Cisco TelePresence Administrator's Manual page 153

Zones and neighbors
Setting Description
SIP Determines whether or not the VCS allows encrypted SIP calls on this
encryption zone.
mode
Auto: SIP calls are encrypted if a secure SIP transport (TLS) is used.
Microsoft: SIP calls are encrypted using MS-SRTP.
Off: SIP calls are never encrypted.
This option should normally be left as the default Auto.
SIP SDP Determines whether requests containing SDP sent out to this zone have
attribute line the length of a=fmtp lines restricted.
limit mode
On: the length is truncated to the maximum length specified by the SIP
SDP attribute line limit length setting.
Off: the length is not truncated.
The SIP SDP attribute line limit option should normally be left as the
default of Off. However, some systems cannot handle attribute lines longer
than 130 characters, so it must be set to On for connections to these
systems.
SIP SDP If SIP SDP attribute line limit mode is set to On, sets the maximum line
attribute line length of a=fmtp SDP lines.
limit length
SIP multipart Controls whether or not multipart MIME stripping is performed on requests
MIME strip from this zone.
mode
This option should normally be left as the default Off.
SIP UPDATE Controls whether or not the VCS strips the UPDATE method from the Allow
strip mode header of all requests and responses received from, and sent to, this zone.
This option should normally be left as the default Off. However, some
systems do not support the UPDATE method in the Allow header, so for
these zones this should be set to On.
Interworking Determines how the VCS searches for SIP endpoints when interworking
SIP search an H.323 call.
strategy
Options: the VCS sends an OPTIONS request.
Info: the VCS sends an INFO request.
This option should normally be left as the default Options. However, some
endpoints cannot respond to OPTIONS requests, so this must be set to Info
for such endpoints.
SIP Determines whether INVITE requests sent to this zone filter out
UDP/BFCP UDP/BFCP. This option may be required to enable interoperability with SIP
filter mode devices that do not support the UDP/BFCP protocol.
On: any media line referring to the UDP/BFCP protocol is replaced with
TCP/BFCP and disabled.
Off: INVITE requests are not modified.
Cisco VCS Administrator Guide (X8.1.1)
Configuring zones
Default Zone
types
Auto Neighbor
Off Neighbor
DNS
130 Neighbor
DNS
Off Neighbor
Off Neighbor
Options Neighbor
Off Neighbor
DNS
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