Panasonic KX-TDA0490 Getting Started page 87

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.
Default Value Range
0 0 (disable),
1 to 1440
Direct Direct,
Routed (via
Gatekeeper)
Default Value Range
Use Use,
Don't use
2.2 Programming
Programming Guide 17