Multitech MT128ISA-UD User Manual

This chapter describes how to make all the physical and software driver connec-

tions nescessary in order for your terminal adapter to operate in an ISDN environ-

ment. Before installing  your terminal adapter, check the package contents (see

section 1.2.1 in Chapter 1 for package contents list).
For an NT1 device (MT128ISA-UD or MT128ISA-UV adapter[s] only), order an

ISDN BRI line and get an Internet access account (if Internet access is required);

this is advisable to start your “environment” setup before actually installing your

ISDN adapter.

Before running the ISDN adapter, you need to get an ISDN BRI (Basic Rate Inter-

face) line from your local telephone company.  Sometimes, your ISP may, upon

your request, order an ISDN BRI line for you when you apply for an ISDN Inter-

net access account.  You should get the subscriber information from your ISDN

telephone company, who may inform you about your ISDN central switch type and

SPID (Service Profile Identifier) number (applicable in the United States).

The Service Profile ID (SPID) is applicable in the U.S. only.  SPIDs are a series of

numbers that informs the central office switch which services and features to pro-

vide to an ISDN device.  The generic SPID format comprises of 14 digits.  The

first 10 digits are the main telephone number on the terminal.  The last 4 digits are

dependent on the number of terminals on the interface and the services they sup-

port.

An ISDN Basic Rate (BRI) U-Loop is 2 conductors from the CO (telephone com-

pany central office) to the customer premises. The equipment on both sides of the

U-loop has to be carefully designed to deal with the long length of the U-loop and

the noisy environment it operates in. At the customer premises the U-loop is termi-

nated by an NT1 (network termination 1) device.  An NT1is a device which pro-

vides an interface between the two-wire twisted-pairs used by telephone companies