Multi-Tech Systems MTA128ST-USB - Manual (Page 22)

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MultiModemISDN User Guide
MTA128ST-USB
Network Configuration
Network Switch Type _____________________________
Select the network switch type your ISDN service provider uses at its local central office.
You can set the MTA128ST-USB to NET3 (DSS1), VN4, INS64, U.S. NI-1, AT&T 5ESS,
or DMS-100. If you don’t know the switch type, get the information from your ISDN
service provider. AT command: !C0=
Data TEI ________________________________________
Data TEI (Terminal Endpoint Identifier) is the TEI assigned to the data channel. You can
select Auto TEI, a fixed TEI, or Disable. A TEI is a number used by the central office
switch to uniquely identify each device connected to the network. When it uses dynamic
TEI assignments (Auto TEI), the central office switch assigns a TEI each time the unit
connects to the network. However, the ISDN service provider may assign a fixed TEI at
subscription time, in which case you must configure the unit with the fixed TEI number.
You can also disable the channel, which may be useful when multiple units are attached
to a network terminator bus. AT command: !D3=
Voice TEI ___________________________________
Voice TEI is the TEI assigned to the voice channel. Choices are: Auto TEI, a fixed TEI
number, or Disable. AT command: *!D3=.
Data MSN ___________________________________
The Data MSN (Multiple Subscriber Number) allows a caller to specify an individual
MTA128ST-USB when more than one unit is connected to your network terminator. If you
don’t assign a value to the MSN, the unit accepts all incoming calls. If you only assign a
base address to the MSN, the unit 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 unit 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: AT!N1=5551000:001 (base address is 5551000; subaddress is
001)
MSN without subaddress: AT!N1=5551000 (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 ______________________________
For use with North American switches, the Service Profile Identifier (SPID) must be
configured in the MTA128ST-USB. The SPID is assigned by the local phone company
and is for the specific BRI line where the unit 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 unit 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.