2834A modem/telephone/ISDN Settings and Configuration

CONNECTIONS
Purpose	Location	Purpose	Location
Line out	CN1	AC power	CN4
Line in	CN2	Power switch	SW1
RS-232/422	CN3

AUTO FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] S43=n [cmds]
Example:	AT S43=13 <CR>
Default:	13
Range:	0 - 127
Unit:	ASCII
Description:	Set auto fallback character during MNP negotiation.
Notes	S43=0, disabled. S43=(1 - 127), enabled.

AUTO FALL FORWARD/FALLBACK
Type:	Configuration
Format:	AT [cmds] %Gn [cmds]
Example:	AT %G &W <CR>
Description:	Selects auto fallback in V.22bis and V.32 only.
Command	Function
» %G0	Fallback disabled.
%G1	Fallback enabled.

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Configuration
Format:	AT [cmds] %An [cmds]
Example:	AT%A0<CR>
Default:	13
Range:	0-127
Unit:	ASCII
Description:	Sets the character used as the auto-reliable fallback character. %A0 will disable this function.

AUTO-RELIABLE TIME BUFFER CONFIGURATION
Type:	Configuration
Format:	AT [cmds] \Cn [cmds]
Example:	AT \C0 &W<CR>
Description:	Controls the handling of incoming data during auto-reliable time period.
Command	Function
» \C0	Data is discarded.
\C1	Data is buffered.
\C2	Data is discarded, modem returns to normal mode on receiving auto-reliable fallback character.

AUTO-RETRAIN
Type:	Configuration
Format:	AT [cmds] %En [cmds]
Example:	AT %E0 <CR>
Description:	Selects auto-retrain mode.
Command	Function
%E0	Auto-retrain disabled.
» %E1	Auto-retrain enabled.

AUTO SLEEP TIMER
Format	AT [cmds] S46=n [cmds]
Example:	AT S46= 255<CR>
Default:	255
Range:	0 - 255
Unit:	.1 second
Description:	Maximum duration of DTE and DCE inactivity allowed prior to initiating low-power sleep mode.

BIT-MAPPED REGISTER S14
Format		AT [cmds] S14? [cmds]
Example:		ATS14?<CR>
Default:		Read only
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls echo, quiet mode, result codes, dial mode, and originate/answer mode.
Bit	Value		Meaning
0	0		Not used.
1	0 1		Command echo function disabled. Command echo function enabled.
2	0 1		Result code sending disabled. Result code sending enabled.
3	0 1		Numeric format enabled. Verbose format enabled.
4	0		Not used.
5	0 1		Tone dialing mode enabled. Pulse dialing mode enabled.
6	0 1		Result codes normal. Result codes disabled in answer mode.
7	0 1		Answer mode enabled. Originate mode enabled.

BIT-MAPPED REGISTER S40
Format		AT [cmds] S40=n [cmds]
Example:		AT S40=77 <CR>
Default:		77
Range:		0 - 127
Unit:		Bit-mapped
Description:		Controls active protocols and V.42 detection.
Bit	Value		Function
0	0 » 1		Automatic mode-detection disabled In originate mode, handshake begins at line speed designated by the S37 register. Modem can shift to a slower speed if necessary. In answer mode, handshake attempted with the following protocols in order - V.FC, V.32bis, V.32, V.22bis, V.22 or Bell 212, V.21, and Bell 103
5 - 1	00110		Not used.
6	0 » 1		V.42 detection disabled. V.42 detection enabled.

BIT-MAPPED REGISTER S44
Format		AT [cmds] S44=n [cmds]
Example:		AT S44=7 <CR>
Default:		7
Range:		0 - 23
Unit:		Bit-mapped
Description:		Selects V.42 status, V.42bis, and fallback.
Bit	Value		Function
0	0 » 1		V.42bis status disabled. V.42bis status enabled.
2, 1	00 01 10 » 11		V.42bis disabled. V.42bis when transmitting enabled. V.42bis when receiving enabled. V.42bis when transmitting/receiving enabled.
3	0		Not used.
4	» 0 1		Fallback disabled. Fallback enabled.
7, 6, 5	0		Not used.

BIT-MAPPED REGISTER S49
Type:	Register
Format:	AT [cmds] S49=n [cmds]
Example:	AT S49=255<CR>
Description:	Set maximum block size.
Command	Function
S49=64	Maximum MNP block size is 64 characters.
S49=127	Maximum MNP block size is 127 characters.
S49=191	Maximum MNP block size is 191 characters.
» S49=255	Maximum MNP block size is 255 characters.

