Configuring Dialing Order Settings - Polycom V500 Administrator's Manual

Configuring Dialing Order Settings

One way to determine what your optimal call speeds should be is to select the
lowest call speed for each direction: upload and download. Try the call at that
speed and see how it looks. You can then keep increasing the call speeds and
checking the results until you find your optimal call speed for each direction.
Keep in mind, however, that optimal call speeds may vary at different times of day
depending on the traffic on the network. Also, if another system in the video call
cannot upload at the speed you specified, the call may suffer from poor video
quality or you may not be able to view video at all (black screen). Call speeds also
do not reflect additional IP overhead (such as timestamps) of approximately 20%.
5. Select to go to the Call Speeds screen and specify the call speeds to
make available to users, if you are allowing them to choose speeds on a
call-by-call basis.
If the call type on the home screen is set to a specific call type, the system does
not attempt to place the call using a different call type, even if other types are
listed in the Dialing Order.
You can configure the V500 system so that users can choose to place
IP-to-ISDN or ISDN-to-IP calls through a gateway.
To allow users to place an IP-to-ISDN call through a gateway:
1. Make sure the system is registered with a gatekeeper.
2. Go to System > Admin Settings > Network > Call Preference and select
Enable ISDN Gateway.
3. If you want to allow users to place IP-to-ISDN calls through a gateway
when calling from the directory, do one of the following:
— On the Network Dialing screen, set Preferred Dialing Method to
Auto and select ISDN Gateway as the first choice under Dialing
Order. With this configuration, calls placed from the directory will be
placed through a gateway first if an ISDN number exists.
— On the Network Dialing screen, set Preferred Dialing Method to
Manual. With this configuration, users can select ISDN Gateway
from the list of call types that appears when placing a call from the
directory.
Configuring Network Use
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