Chapter 4 Gateway Configuration
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6. At “CO Line Index Base” input the starting number of the CO line display
number. For example if you set it as 1, when there is an incoming call from
port 1, the IP phones will display “Incoming Call CO 1” instead of the
extension number of the port, helping you to identify the CO lines being
used.
7. From “Jitter Buffer Depth” drop down menu, depending on your
bandwidth and CODEC, start with a Jitter Buffer with the minimum value.
Jitter Buffer will dynamically adjust its value according to the party you are
talking to and the bandwidth of the call but never below the value you
have set. The higher value of Jitter Buffer will reduce the chance of packet
loss during a call but might cause delays and the lower value will help to
transmit the voice packets faster but might cause packet loss problems.
8. Min. Loop Current Drop Time: Normally, when a telephone call terminates,
the telephone company sends a momentary drop in loop current to signal
the disconnect event. Please enter the minimum Loop Current Drop time in
this field to avoid the IP-PBX system detecting the disconnect signal
incorrectly. The value should not be too long or too short. Recommended
value is 400 ms.
NOTE
: If later on your needs grow and you need to add more ports into an
existing gateway, you will need to adjust the CO Line/SLT ports range. To
adjust the ports range, you will have to delete the existing gateway from the list
and create a new one.
External Paging & MOH Functions
If you connect a paging facility to your gateway, click the “External Paging
Enabled” check box to enable the Paging function. Assign a specific paging
code to be used for announcement via this gateway.
Using External Paging
If you assign “111” as the paging code of your VG5000, you need to dial “111”
to page a person via the external paging facility on this VG5000. Refer to
Chapter 2 Installing InterPBX Communication System/Configuring VG5000
Voice Gateway for more details.
Editing Analog Gateways
After the addition of the new gateway, you may edit the settings to control the
input and output volume of the CO Line and SLT ports.
