Specifications

TD 92326GB
2009-03-10 / Ver. E
Installation and Operation Manual
VoIP Gateway
91
• Gatekeeper address
(primary)
If the gatekeeper is not to operate on its own VoIP
Gateway, a Remote gatekeeper address can be
configured.
• Gatekeeper address
(secondary)
It is important to enter an alternative gatekeeper IP
address, especially when using redundant systems.
• Mask Enter network mask.
• Gatekeeper Identifier In general, you can operate without Gatekeeper ID if
only one gatekeeper is operated in your network or if
Gatekeeper discovery is not used. See 19.1.2 The
Gatekeeper Identifier (ID) on page 135.
• Local Port Not used for SIP.
Authorization Use these settings if the VoIP Gateway (or the
gatekeeper contained therein) has to log on to another
gatekeeper.
• Password The Password corresponds to the H.235 password
required for logging on to the remote gatekeeper.
Alias list
• Name Define the H.323 name required to identify yourself
with the gatekeeper. This is the “Long name” on the
PBX Show area.
• Number Usually the gateway only registers with an H.323 name
and not with an E.164 address (i.e. with a telephone
number). Refer to the documentation for the
gatekeeper you want to register.
Media Properties
The configuration of the media properties is evaluated for calls from/to this
interface to/from a physical (ISDN, analog, TEST, ...) only. See 19.1.5 Voice
Transmission on page 137 for more information.
• General Coder
Preferences
The coder preference (Coder, Framesize
a
, Silence
Compression
b
) to be used if a non-local media address
is detected. If the preference is marked as exclusive no
other coder is offered.
• Local Network Coder The coder preference Coder, Framesize
a
, Silence
Compression
b
) to be used if a local media address is
detected.
• Enable T.38 Switches on Fax detection and switchover to T.38
• Enable SRTP enables encrypted media streams (SRTP). For perfect
privacy you must use encrypted signalling protocol (for
example SIPS) to hide exchange of SRTP keys
• No DTMF Detection DTMF tones are sent in-band through the media
channel but not as separate signalling messages.
• Enable PCM Enables the PCM switch (Pulse Code Manipulation).
Calls from one interface to another interface are then
handled directly over the ISDN PCM bus, which in turn
saves DSP channels.
• Enable T.38 Enables T.38 fax protocol, see 21.13 Routes from and to
Fax Machines on page 150.