V.34R modem/telephone/ISDN Settings and Configuration

Card Type	Modem (synchronous/asynchronous)
Chip Set	Motorola
Maximum Data Rate	28.8Kbps
Maximum Fax Rate	14.4Kbps
Data Bus	Serial
Fax Class	Class I
Data Modulation Protocol	Bell 103A, 212A ITU-T V.17, V.21, V.22, V.22bis, V.27bis, V.29, V.32, V.32bis, V.33, V.34
Fax Modulation Protocol	ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis

CONNECTIONS
Function	Label	Function	Label
AC power in	CN1	Line in	CN4
Serial port	CN2	Power switch	SW1
Line out	CN3	Talk/Data button	SW2

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
CD	Red	On	Carrier signal detected or error correction negotiation completed
CD	Red	Off	Carrier signal not detected
TD	Red	On	Modem is transmitting data
TD	Red	Off	Modem is not transmitting data
RD	Red	On	Modem is receiving data
RD	Red	Off	Modem is not receiving data
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
CS	Red	On	CTS signal is high
CS	Red	Off	CTS signal is low
RS	Red	On	RTS signal is high
RS	Red	Off	RTS signal is low
Note: The function of the TALK LED is unidentified.

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, D, E, L, M, O, Q, V, W, X, Y, Z

&D, &F, &G, &P, &V, &W, &X, &Y

Extended AT Commands

\V

%E

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S22, S23, S25, S26

V.25bis Commands

The V.25bis command set is unidentified.

Note: See MHI documentation for complete information.

AUTO-ANSWER OVERRIDE
Type:	Immediate
Format:	AT [cmds] *IC [cmds]
Description:	Instructs the modem to ignore the incoming call, if the modem is set to automatically answer.

AUTO-DIAL STORED NUMBER
Type:	Configuration
Format:	AT [cmds] *AUn [cmds]
Description:	Sets the auto-dialing function to dial the number stored in memory location n.

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] S64=n [cmds]
Default:	13
Range:	0-127
Unit:	ASCII
Description:	Sets the character used as the auto-reliable fallback character. S64=0 will disable this function.

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Default:		132
Range:		0 - 255
Description:		Controls low DTR action, DCD signal, and the Long Space Disconnect function.
Note:		Be aware that the bits are out of order.
Bit	Value	Function
6, 0	í 00 01 10 11	DSR forced high. DSR normal, except forced low on disconnect. DSR normal. DSR follows OH.
5, 1	í 00 01 10 11	CD forced high. CD forced high except during disconnect. CD normal. CD follows remote RTS signal.
2	0 í 1	CTS normal. CTS forced high.
4, 3	í 00 01 10 11	DTR signal ignored. Modem goes to command mode on low DTR. Modem disconnects on low DTR. Modem resets on low DTR.
7	0 í 1	Long Space Disconnect function disabled. Long Space Disconnect function enabled.

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27=n [cmds]
Default:		9
Range:		0 - 127
Description:		Selects sync/async mode, line type, clock source, and ITU-T/Bell modes.
Bit	Value	Function
1, 0	00 01 í 10 11	Asynchronous command and data modes. Asynchronous command, synchronous connect mode. DTR dialing enabled, synchronous connect mode. Manual dialing only, synchronous connect mode.
2	í 0 1	Switched line. Leased line.
3	0	Not used.
5, 4	í 00 01 10	Internal DTE transmit clock source. External DTE transmit clock source. Slave DTE transmit clock source.
6	í 0 1	DTR dialing enabled. DTR dialing disabled.

BIT-MAPPED REGISTER S29
Format		AT [cmds] S29=n [cmds]
Default:		0
Range:		0 - 135
Description:		Controls command set, option retaining, V.32 fast handshaking, and DTE fallback.
Bit	Value	Function
0	í 0 1	AT command set enabled. AT command set disabled.
1	í 0 1	Modem will not reset on disconnect. Modem will reset on disconnect.
2	í 0 1	Normal V.32 handshake sequence. Training time is shortened by 2 seconds in V.32 and V.32bis modes.
6 - 3	0000	Not used.
7	í 0 1	DTR dialing enabled. DTR dialing disabled.

BIT-MAPPED REGISTER S57
Format:			AT [cmds] S57=n [cmds]
Default:			0
Range:			0 - 33
Description:			Controls result code format and busy out.
Bit	Value			Function
0	í 0 1			Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard). Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola).
4 - 1		0000			Not used.
5		í 0 1			Busy out during local analog loopback test disabled. Busy out during local analog loopback test enabled.

