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DCS-VIP Internet Keyphone
(Click the scrollbar to see other options.)
There are only three options that should be changed in this table.
Input Gain(
•
the VoIP card. Use the SYSTEM REBOOT option in the SYSTEM MANAGEMENT menu, se-
lect the VoIP option and click Set button to restart the card.)
Voice Volume – The optimum value is 4Db.
•
(These two options will only need to be changed from the default settings if the speech
quality is out of range.)
Jitter Buffer Size(#) – This should be set to the lowest value that is acceptable on yo ur
•
network. The optimum size is 7. If your network has a high jitter value, this setting may
need to be increased. This option cannot be changed while the VoIP card is in use.
This concludes the basic setup for the VoIP card. There are, however, some other areas of pro-
gramming to consider: how to access the VoIP trunks; how to set up routing for incoming calls;
and how to set up break-in and break-out options for VoIP to trunks.
How to Access VoIP Trunks
The simplest method is to put the four VoIP trunks into a trunk group; access will then be pos-
sible by dialling the trunk group number, as shown in the following display. Here, trunk group 80
has the four VoIP channels 881, 882, 883 and 884 as members.
Incoming VoIP calls follow the DDI table. In this example the defaults are used, with additional
routing of incoming digit '9' to trunk group 9.
*
) – The optimum value is –3Db. (After changing this option, you must restart
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