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H.323
The
H.323
page allows you to enable and disable H.323 on the
VCS, and configure H.323-specific ports and settings.
To go to the
H.323
page:
•
VCS configuration > Protocols > H.323
To configure H.323 using the CLI:
xConfiguration H32
3
•
Enabling H.323
H.323 support is
On
by default.
To enable or disable H.323 on the VCS, use the
setting.
Configuring H.323 ports
The default VCS configuration uses standard port numbers so you
can use H.323 services out of the box without having to first set
these up.
You can configure the following H.323 ports:
Registration UDP port
The listening port for H.323 UDP registrations.
The default is 1719.
Call signaling TCP port
The listening port for H.323 call signaling.
The default is 1720.
Call signaling port range start
Specifies the lower port in the range to be used by H.323 calls
once they are established.
The default is 15000.
Call signaling port range end
Specifies the upper port in the range to be used by H.323 calls
once they are established.
The default is 19999.
The call signalling port range must be great enough to
!
support all the required concurrent calls.
Overview and
Introduction
Getting started
status
D14049.05
February 2009
Registration conflict mode
An H.323 endpoint may attempt to register with the VCS using an
alias that has already been registered on the VCS from another IP
address. The reasons for this could include:
•
two endpoints at different IP addresses are attempting to
register using the same alias
•
a single endpoint has previously registered using a particular
alias. The IP address allocated to the endpoint then changes,
and the endpoint is attempting to re-register using the same
alias.
You can determine how the VCS will behave in this situation by
H.323 Mode
configuring the
Registration conflict
•
Reject
: denies the new registration.
•
Overwrite
: deletes the original registration and replaces it with
the new registration.
The default is Reject.
System
VCS
Zones and
configuration
configuration
neighbors
Configuring H.323
mode. The options are:
Call
Bandwidth
processing
control
58
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Time to live
H.323 endpoints must periodically re-register with the VCS in
order to confirm that they are still functioning. The VCS allows
you to configure the interval (in seconds) between these re-
registrations, known as the
Time to
Live. The default is 1800.
Some older endpoints do not support the ability to
periodically re-register with the system. In this case, and
in any other situation where the system has not had a
confirmation from the endpoint within the specified period, it will
send an IRQ to the endpoint to verify that it is still functioning.
Call time to live
Once the endpoint is in a call, the VCS will periodically poll it to
confirm whether it is still in the call. If the endpoint does not
respond, the call will be disconnected.
The VCS allows you to configure the interval (in seconds) at which
the endpoints are polled, known as the
Call Time to
default is 120.
The system will poll endpoints in a call regardless of
whether the call type is traversal or non-traversal.
Auto discover
The VCS has an
Auto discover
setting which determines whether
it will respond to
Gatekeeper Discovery Requests
endpoints. The default is On.
To prevent H.323 endpoints being able to register automatically
with the VCS, set
Auto discover
to
Off.
This will mean that
endpoints will be able to register with the VCS only if they have
been configured with the VCS's IP address.
Firewall
Applications
Maintenance
traversal
ADMINISTRATOR GUIDE
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Appendices
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