Cisco TelePresence Video Communication Server Administrator's Manual page 96

Setting Description
SIP Determines whether or not the VCS allows encrypted SIP
encryption calls on this 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.
However, this must be set to Microsoft for Microsoft Office
Communications Server (OCS) 2007 zones.
SIP SDP Determines whether requests containing SDP sent out to this
attribute line zone have 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 such as
Microsoft OCS 2007 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
attribute line maximum line length of a=fmtp SDP lines.
limit length
SIP multipart Controls whether or not multipart MIME stripping is performed
MIME strip on requests from this zone.
mode
This option should normally be left as the default Off.
However, it must be set to On for connections to a Microsoft
OCS 2007 Release 2 system.
SIP UPDATE Controls whether or not the VCS strips the UPDATE method
strip mode from the Allow 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 such as Microsoft OCS 2007 do not
support the UPDATE method in the Allow header, so for
these zones this should be set to On.
Cisco VCS Administrator Guide (X6.1)
Zones and neighbors
Default Applicable
to
Auto Neighbor
zones
Off Neighbor
zones
DNS
zones
130 Neighbor
zones
DNS
zones
Off Neighbor
zones
Off Neighbor
zones
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