AT Command Set and S-Registers
13-133980-A2-GB30-20 November 1996
Table 13-1
(11 of 11)
3800
Plus
AT Commands
AT Command Front Panel BranchDescription
\Q
n
Flow Control of DTE, Flow Control of Modem
Flow Flow
Control Control of
of DTE Modem
\Q0 Disable Disable
\Q1 XON/XOFF XON/XOFF
\Q2 CTS to DTE Disable
\Q3 CTS to DTE RTS to Mdm
\Q4 XON/XOFF Disable
\Q5 Disable XON/XOFF
\Q6 Disable RTS to Mdm
Configure\Edit\
V42/MNP/Buffer
\T
n
No Data Disconnect Timer
\T0 Disable.
\T
n
Where n is a value from 1 to 255 in 1-minute increments.
Configure\Edit\
Line Dialer
\X
n
XON/XOFF Passthrough Flow Control
\X0
Disable.
\X1 Enable.
Configure\Edit\
V42/MNP/Buffer
%A
n
Error Control Fallback Character
%A
n
Where
n
is an ASCII value from 0 to 127. Factory default is
013 ASCII.
Configure\Edit\
V42/MNP/Buffer
%C
n
MNP5 Data Compression
%C0 Disable.
%C1 Enable.
Configure\Edit\
V42/MNP/Buffer
IH
n
V.42bis Compression
IH0 Disable.
IH1 Transmit only. (Not available from DCP.)
IH2 Receive only. (Not available from DCP.)
IH3 Transmit and Receive. (Equivalent to Enabled option on DCP.)
Configure\Edit\
V42/MNP/Buffer
+FCLASS=
n
Service Class Selection
Normally set by fax software, Service Class Selection determines the fax
protocol. The command is sent to the modem in the format +FCLASS=
n
,
where
n
can be set to one of three values:
0=Data
1=Class 1 Fax (EIA 578)
2=Class 2 Fax (EIA/TIA SP-2388 dated 20 August 1990)
In the format +FCLASS?, the +FCLASS command returns the current
Service Class: 0, 1, or 2. In the format +FCLASS=?, the +FCLASS
command returns the Service Classes available: 0, 1, 2.
NOTE: Other fax commands supported by the 3800
Plus
modems are not
documented in this manual because they are not normally issued
by the user. They follow the EIA 578 and EIA/TIA SP-2388
specifications.
