Black Box MD1640A, MD1641A manual Manual Dial and Automatic Answer, Dialing/On-Line/Answering

CHAPTER 4: Manual Dial and Automatic Answer

4.Manual Dial and Automatic Answer

4.1Introduction

We’ll assume that yours is the very common application, where you are using a Series II Modem to dial up a remote computer. The Series II Modem has been factory preset for originating a call to a compatible 33,600 bps modem (also set up for hardware flow control, V.42 error correction, V.42bis data compression and CTS/RTS operation). If the answering modem is not set up similarly, the Modem automatically adjusts to the appropriate protocol.

4.2 Dialing/On-Line/Answering

There are several basic steps for “originating” and “answering” in data communication mode:

1.Load communication software

2.Dial

3.Establish On-Line connection

4.Terminate Call

A simple way to dial is from the keyboard of your computer or terminal. You enter a command on the keyboard to tell the Series II Modem to dial.

If you use a sophisticated communications software package, the software tells you to enter phone numbers and other information. If this is the case, the software, and not you, gives the dialing commands to the modem. All of the commands, option registers and intelligent features of the Series II Modem are taken care of by the software.

If you are giving commands directly to your modem (and not through your software), each command must begin with AT (ATtention Characters). AT characters may be entered in upper or lower case.

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