BIT-MAPPED REGISTER S60
Format		AT [cmds] S60=n [cmds]
Default:		67
Range:		0 - 199
Description:		Controls auto-retrain, MNP, auto-reliable time buffering, RI signal, and extended result codes.
Bit	Value	Function
0	0 í 1	Auto-retrain disabled. Auto-retrain enabled.
1	0 í 1	MNP disabled. MNP enabled.
2	í 0 1	Data is discarded during auto-reliable time. Data is buffered during auto-reliable time.
5 - 3	000	Not used.
6	0 í 1	RI signal high during rings, and forced high for duration of call. RI signal high during rings only.
7	í 0 1	Extended result codes disabled. Extended result codes enabled.

BIT-MAPPED REGISTER S70
Format		AT [cmds] S70=n [cmds]
Default:		15
Range:		0 - 15
Description:		Controls connect mode and V.42 negotiation mode.
Bit	Value	Function
2, 1, 0	000 001 010 011 100 101 110 í 111	Normal mode enabled. Direct mode enabled. MNP mode only enabled. MNP mode with fallback to normal mode enabled. LAP-M mode only enabled. LAP-M mode with fallback to normal mode enabled. LAP-M mode with fallback to MNP enabled. LAP-M mode with fallback to MNP and normal modes enabled.
3	0 í 1	Normal V.42 handshaking enabled. Fast V.42 handshaking enabled.

BIT-MAPPED REGISTER S72
Format		AT [cmds] S72=n [cmds]
Default:		0
Range:		0 - 137
Description:		Controls serial port lock, CTS signal, and auto-callback function.
Bit	Value	Function
0	í 0 1	Serial speed locked. Serial speed follows connect speed.
2, 1	00	Not used.
3	í 0 1	CTS normal. CTS follows CD.
6 - 4	000	Not used.
7	í 0 1	Auto-callback disabled. Auto-callback enabled. The modem, upon detecting an incoming call, will dial the default number and connect with it instead of the incoming call.

BREAK LENGTH
Type:	Register
Format:	AT [cmds] S79=n [cmds]
Default:	35
Range:	0 - 255
Unit:	20 ms
Description:	Sets the length of breaks sent from DCE to DTE.

BREAK TYPE
Type:		Configuration
Format:		AT [cmds] \Kn [cmds]
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.
í \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.

BREAK TYPE
Type:		Register
Format:		AT [cmds] S59=n [cmds]
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
S59=0	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.
S59=1	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.
S59=2	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.
S59=3	Send break to remote modem immediately.		Send break to remote modem immediately.	Send break to remote modem immediately.	Send break to DTE immediately.
S59=4	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.
í S59=5	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.

CHARACTER LENGTH AND PARITY
Format		AT [cmds] S61? [cmds]
Default:		Read-only
Range:		0 - 56
Description:		Reports current character length and parity.
Bit	Value	Meaning
2 - 0	000	Not used.
3	0 1	7 bit character length set. 8 bit character length set.
5, 4	00 01 10 11	MARK parity. No parity. Odd parity. Even parity.

COMMAND SET
Type:	Configuration
Format:	AT [cmds] *NTn [cmds]
Description:	Disables the AT command set.
Note:	To re-enable the command set, cycle power on the modem or hold the Talk/Data switch in for at least five seconds.
Command	Function
*NT0	Command set disabled.
í *NT1	Command set enabled.

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects the active communications mode.
Command	Function
&M0	Asynchronous command and data modes.
&M1	Asynchronous command and synchronous connect mode.
&M2	DTR dialing enabled and synchronous connect mode.
&M3	Manual dialing only and synchronous connect mode.
&M4	V.25bis BISYNC command and synchronous connect mode.
&M5	V.25bis SDLC command and synchronous connect mode.
&M6	V.25bis asynchronous command and synchronous connect mode.

COMPRESSION
Type:	Register
Format:	AT S56=n
Description:	Selects data compression.
Command	Function
S56=0	Data compression disabled.
S56=1	Data compression enabled on transmit only.
Í S56=2	Data compression enabled on receive only.
í S56=3	Data compression enabled.

COMPRESSION AND ERROR CORRECTION - CURRENT
Type:	Register
Format:	AT [cmds] S71? [cmds]
Default:	Read-only
Description:	Reports current compression and error correction protocols.
Value	Meaning
0	No compression or error correction protocols active.
1	Negotiation in progress.
2	MNP2 active.
3	MNP3 active.
4	MNP4 active.
5	MNP5 active.
6	V.42 active.
7	V.42bis active.

