Multi-Tech Systems MTA128NT - Manual (Page 14)

Configuration Utilities
MTA128ST/NT 14
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.
Call Control Configuration
Persistent DTR Dialing _________________________
A high DTR (Data Terminal Ready) signal on the RS232/V.24 serial port indicates your computer or
terminal is ready to communicate with your TA. DTR normally goes high when a communication program
starts or is ready to dial. Persistent DTR dialing enables the TA to automatically redial the number stored in
memory location 0 whenever DTR is high and the serial port does not have an active call. You can enable
or disable this feature.
AT command: $D.
Auto Answer Data Calls _____ Rings to Answer ______
Select Auto Answer if you want your TA to automatically answer all incoming data calls (this option does
not affect the analog port). The Rings to Answer number, in the range of 1 to 255, selects the number of
rings the TA waits before answering an incoming call. The default is one ring.
AT command: S0=
Dialing Method _______________________________
Select either the Enbloc or the Overlap dialing method for use when establishing a data call. Your ISDN
provider determines the dialing method. The enbloc method is used for most ISDN dialing; however, you
can select the overlap method if you are working with a private network.
AT command: %A97=
Data Protocol ________________________________
The data protocol, also known as the B-channel protocol and the rate adaption protocol, is the
language
spoken over each 64 Kbps channel between two ISDN devices. The devices on both ends of the ISDN link
must use identical protocols.
AT command: !Z=
V.110 Protocol (some models only) — Used to connect slower, pre-ISDN communications devices to
high-speed ISDN lines. It handles rates up to only 38400 bps and is used mostly in Europe. The devices on
both ends of the link must be set to identical rates.