APPENDIX B.
AT COMMAND SET
The BBI-14.4 modem is based upon the Rockwell RC144ACL chipset. This chipset contains
Rockwell's "AT" command set.
The RC144ACL is part of the family of RC96ACXXX/RC144XXX modem device set family. The
low power version is used in the BBI-14.4B and will support both facsimile and data operation at
14400 bits per second (bps).
The full Rockwell command set specification is available from Rockwell and is contained within their
document:
AT Command Reference Manual
for the RC144ACi,RC144ACL and
RC144ACG Modem Families.
Order No.883
Rev. 3, May 5, 1995
A summary of the Rockwell command set is provided on the following pages B-3 through B-6.
The revision of the Rockwell firmware within the BBI-14.4 is Telenetics Version 1.4T.
1.
BBI-14.4 Command Set Modifications
The BBI-14.4 contains a modified version of the standard Rockwell AT command set. These
modifications are as follows:
(a)
&DN
Modification
The &Dn command is configure in active profile 0 during Final System test, for &D0 so
that DTR is ignored (assumed ON)
(b)
&Cn Modification
The &Cn command is set for &C1 in Final System test (Carrier Detect will follow the
state of the carrier.
(c)
RTS/CTS
Modification
The &Rn command has been modified (Code Version 1.4T) to the following:
&R0 is set so that CTS will follow RTS. There is a CTS/RTS delay of 5ms to 100ms
with an RS232 interface and no delay with a TTL interface.
&R1 has not been changed; CTS is controlled by the flow control functions.
BBI-14.4 Installation, Operation & Diagnostics
Page B-1
