User`s guide

AT Commands and S-Registers
B-21
Issue 3 October 1995
Table B-1. AT Command and S-Register List (21 of 21)
AT Command/
S-Register
Description
%L LINE SIGNAL LEVEL
Returns a value indicating the received line signal in
dBm.
NOTE: This value is not sensed at the telephone line
connector.
%Q LINE SIGNAL QUALITY
Returns a value indicating the line signal quality. This
is the value checked for the %E1 or %E2 options.
+FCLASS? FAX/DATA MODE QUERY
Displays the fax or data mode expressed as a
number 0 (for data mode), or 1 (for Fax Class 1).
+FCLASS= n FAX/DATA MODE SET
Determines whether the modem operates in fax or
data mode.
n can be one of two values:
0 = Data
1 = Fax Class 1 (EIA/TIA 578)
+H n RPI TOGGLE
Determines whether Rockwell Protocol Interface
(RPI) processing is used. RPI uses WinRPI, running
on your PC, for error correction and data compression
services. The initialization string must include +H11
for WinRPI to function.
+H, +H0 Disable RPI.
+H11 Enable RPI.