Boca HOME OFFICE, User Manual

Page: 36 / 70

36
H
OME
/O
FFICE
M
ODEM
Note on Flow Control. XON/XOFF is a software-based flow control
method, using standard ASCII control characters to pause or resume
data transmission. RTS/CTS pacing, a hardware-based method, uses
an electrical signal. Signals are exchanged as follows:
RECEIVER TRANSMITTER
CTS ON START SENDING
CTS ON RTS ON (ready to send)
CTS OFF RTS OFF (stop sending)
Command Description
Select pulse dial make/break ratio
AT&P0 Selects a make/break ratio of 39/61 at 10pps.
US and Canada. (default)
AT&P1 Selects a make/break ratio of 33/67 at 10pps.
UK and Hong Kong.
AT&P2 Same as 0 except at 20pps.
AT&P3 Same as 1 except at 20pps.
Asynchronous mode
AT&Q0 Direct Asynchronous mode.
AT&Q5 Modem negotiates an error-corrected link.
(default)
AT&Q6 Selects asynchronous operation in normal mode
(i.e. speed buffering).
RTS/CTS (Request to Send/Clear to Send)
AT&R0 Not supported.
AT&R1 CTS will drop if required by flow control (default).
Data Set Ready (DSR) signal
AT&S0 Causes DSR signal to be active at all times.
(default)
AT&S1 Causes DSR signal to be active according to the
CCITT specification.
ç
è
è
HOMEOFF.PM6 5/9/97, 9:15 AM 36