Setting Description Default Zone
types
SIP
encryption
mode
Determines whether or not the VCS allows encrypted SIP calls on this
zone.
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.
Auto Neighbor
SIP SDP
attribute line
limit mode
Determines whether requests containing SDP sent out to this zone have
the length of a=fmtp lines restricted.
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.
Off Neighbor
DNS
SIP SDP
attribute line
limit length
If SIP SDP attribute line limit mode is set to On, sets the maximum line
length of a=fmtp SDP lines.
130 Neighbor
DNS
SIP multipart
MIME strip
mode
Controls whether or not multipart MIME stripping is performed on requests
from this zone.
This option should normally be left as the default Off.
Off Neighbor
SIP UPDATE
strip mode
Controls whether or not the VCS strips the UPDATE method 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 do not support the UPDATE method in the Allow header, so for
these zones this should be set to On.
Off Neighbor
Interworking
SIP search
strategy
Determines how the VCS searches for SIP endpoints when interworking
an H.323 call.
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.
Options Neighbor
SIP
UDP/BFCP
filter mode
Determines whether INVITE requests sent to this zone filter out
UDP/BFCP. This option may be required to enable interoperability with SIP
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.
Off Neighbor
DNS
Cisco VCS Administrator Guide (X8.1.1) Page 153 of 507
Zones and neighbors
Configuring zones
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