Isdn line information – Cabletron Systems Cabletron CyberSWITCH CSX400 User Manual

Page 45

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Planning for CSX400 ISDN Configuration

CSX400 and CSX400-DC User’s Guide 31

ISDN Line Information

You need to know the telephone switch type and phone numbers associated with the ISDN line.
The telephone switch types supported are listed in

Telephone Switch Support

. The service

provider gives you up to three sets of numbers for identifying the ISDN line and attached devices.
You may be assigned none, one or two SPIDs or DNs and this varies by service provider and
country.

Phone Numbers —

Numbers used for others to dial into the ISDN B channels on your ISDN line

(similar to analog line phone numbers).

Directory Numbers —

Address assigned by the ISDN service provider for each device operating

on the line. This number can be similar to the phone number. The Directory Number is not
generally implemented outside the U.S.

Service Profile Identifications —

SPIDs, also assigned by the ISDN service provider, identify

the services and features that the switch provides to the ISDN device. Commonly implemented in
the U.S. and Canada, the SPID is often derived from the directory number, combined in a series
with other digits as shown in the example in

Figure 4

. SPIDs are not generally implemented

outside of the U.S. and Canada.

Figure 4

Service Profile Identifications (SPIDs)

Refer to

Chapter 3,

ISDN Line Ordering and Configuration,

for further information about

ISDN configurations and line ordering.

CSX400

EXAMPLES:
NORTHERN TELECOM DMS-100 SWITCH