Other Parameters. Black Box MD1641A, MD1640A

CHAPTER 3: Software Configuration

This string selects the factory default parameters, then turns autoanswer off and stores that setting, along with all other current parameters, in nonvolatile memory. The &F9 command causes the modem to load the values from nonvolatile memory the next time it receives the &F command. You will use the same initialization string as before:

AT &F X4 ^M

But now the Modem will load the values stored in nonvolatile memory when you turn on the modem and when you issue the ATZ or AT&F reset commands.

Note: Because it clears the command buffer, you should not use ATZ in an initialization string.

3.4.2 Other Parameters

The default values for the other parameters in modem configuration menus rarely need changing. They typically include the dialing prefix

( ATDT for touch-tone service and ATDP for rotary service), the dialing suffix ( ^M ), the hang-up string ( +++ATH0^M ), and response messages

(RING, NO CARRIER, BUSY, etc.). Communications software with a host mode might also include an auto-answer string ( ATS0=1^M ).

3.5 Macintosh Initialization

Macintosh computers cannot use RTS/CTS hardware flow control without a serial cable wired for hardware control. The Macintosh 128 and 512 models cannot use RTS/CTS flow control at all. For those

Macintoshes turn off the default RTS/CTS hardware flow control, turn on XON/XOFF flow control and pacing, and ignore DTR:

AT &F X4 &E5 &E13 &D0 ^M

For hardware flow control, use the following initialization string:

AT &F X4 &E13 &D0 ^M

Add S0=0 to both strings to disable auto-answer if the Series II Modem is on a voice line.

31