Cisco TelePresence Administrator's Manual page 458

Reference material
Command reference — xConfiguration
Zones Zone [1..1000] DNS IncludeAddressRecord: <On/Off>
Determines whether, if no NAPTR (SIP) or SRV (SIP and H.323) records have been found for the dialed alias via this zone, the VCS
will then query for A and AAAA DNS Records. Default: Off .
Example: xConfiguration Zones Zone 1 DNS IncludeAddressRecord: Off
Zones Zone [1..1000] DNS Interworking SIP Audio DefaultCodec: <G711u/G711a/G722_48/G722_56/
G722_64/G722_1_16/G722_1_24/G722_1_32/G722_1_48/G723_1/G728/G729/AACLD_48/AACLD_56/
AACLD_64/AMR>
Specifies which audio codec to use when empty INVITEs are not allowed. Default: G711u .
Example: xConfiguration Zones Zone 1 DNS Interworking SIP Audio DefaultCodec: G711u
Zones Zone [1..1000] DNS Interworking SIP EmptyInviteAllowed: <On/Off>
Controls if the VCS will generate a SIP INVITE message with no SDP to send to this zone. INVITEs with no SDP mean that the
destination device is asked to initiate the codec selection, and are used when the call has been interworked locally from H.323.
Default: On.
On: SIP INVITEs with no SDP will be generated and sent to this neighbor.
Off: SIP INVITEs will be generated and a pre-configured SDP will be inserted before the INVITEs are sent to this neighbor.
Example: xConfiguration Zones Zone 1 DNS Interworking SIP EmptyInviteAllowed: On
Zones Zone [1..1000] DNS Interworking SIP Video DefaultBitrate: <64..65535>
Specifies which video bit rate to use when empty INVITEs are not allowed. Default: 384 .
Example: xConfiguration Zones Zone 1 DNS Interworking SIP Video DefaultBitrate: 384
Zones Zone [1..1000] DNS Interworking SIP Video DefaultCodec: <None/H261/H263/H263p/H263pp/H264>
Specifies which video codec to use when empty INVITEs are not allowed. Default: H263 .
Example: xConfiguration Zones Zone 1 DNS Interworking SIP Video DefaultCodec: H263
Zones Zone [1..1000] DNS Interworking SIP Video DefaultResolution:
<None/QCIF/CIF/4CIF/SIF/4SIF/VGA/SVGA/XGA>
Specifies which video resolution to use when empty INVITEs are not allowed. Default: CIF .
Example: xConfiguration Zones Zone 1 DNS Interworking SIP Video DefaultResolution: CIF
Zones Zone [1..1000] DNS SIP Default Transport: <UDP/TCP/TLS>
Determines which transport type is used for SIP calls from the DNS zone, when DNS NAPTR records and SIP URI parameters do
not provide the preferred transport information. RFC 3263 suggests that UDP should be used. Default: UDP.
Example: xConfiguration Zones Zone [1..1000] DNS SIP Default Transport: UDP
Zones Zone [1..1000] DNS SIP Duo Video Filter Mode: <On/Off>
Determines whether INVITE requests sent to this zone filter out Duo Video. This option may be required to enable interoperability
with SIP devices that do not support Duo Video. Default: Off .
On: the second video line in any outgoing INVITE request is removed.
Off: INVITE requests are not modified.
Example: xConfiguration Zones Zone 1 DNS SIP Duo Video Filter Mode: Off
Zones Zone [1..1000] DNS SIP Media Encryption Mode: <Off/On/BestEffort/Auto>
The media encryption policy applied by the VCS for SIP calls (including interworked calls) to and from this zone. Default: Auto.
On: All media must be encrypted.
Off: All media must be unencrypted.
BestEffort: Use encryption if available otherwise fallback to unencrypted media.
Auto: No media encryption policy is applied.
Example: xConfiguration Zones Zone 1 DNS SIP Media Encryption Mode: Auto
Cisco VCS Administrator Guide (X8.1.1) Page 458 of 507