered endpoints. This allows
message waiting indication from CUCM to be forwarded to E20s thus allowing the indicator light to flash.
Ports
The VCS no longer listens on multicast/port 1718 when H.323 Gatekeeper Auto discover mode is set to
Off (this has the effect of disabling IGMP messages).
Call bandwidth
The maximum value for the default call bandwidth on a VCS has been increased from 2048 kbps to 65535
kbps.
Presence
Default timers for the Presence User Agent retry attempts have been increased to prevent resources being
consumed.
The default Subscription expiration time has increased from 300 to 3600 seconds.
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The default Publication expiration time has increased from 120 to 1800 seconds.
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The default PUA resend time (not configurable through the web interface) has increased from 5 to 1800
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seconds.

X5.1

Usability enhancements
Description fields for configuration items: a free-format description can be specified for the following
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configuration items: transforms, Allow List and Deny List patterns, search rules, subzone membership
rules. When viewing the summary list of these items the description is displayed as a mouse-over tooltip.
Enable and disable configuration items: transforms, search rules and subzone membership rules can
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be individually enabled and disabled. This makes it easier to make or test configuration changes.
Previously, configuration items would have to be deleted and re-created as necessary. The enabled or
disabled state is clearly shown on the summary list pages.
"Add suffix" and "add prefix" transform options: new pre-search transform pattern behavior options let
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you add a prefix or suffix to the matching alias. Previously, regular expressions would have been required
to do this.
Cisco VCS Administrator Guide (X7.1)
Reference material
Page 311 of 479