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PN 88300150
connected via pin 20 of the RS232 interface. In DTR Dialing, the modem dials a stored number as soon
as it receives a high DTR signal. The DTR Dialing method is popular when using the modem in
synchronous applications.
To activate DTR Dialing, type the command AT$D1 and hit ENTER. The modem now dials the phone
number stored as N0 when it receives a high DTR signal (see the D...N command in Chapter 4). DTR
must remain high for the duration of the call, until disconnect. To deactivate DTR Dialing, type the
command AT$D0 (or AT$D) and hit ENTER.
When you use DTR Dialing, be sure that DIP-Switch #1 is in the UP position, so that DTR is not forced
on.
In addition, when using DTR Dialing in a synchronous application, be sure that DIP-Switch #8 is in the UP
position to disable V.25bis Command Mode.
ITU-T V.25bis Country Specific Information
Due to the flexibility of the V.25bis standard, each country may establish specific regulations governing
the way operations are handled. The purpose of this document is to detail each country's specific
regulations that affect operation of V.25bis in Multi-Tech modems.
1. Italy
a) Command/Indication modifications
1. Phone number indications include status; ZPSTTT
a) Z - U, D, or F, for Unrestricted, Delayed or Forbidden
b) P - Delay time if delayed
c) S - Number of retries so far
d) TTT - Interdiction time to further attempts
2. Modify RLN command to allow memory parameter
a) RLNmm is now valid to list one number in memory
3. PRN and CLA commands do not work on active memory locations
a) Active number are ones who are on the delay or forbidden lists
4. Added dialing digit '<' to indicate 2 second pause
b) Delayed and Forbidden list behavior
1. 5 retries without delay
2. 2 minute delay between next 4 retries
3. After 9 retries the number is put on the forbidden list
4. 120 minute timer is started on entry to delay list
5. When it runs out, the number is removed from whichever list it is on
c) Auto-Answer mode behavior
1.
Auto-Answer in 5 seconds if no DIC
2. Get 10 seconds after DIC to enter CIC
3. If 10 seconds times out then no connection is possible
4/3/01
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