Polycom 1500/1800/2000/4000 manual Configured symmetrically

Defining ISDN/PSTN Network Services

Span Definition

Field	Description
Side	Select one of the following options:
	•	User side (default)
	•	Network side
	•	Symmetric side
	Note: If the PBX is configured on the network side, then the Collaboration
	Server unit must be configured as the user side, and vice versa, or both must be
	configured symmetrically.
Line Coding	Select the PRI line coding method from the list.
	• For T1 spans, default is B8ZS.
	• For E1 spans, default is HDB3.
Switch Type	Select the brand and revision level of switch equipment installed in the service
	provider’s central office.

• For T1 spans, default is AT&T 4ESS.

• For E1 spans, default is EURO ISDN.

Note: For T1 configurations in Taiwan, Framing must be set to ESF and Line Coding to B8ZS.

8Click Next.

The Phones dialog is displayed.

9To define dial-in number ranges click the Add button.

10The Add Phone Number dialog box opens.

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