BIT-MAPPED REGISTER S51
Format		AT [cmds] S51=n [cmds]
Example:		AT S51=40 <CR>
Default:		3
Range:		0 - 115
Unit:		Bit-mapped
Description:		selects flow control,
Bit	Value		Function
2, 1, 0	000 001 010 » 011		Flow control disabled. XON/XOFF flow control enabled. CTS flow control to DTE enabled. RTS/CTS flow control enabled.
3	0		Not used.
4	» 0 1		Flow control disabled. Flow control to XON/XOFF flow enabled.
5	» 0 1		Serial speed locked. Serial speed follows connect speed.
7, 6	» 00 01		XON/XOFF signals trapped by local modem. XON/XOFF passed through local modem.

BIT-MAPPED REGISTER S54
Format		AT [cmds] S54=n [cmds]
Example:		AT S54=69 <CR>
Default:		0
Range:		0 - 131
Unit:		Bit-mapped
Description:		Selects the communication protocol for data calls, and protocol result code.
Bit	Value		Function
0	» 0 1		B2 is enabled. B2 is not enabled.
1	» 0 1		B3 is enabled B3 is not enabled.
6 - 2	0		Not used.
7	» 0 1		Protocol result code disabled. Protocol result code enabled.

BREAK SEND
Type:	Configuration
Format:	AT [cmds] \Bn [cmds]
Example:	AT \B0 &W<CR>
Default:	0
Range:	1-9
Unit:	.1 second
Description:	Sends break to modem.

BREAK TYPE
Type:		Configuration
Format:		AT [cmds] \Kn [cmds]
Example:		AT \K1 <CR>
Description:		Configures action of break signal.
Command	Break from DTE Reliable/Normal mode		Break from DTE Direct mode	Modem receives \B	Break from remote modem
\K0	Enter command mode, do not send break to remote modem.		Send break to remote modem immediately, then enter command mode.	Buffers cleared and break sent to remote modem.	Buffers cleared and break sent to DTE.
\K1	Buffers cleared and break sent to remote modem.		Send break to remote modem immediately.	Buffers cleared and break sent to remote modem.	Buffers cleared and break sent to DTE.
\K2	Enter command mode, do not send break to remote modem.		Send break to remote modem immediately, then enter command mode.	Send break to remote modem immediately.	Send break to DTE immediately.
\K3	Send break to remote modem immediately.		Send break to remote modem immediately.	Send break to remote modem immediately.	Send break to DTE immediately.
\K4	Enter command mode, do not send break to remote modem.		Send break to remote modem immediately, then enter command mode.	Send break to remote modem with transmitted data.	Break sent with received data to the DTE.
» \K5	Send break with transmitted data.		Send break to remote modem immediately.	Send break to remote modem with transmitted data.	Break sent with received data to the DTE.

BTLZ STRING LENGTH
Type:	Register
Format:	AT [cmds] S58=n [cmds]
Example:	AT S58=32 <CR>
Default:	32
Range:	6 - 64
Unit:	Unidentified
Description:	Selects BTLZ string length.

CALLING TONE
Type:	Configuration
Format:	AT [cmds] -Cn [cmds]
Example:	AT -C0 &W<CR>
Description:	Controls whether the DTE will allow the modem to send a 1300Hz calling tone when originating.
Command	Function
» -C0	Disable calling tone.
-C1	Enable calling tone.

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Example:	AT %C0 <CR>
Description:	Selects data compression.
Command	Function
%C0	Data compression disabled.
» %C1	Data compression enabled.

CONNECT MESSAGE
Type:	Configuration
Format:	AT [cmds] S41=n [cmds]
Example:	AT S41=0<CR>
Description:	Controls CONNECT message.
Command	Function
» S41=0	CONNECT with DTE speed.
S41=1	CONNECT with carrier, protocol, and compression.
S41=2	CONNECT with DCE speed.

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Example:	AT \N0 DT555-1212<CR>
Description:	Sets connect mode.
Command	Function
\N0	Normal mode enabled.
\N1	Direct mode enabled.
\N2	Reliable mode enabled.
» \N3	Auto-reliable mode enabled.
\N4	LAPM mode enabled.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Example:	AT \V1 %C1<CR>
Description:	Selects extended result codes.
Command	Function
» \V0	Extended result codes disabled.
\V1	Extended result codes enabled.

FAX/DATA MODE
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Example:	AT S50=0 &W<CR>
Description:	Choose data or FAX mode.
Command	Function
» S50=0	Data mode enabled.
S50=1	FAX mode enabled.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] \Gn [cmds]
Example:	AT \G0 &K3<CR>
Description:	Selects modem port flow control.
Command	Function
» \G0	Flow control disabled.
\G1	Flow control enabled.

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Qn [cmds]
Example:	AT \Q0 A <CR>
Description:	Sets type of flow control used by modem.
Command	Function
\Q0	Flow control disabled.
\Q1	XON/XOFF flow control enabled.
\Q2	CTS flow control to DTE enabled.
» \Q3	RTS/CTS flow control enabled.

