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2.2 Programming
Parameter & Description
*
Gatekeeper Connection Checking Interval
(min) 0-1440min
Specifies the time (in minutes) between periodic
checks of connection to the gatekeeper.
When the primary gatekeeper fails, these checks can
detect the failure. In this case, the connection
automatically switches to the secondary gatekeeper if
it is available, so that the network remains functional.
*
Call Signaling Model
Specifies whether to carry out a call control (H.225)
process directly between the cards or through a
gatekeeper.
Direct call control is typically preferred because it
involves less network load.
Others
Parameter & Description
#
Fast Connect
Specifies the use of the Fast Connect feature.
Using Fast Connect simplifies the communication
process so that calls can be established quickly.
Generally, there is no need to change the default value.
Detailed Explanations
Gatekeeper
The following are the general functions of a gatekeeper:
•
Dialled number-to-IP address translation
•
Authentication
•
Bandwidth control
It is possible to employ a VoIP network without the use of a gatekeeper, because the card is
equipped with internal address translation capabilities. However, should the network contain
dozens of cards, maintenance of address translation tables in individual cards can become a
strain.
A gatekeeper is useful in this case, because with the gatekeeper it is possible to consolidate
the maintenance. (However, you still need to programme each card on the network with its own
address translation information. For details, refer to "2.2.6 Address Translation Table—GW
Entry" and "2.2.7 Address Translation Table—DN2IP Entry".) For more information about
gatekeeper functions, consult the documentation of the gatekeeper.
When using a gatekeeper, make sure to choose a compatible model. For more information
about gatekeeper compatibility with the card, consult a certified dealer.
16
Programming Guide
Default
Value Range
0
0 (disable),
1 to 1440
Direct
Direct,
Routed (via
Gatekeeper)
Default
Value Range
Use
Use,
Don't use
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