Polycom Audio and Video manual Select and configure these settings

	Chapter 3 - Configuring Network Use
Setting	Description
ISDN Voice	Enter which voice algorithm (Alaw or uLaw) you want to use for
Algorithm	ISDN voice calls.
	Do not change this setting unless you experience audio issues in
	all ISDN voice calls.
Auto BRI	Check this to allow the NI-1 switch to automatically configure the
Configuration	directory numbers and SPIDs.
	This setting is only available if you have selected the NI-1 switch
	protocol.

3.Select and configure these settings:

Setting	Description
Area Code	Enter the area code for this system’s location.
Directory Numbers	Enter the numbers assigned to the B1 and B2 channels for the
	BRI line.
	The two numbers for a line may be the same or different,
	depending on the switch protocol in use.
Enable	Check this to enable the ISDN line.
	If you selected the Standard ETSI Euro ISDN protocol, you must
	enable the BRI line.

The ISDN BRI Numbers screen also 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.

4.If you have configured the ISDN switch protocol to be AT&T 5ESS Multipoint,

NI-1, or Nortel DMS-100, select	and enter the ISDN BRI SPIDs provided
by your service provider.

After you enter the SPIDs, the system verifies them. If the system is unable to verify the SPIDs, make sure the system is connected and that the ISDN numbers you entered are correct.

If you do not have the SPIDs from your service provider, you can click Start to Auto-Detect SPIDs.

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