User guide

MTA128NT/ST Quick Start Guide

Data MSN

The Data MSN (multiple subscriber number) allows a caller to

specify an individual TA when more than one TA is connected to

you network terminator. If you don’t assign a value to the MSN,

the TA accepts all incoming calls. If you only assign a base

address to the MSN, the TA accepts any incoming call with the

same base address, regardless of whether a subaddress is

included. If you assign a base address and a

subaddress to the

MSN, the TA only accepts calls that match both the base

address and the subaddress. The following examples show the

syntax for setting the MSN with and without a subaddress.

AT command: !N1=

MSN with subaddress: 5551000:001 (base address is

5551000; subaddress is 001)

MSN without subaddress: (base address is 5551000)

Voice MSN

Selects calls on the voice channel in the same way the Data

MSN selects calls on the data channel.

AT command: *!N1=

SPIDs and DNs

The TA must be configured with the Service Profile Identifier

(SPID). The SPID is assigned by the local phone company and is

for the specific BRI line where the TA is attached. The SPID field

is empty prior to configuration.

AT commands: AT!C6= and AT*!C6=

Directory Number (DN) is the phone number another user calls

to contact this TA once it is attached to the ISDN.

AT commands: AT!N1= and AT*!N1=

Note:

SPIDs and DNs are used only by the U.S. NI-1, AT&T

5ESS, and DMS-100 switch types.