User manual

AT COMMAND SET
Section 4
4-20
Copyright (C) Dataplex Pty Ltd
AT&M Synchronous/Asynchronous MODE Selection
Parameters : 0 to 3
Default : 0 (Async)
The AT&M command selects asynchronous or synchronous terminal modes of operation.
This command also provides for the manual and automatic dialling of a stored number
under DTR control. See the AT&D command for actions taken on the fall of DTR.
AT&M0 - Asynchronous Mode 0. Type ATDnnn to dial.
AT&M1 - Synchronous Mode 1. DTR dial asynchronous. Enabling this Mode will cause
the modem to dial the number in location zero on raise of DTR. AT&Dn must
be correct.
AT&M2 - Synchronous Mode 2 (with asynchronous terminal dialling). Use an
asynchronous terminal to place the call and then change to Synchronous Mode
once the call is placed.
AT&M3 - Synchronous Mode 3. DTR dial synchronous. Enabling this mode will cause
the modem to dial the number stored in location zero on raise of DTR.
AT&N Display/Clear Dialling Directory
Parameters : None or 99
Default : None
AT&N will display the 10 telephone number storage locations with their contents. Any
numbers which require alteration can be updated individually with the ATNn&Z command.
The AT&N99 command erases all 10 locations.
AT&P PULSE Dial Make/Break Ratio
Parameters : 0,1
Default : 1 (CCITT Make/Break Ratio)
This command allows the user to select the pulse dialling make to break ratio.
AT&PO - Bell Make/Break Ratio (US setting).
AT&P1 - CCITT Make/Break Ratio (Australian setting).