NETGEAR XM128 ISDN manual Ordering Isdn Service, Spid Setup

Reference Guide for the Model XM128 ISDN Digital Modem

Not all the interfaces must exist in actual implementations. For example, not all houses are equipped with a PBX (NT2). In this case, the U interface is provided by the NT-1 device.

An ISDN terminal adapter can be constructed with the functionality of an NT-1 device. In this case, the terminal adapter connects directly to the U interface. The Model XM128 modem connects directly to a U interface without an NT-1 device, which can sometimes be quite expensive.

The Model XM128 modem comes with the following two different types of interfaces:

•An S/T interface

The Model XM128 modem with an S/T interface is called a Model XM128S modem and requires an NT-1 device to be connected between the modem and the ISDN wall connection.

•A U interface for American ISDN

The Model XM128 modem with a U interface is called a Model XM128U modem and can be connected directly to the ISDN jack installed by the telephone company.

SPID Setup

Service provider identification (SPID) numbers are needed unless your switch type is AT&T 5ESS with Point-to-Point Protocol. The ISDN switches use SPID numbers to represent the subscribed network services. Each SPID number corresponds to one terminal end point identifier. Different switches might provide different rules for the SPID number format. You should get the SPID number from your local telephone company.

Ordering ISDN Service

This section provides information about ordering an ISDN line from your telephone company. Follow these guidelines and use the information to fill in the appropriate worksheet in this appendix:

•Provide the following ISDN codes to the telephone company:

–S

–EZ-ISDN-1

Each code describes a set of capabilities and features that are available in the

Model XM128 modem. Providing these codes ensures that your ISDN line is installed for maximum compatibility.

G-4 ISDN Reference