CONNECTION SPEED - CURRENT
Type:	Register
Format:	AT [cmds] S67? [cmds]
Default:	Read-only
Description:	Reports current connection speed.
Value	Meaning
1	300bps current speed.
3	1200bps current speed.
4	2400bps current speed.
5	4800bps current speed.
6	7200bps current speed.
7	9600bps uncoded current speed.
8	9600bps current speed.
9	12Kbps current speed.
10	14.4Kbps current speed.
11	16.8Kbps current speed.
12	19.2Kbps current speed.
13	21.6Kbps current speed.
14	24Kbps current speed.
15	26.4Kbps current speed.
16	28.8Kbps current speed.

CONNECTION SPEED LOWER LIMIT
Type:	Configuration
Format:	AT [cmds] %Ln [cmds]
Description:	Sets slowest allowed connection speed.
Command	Function
%L0	No minimum speed.
í %L1	No minimum speed.
%L2	Select 1200bps minimum speed.
%L3	Select 2400bps minimum speed.
%L4	Select 4800bps minimum speed.
%L5	Select 9600bps uncoded minimum speed.
%L6	Select 9600bps minimum speed.
%L7	Select 7200bps minimum speed.
%L8	Select 12Kbps minimum speed.
%L9	Select 14.4Kbps minimum speed.
%L11	Select 16.8Kbps minimum speed.
%L12	Select 19.2Kbps minimum speed.
%L13	Select 21.6Kbps minimum speed.
%L14	Select 24Kbps minimum speed.
%L15	Select 26.4Kbps minimum speed.
%L16	Select 28.8Kbps minimum speed.

CONNECTION SPEED LOWER LIMIT
Type:	Register
Format:	AT [cmds] S81=n [cmds]
Description:	Sets slowest allowed connection speed.
Command	Function
S81=0	No minimum speed.
í S81=1	No minimum speed.
S81=2	Select 1200bps minimum speed.
S81=3	Select 2400bps minimum speed.
S81=4	Select 4800bps minimum speed.
S81=5	Select 9600bps uncoded minimum speed.
S81=6	Select 9600bps minimum speed.
S81=7	Select 7200bps minimum speed.
S81=8	Select 12Kbps minimum speed.
S81=9	Select 14.4Kbps minimum speed.
S81=11	Select 16.8Kbps minimum speed.
S81=12	Select 19.2Kbps minimum speed.
S81=13	Select 21.6Kbps minimum speed.
S81=14	Select 24Kbps minimum speed.
S81=15	Select 26.4Kbps minimum speed.
S81=16	Select 28.8Kbps minimum speed.

CONNECTION SPEED UPPER LIMIT
Type:	Configuration
Format:	AT [cmds] %Bn [cmds]
Description:	Sets fastest allowed connection speed.
Command	Function
%B0	Follow serial port speed.
%B1	Select 300bps maximum speed.
%B2	Select 1200bps maximum speed.
%B3	Select 2400bps maximum speed.
%B4	Select 4800bps maximum speed.
%B5	Select 9600bps uncoded maximum speed.
%B6	Select 9600bps maximum speed.
%B7	Select 7200bps maximum speed.
%B8	Select 12Kbps maximum speed.
í %B9	Select 14.4Kbps maximum speed.
%B11	Select 16.8Kbps maximum speed.
%B12	Select 19.2Kbps maximum speed.
%B13	Select 21.6Kbps maximum speed.
%B14	Select 24Kbps maximum speed.
%B15	Select 26.4Kbps maximum speed.
%B16	Select 28.8Kbps maximum speed.

CONNECTION SPEED UPPER LIMIT
Type:	Configuration
Format:	AT [cmds] S69=n [cmds]
Description:	Sets fastest allowed connection speed.
Command	Function
S69=0	Follow serial port speed.
S69=1	Select 300bps maximum speed.
S69=3	Select 1200bps maximum speed.
S69=4	Select 2400bps maximum speed.
S69=5	Select 4800bps maximum speed.
S69=6	Select 7200bps maximum speed.
S69=7	Select 9600bps uncoded maximum speed.
S69=8	Select 9600bps maximum speed.
S69=9	Select 12Kbps maximum speed.
í S69=10	Select 14.4Kbps maximum speed.
S69=11	Select 16.8Kbps maximum speed.
S69=12	Select 19.2Kbps maximum speed.
S69=13	Select 21.6Kbps maximum speed.
S69=14	Select 24Kbps maximum speed.
S69=15	Select 26.4Kbps maximum speed.
S69=16	Select 28.8Kbps maximum speed.

CTS SIGNAL
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Selects the function of the CTS signal.
Command	Function
&R0	RTS to CTS delay enabled.
í &R1	CTS forced high.
&R2	CTS follows CD.
&R9	CTS follows RTS.

