Owner`s manual

62-IWay Hopper

AT Commands/S-Registers

Dialing

To dial a number using AT commands, you must first start a data communications

program. In the programs terminal mode, type ATDxxxxxxx<CR>, where

xxxxxxx is the telephone number you want to dial, and <CR> is the carriage return

character that is sent when you press the ENTER key, e.g, ATD7853500<CR>.

The dial string can contain up to 80 characters.

To place an ML-PPP call, use an ampersand character (&) to join two telephone

numbers, e.g., ATD7853500&7853502<CR>. The telephone numbers can be the

same or different. Using this method, two B-channels are activated to transmit data

at an aggregate speed of 128K bps.

To make it easier to read the dial string, you can use hyphens, spaces or parenthe-

ses. These characters are ignored by the MTA128ST. For example, the

MTA128ST would read the following dial strings the same way:

ATD16127853500 <CR>

ATD 1-612-785-3500 <CR>

ATD 1 (612) 785-3500 <CR>

Channel Bundling Flag Dialing

The command AT&Jn is used to indicate whether outgoing calls should be made

on two B-channels by default. The command AT&J1&W0<CR>, configures the

MTA128ST to place a call dialing on two B-channels by default; if no second

number is given in the dial string, that single number is dialed twice. This is done

to compensate for the interworking issues with Windows 95. On the other hand, if

the user explicitly indicates two numbers in the dial string, then two numbers are

dialed (e.g., ATD7853500&7853502<CR>). The command AT&J0&W0<CR>,

disables automatic call bundling. Note other valid characters joining two tele-

phone numbers include a Plus Sign (+), and an Exclamation Mark (!).

* In Windows 95, if the Use Country Code and Area Code box is checked in the Prop-

erties window for dial-up connection, the bundling modifier (i.e., &, + or !) is removed

from the dialing string when the user attempts to make a connection. The solution is to not

check the Use Country Code and Area Code box, or to simply add the bundling dial

modifier to the phone number at the time of connection.