Administrator’s Guide for Polycom HDX Systems
2–30 Polycom, Inc.
2 Configure these settings:
Setting Description
Enable ISDN
H.320
Allows this system to make H.320 (ISDN) calls.
Number of ISDN
Channels to
Dial in Parallel
Specifies how many channels to dial at one time.
You can specify up to 12 channels. If you experience network
problems, decrease the number.
Outside Line
Dialing Prefix
Specifies the ISDN dialing prefix used to call outside the
network.
Numbering
Plan
Select the appropriate numbering plan for your location, if it
differs from the default.
ISDN Voice
Algorithm
Specifies which voice algorithm (aLaw or uLaw) is used for
ISDN voice calls.
Do not change this setting unless you experience audio issues
in all ISDN voice calls.
ISDN Switch
Protocols
Specifies the protocol used by your network’s switch.
Auto BRI
Configuration
Allows the NI-1 or NI-2 switch to automatically configure the
directory numbers and SPIDs.
This setting is only available if you have selected the NI-1 or
NI-2 switch protocol.
Country,
Country Code
Displays the country selected as the system’s location and the
country code used for international calls to the system. To
specify the system’s location, go to System > Admin Settings
> General Settings > Location. The system automatically
supplies the country code when you specify the country.
Area Code Specifies the area code for this system’s location.
Directory
Numbers
Specifies the numbers assigned to the B1 and B2 channels for
each BRI line.
The two numbers for a line may be the same or different,
depending on the switch protocol in use.
Enable Specifies whether to enable the associated ISDN line.
If you selected Standard ETSI Euro-ISDN protocol, you must
enable all BRI lines that you expect to be active, and you must
not enable lines that will not be connected.
You may want to disable a particular line if there are problems
with the line that generate continuing error messages.
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