Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

&M0 Selects direct asynchronous operation. The command sequence &M0\N0 selects normal

buffered mode, but the command sequence \N0&M0 selects direct mode. This is because the

\N0 command is analogous to the &Q6 command. The value 000b is written to S27 bits 3, 1,

and 0, respectively. (See &Q).

&M1 Selects synchronous connect mode with async off-line command mode. The value 001b is

written to S27 bits 3, 1, and 0, respectively. (Serial interface operation only.)

&M2 Selects synchronous connect mode with async off-line command mode. Same as &M1

except that &M2 enables DTR dialing of directory slot 0. The modem will disconnect if

DTR is OFF for more than the period in S25 (in units of hundredths of a second): the data

connection will be synchronous. The value 010b is written to S27 bits 3, 1, and 0,

respectively. (Serial interface operation only.)

&M3 Selects synchronous connect mode. This mode allows DTR to act as a talk/data switch. The

call is manually initiated while DTR is inactive. When DTR becomes active, the handshake

proceeds in originate or answer mode according to S14 bit 7. The value 011b is written to

S27 bits 3, 1, and 0, respectively. (Serial interface operation only.)

Result Codes:

OK n = 0 to 3.

ERROR Otherwise.

10.3.8 &Pn - Select Pulse Dial Make/Break Ratio

This command determines the make/break ratio used during pulse dialing. It is only effective if the

appropriate bit to enable this command is set through the ConfigurACE program. If enabled, it will

override the make/break ratios in the OEM parameters in ConfigurACE. The default is country-

dependent. The parameter value, if valid, is written to S28 bits 3 and 4.

&P0 Selects 39%-61% make/break ratio at 10 pulses per second. (Default.)

&P1 Selects 33%-67% make/break ratio at 10 pulses per second.

&P2 Selects 39%-61% make/break ratio at 20 pulses per second.

&P3 Selects 33%-67% make/break ratio at 20 pulses per second.

Result Codes:

OK n = 0 to 3.

ERROR Otherwise.

10.3.9 &Qn - Sync/Async Mode

This command is an extension of the &M command and is used to control the connection modes

permitted. It is used in conjunction with S36 and S48. (Also, see \N.)

Note: When the &Q0 to &Q3 command is issued to select the mode, the subsequent connect

message will report the DCE speed regardless of the W command and S95 settings.

&Q0 Selects direct asynchronous operation. The value 000b is written to S27 bits 3, 1, and 0,

respectively. See &M0.

&Q1 Selects synchronous connect mode with async off-line command mode. The value 001b is

written to S27 bits 3, 1, and 0, respectively. See &M1. (Serial interface operation only.)