FLOW CONTROL TYPE
Type:	Register
Format:	AT [cmds] S52=n [cmds]
Example:	AT &G1 S52=0 <CR>
Description:	Sets type of flow control used by modem.
Command	Function
S52=0	Flow control disabled.
S52=1	Not used.
S52=2	Not used.
» S52=3	CTS/RTS flow control enabled.
S52=4	XON/XOFF pass-through flow control enabled.

INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] \Tn [cmds]
Example:	AT\T20<CR>
Default:	0
Range:	0-90
Unit:	1 minute
Description:	Sets the length of time that the modem does not receive information before it disconnects.

LOCAL SERIAL PORT SPEED
Type:	Register
Format:	AT [cmds] S72=n [cmds]
Example:	AT S72=0<CR>
Description:	Sets serial port speed.
Command	Function
» S72=0	Sets speed automatically.
S72=1	Sets 300bps speed.
S72=2	Sets 600bps speed.
S72=3	Sets 1200bps speed.
S72=4	Sets 2400bps speed.
S72=5	Sets 4800bps speed.
S72=6	Sets 7200bps speed.
S72=7	Sets 9600bps speed.
S72=8	Sets 12Kbps speed.
S72=9	Sets 14.4Kbps speed.
S72=10	Sets 16.8Kbps speed.
S72=11	Sets 19.2Kbps speed.
S72=12	Sets 21.6Kbps speed.
S72=13	Sets 24Kbps speed.
S72=14	Sets 26.4Kbps speed.
S72=15	Sets 28.8Kbps speed.
S72=16	Sets 38.4Kbps speed.
S72=17	Sets 57.6Kbps speed.
S72=18	Sets 115.2Kbps speed.

LOCK SERIAL PORT
Type:	Configuration
Format:	AT [cmds] \Jn [cmds]
Example:	AT \J0<CR>
Description:	Sets operation of serial port speed.
Command	Function
» \J0	Serial speed locked.
\J1	Serial speed follows connect speed.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Configuration
Format:	AT [cmds] \An [cmds]
Example:	AT \A3 %C1<CR>
Description:	Sets the maximum transmittable block size.
Command	Function
\A0	MNP block size is 64 characters.
\A1	MNP block size is 128 characters.
\A2	MNP block size is 192 characters.
» \A3	MNP block size is 256 characters.

MODEM OPERATING MODE
Type:	Register
Format:	AT [cmds] S53=n [cmds]
Example:	AT S53=3 <CR>
Description:	Sets connect mode.
Command	Function
S53=0	Normal mode enabled.
S53=1	Direct mode enabled.
S53=2	MNP reliable mode enabled.
» S53=3	Auto-reliable mode enabled.
S53=4	LAPM reliable mode enabled.

MNP OPTIONS
Type:	Register
Format:	AT [cmds] S59=n [cmds]
Example:	AT S59=0 <CR>
Description:	Selects MNP5 status.
Command	Function
S59=0	Data compression disabled.
» S59=1	Data compression enabled.

MNP STREAM/BLOCK MODE
Type:	Configuration
Format:	AT [cmds] \Ln [cmds]
Example:	AT \L1 DT555-1212<CR>
Description:	Selects the transfer mode for MNP.
Command	Function
\L0	Stream mode for MNP enabled.

V.32 AUTO-RETRAIN
Type:	Register
Format:	AT [cmds] S42=n [cmds]
Example:	AT S42=0 &W<CR>
Description:	Controls V.32 Auto-retrain.
Command	Function
S42=0	Auto-retrain disabled, hang up.
» S42=1	Auto-retrain on line quality problem enabled.
S42=2	Modem ignores line quality problems.

V.42 DETECTION PHASE
Type:	Configuration
Format:	AT [cmds] -Jn [cmds]
Example:	AT -J0 &W<CR>
Description:	Controls V.42 detection.
Command	Function
-J0	V.42 detection disabled.
» -J1	V.42 detection enabled.

V.42bis COMPRESSION CONTROL
Type:	Configuration
Format:	AT [cmds] "Hn [cmds]
Example:	AT "H0 &W<CR>
Description:	Controls V.42bis data compression
Command	Function
"H0	V.42bis disabled.
"H1	V.42bis when transmitting enabled.
"H2	V.42bis when receiving enabled.
» "H3	V.42bis when transmitting/receiving enabled.

V.42bis MAXIMUM STRING LENGTH
Type:	Immediate
Format:	AT [cmds] "On [cmds]
Example:	AT "O32 <CR>
Default:	32
Range:	6 - 250
Unit:	ASCII character
Description:	Selects string size for V.42bis compression.

XON/XOFF PASS-THROUGH
Type:	Configuration
Format:	AT [cmds] \Xn [cmds]
Example:	AT \X0 O<CR>
Description:	Selects whether XON/XOFF signals are sent to remote modem.
Command	Function
» \X0	XON/XOFF signals trapped by local modem.
\X1	XON/XOFF passed through local modem.