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D14049.03
MAY 2008
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TANDBERG VIDEO COMMUNICATIONS SERVER
ADMINISTRATOR GUIDE
Introduction Getting Started
Overview and
Status
System
Conguration
VCS
Conguration
Zones and
Neighbors
Call
Processing
Bandwidth
Control
Firewall
Traversal
Maintenance Appendices
Zones
UDP retry interval
Sets the frequency (in seconds) with which the
client will send a UDP probe to the traversal
server if a keep alive conrmation has not been
received.
UDP retry count
Sets the number of times the client will
attempt to send a UDP probe to the VCS
Expressway during call setup.
UDP keep alive interval
Sets the interval (in seconds) with which
the client will send a UDP probe to the VCS
Expressway once a call is established, in order
to keep the rewall’s NAT bindings open.
TCP retry interval
Sets the frequency (in
seconds ) with which the
traversal client will send a
TCP probe to the VCS during
call setup.
TCP retry count
Sets the number of times
the client will attempt to
send a TCP probe to the VCS
Expressway during call setup.
TCP keep alive interval
Sets the interval (in seconds)
with which the traversal client
will send a TCP probe to the
VCS once a call is in place,
in order to maintain the
rewall’s NAT bindings.
H.323 protocol
Determines the protocol (Assent or H.460.18)
to be used to traverse the rewall/NAT.
(See Firewall Traversal Protocols for more
information.)
H.460.19 demultiplexing Mode
Determines whether or not the same two ports
will be used for media by two or more calls.
On: all calls will use the same two ports.
Off: each call will use a separate pair of ports.
SIP port
Species the port on the local VCS Expressway
to be used for SIP calls to and from the
traversal client.
SIP transport
Determines which transport type will be used
for SIP calls to and from the traversal client.
Conguring Traversal Server Zones
SIP mode
Determines whether SIP calls will be allowed to
and from this zone.
H.323 mode
Determines whether H.323 calls will be allowed
to and from the traversal client.
H.323 port
Species the port on the local VCS to be used
for H.323 calls to and from the traversal client.
Client authentication
username
If the traversal client
is a VCS, this is
its Authentication
Username. If the
traversal client
is a TANDBERG
Gatekeeper, this is its
System Name.
There must
be an entry
in the
traversal server’s
Authentication
database for this
username. See
Authentication for
more information.
The default UDP and TCP probe retry
intervals are suitable for most
situations. However, if you experience
problems with NAT bindings timing out, they
may need to be changed.
For full details on how traversal client
zones and traversal server zones work
together to achieve rewall traversal,
see Firewall Traversal.