Diamond SupraExpress 56e Manual page 59

&K4 Enable software (XON/XOFF) flow control.
&K5 Enable transparent software flow control.
&K6 Software (XON/XOFF) and hardware (RTS/CTS) flow control.
&P Pulse Dialing Make/Break Ratio
(Valid only as per country code.)
39%/61% make/break ratio at 10PPS (US and Canada default)
&PØ
&P1 33%/67% make/break ratio at 10PPS (UK and Hong Kong)
&P2 39%/61% make/break ratio at 20PPS
&P3 33%/67% make/break ratio at 20PPS (Japan)
&Q Asynchronous/Synchronous Mode Selection
Default depends on AT&F. Not all modems support synchronous mode.
&QØ Asynchronous Direct mode.
&Q1 Synchronous Mode 1 (Terminal must support both modes.) Call placed Async, modem
switches to Sync. When DTR is dropped, modem returns to Async.
&Q2 Synchronous Mode 2. Modem dials number in stored location Ø when DTR goes from
Low to High.
&Q3 Synchronous Mode 3. Dial number manually on a telephone, and then bring DTR
High to let the modems connect.
&Q4 Not used.
&Q5 Asynchronous Reliable mode (most common default).
&Q6 Asynchronous Normal mode.
CAUTION — These settings will prevent most Mac OS machines from being able to
communicate with the modem.
Once you enter &Q(1-3) and save it to memory, there are only three ways to return to
Asynchronous Mode:
1 Issue AT &Q(0,5-6) &W from a Synchronous Terminal to restore the modem to Asynchronous
Mode.
2 Connect modem to an Asynchronous Terminal with the DTR signal (line 20) disabled (a
break-out box works for this) and issue the configuration you want or AT &Q(0,5-6) &W to
return the modem to Async Mode.
3 Send the modem to Diamond for repair.
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