3Com 56K Command Reference Manual page 167

NVRAM Options
Record data software
flow control
Analog data
compression
Normal lines
Error control
Link rate select
Record data hardware
flow control
Data Set Ready
Remote Digital
Loopback (RDL)
Break handling
Stored telephone
number
Word length*
Parity*
DTE rate* (Kbps)
* Detected by each modem from the AT prefix of the &W command that
writes your defaults to NVRAM. Set your software to the desired word
length, parity, and serial port rate defaults before sending the modem the
AT... &W string.
Setting Description
&I0 Disabled
&K1 Enabled
&L0 Normal lines
&M4 Normal/error control
&N0 Variable
&R1 Disabled
&S0 Always on
&T5 Deny RDL
&Y1 Clear buffer, send immediately
&Z0-9=0 Blank
7
1 Even
9600 _
No Flow Control C-5