DCD SIGNAL
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Description:	Configures the behavior of the DCD signal.
Command	Function
í &C0	DCD forced high.
&C1	DCD normal.
&C2	DCD forced high except during handshaking and disconnecting.
&C3	DCD follows remote RTS signal.

DISCONNECT BUFFER DELAY
Type:	Register
Format:	AT [cmds] S62=n [cmds]
Default:	0
Range:	0-255
Unit:	1 second
Description:	Configures how long the modem will wait to disconnect if there is data in the transmit or receive buffers.

DISCONNECT ON LOSS OF CURRENT
Type:	Configuration
Format:	AT [cmds] *LCn [cmds]
Description:	Causes the modem to disconnect if the telephone line’s current drops.
Command	Function
*LC0	Do not disconnect on loss of current.
*LC1	Disconnect after 8ms if current is lost.
í *LC2	Disconnect after 90ms if current is lost.

DISCONNECT ON LOSS OF CURRENT
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Description:	Causes the modem to disconnect if the telephone line’s current drops.
Command	Function
S32=0	Do not disconnect on loss of current.
í S32=2	Disconnect after 90ms if current is lost.
S32=4	Disconnect after 8ms if current is lost.

DISCONNECT RESET
Type:	Configuration
Format:	AT [cmds] *ROn [cmds]
Description:	Selects whether the modem will reset on disconnect.
Command	Function
í *RO0	Modem will not reset on disconnect.
*RO1	Modem will reset on disconnect.

DISPLAY INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays modem properties.
Command	Function
I0	Displays product code.
I1	Displays checksum number.
I3	Displays firmware version.
I4	Displays feature code.
I5	Displays reason for last disconnect.

DISPLAY PRODUCT VERSION
Type:	Immediate
Format:	AT [cmds] %V [cmds]
Description:	Displays product version.

DISPLAY SERIAL NUMBER
Type:	Immediate
Format:	AT [cmds] $V [cmds]
Description:	Displays product serial number.

DISPLAY STORED NUMBERS
Type:	Immediate
Format:	AT [cmds] *ND [cmds]
Description:	Displays all stored phone numbers.

DSR SIGNAL
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Controls the behaviour of the DSR signal.
Command	Function
í &S0	DSR forced high.
&S1	DSR normal.
&S2	DSR normal, except forced low on disconnect.
&S3	DSR follows OH.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] S82=n [cmds]
Description:	Selects extended result codes.
Command	Function
í S82=0	Display DTE rate; extended result codes disabled.
S82=4	Display DCE rate; extended result codes enabled.
S82=8	Display DCE rate; extended result codes disabled.

FLOW CONTROL CHARACTER - XOFF FROM TERMINAL
Type:	Register
Format:	AT [cmds] S45=n [cmds]
Default:	19
Range:	0-127
Unit:	ASCII
Description:	Sets the character the terminal sends to represent XOFF.

FLOW CONTROL CHARACTER - XOFF TO TERMINAL
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Default:	19
Range:	0-127
Unit:	ASCII
Description:	Sets the character the modem sends to represent XOFF.

FLOW CONTROL CHARACTER - XON FROM TERMINAL
Type:	Register
Format:	AT [cmds] S44=n [cmds]
Default:	17
Range:	0-127
Unit:	ASCII
Description:	Sets the character the terminal sends to represent XON.

FLOW CONTROL CHARACTER - XON TO TERMINAL
Type:	Register
Format:	AT [cmds] S49=n [cmds]
Default:	17
Range:	0-127
Unit:	ASCII
Description:	Sets the character the modem sends to represent XON.

FLOW CONTROL MODE
Format		AT [cmds] S54=n [cmds]
Default:		33
Range:		0 - 123
Description:		Controls flow control type and pass-through.
Bit	Value	Function
1, 0	00 í 01 10 11	Flow control disabled. Bidirectional XON/XOFF flow control enabled. CTS flow control by DCE enabled. Bidirectional CTS/RTS flow control enabled.
2	0	Not used.
3	í 0 1	Flow control disabled. Flow control enabled.
4	í 0 1	XON/XOFF signals trapped by local modem. XON/XOFF passed through local modem.
6, 5	00 í 01 10 11	Flow control by DCE disabled. XON/XOFF flow control by DCE enabled. RTS flow control by DCE enabled. RTS flow control by DCE enabled.

FORCE RETRAIN
Type:	Immediate
Format:	AT [cmds] *RRn [cmds]
Description:	Forces the modem to attempt to retrain to the selected speed.
Command	Function
*RR0	Attempt 2400bps speed.
*RR1	Attempt 4800bps speed.
*RR2	Attempt 7200bps speed.
*RR3	Attempt 9600bps speed.
*RR4	Attempt 12Kbps speed.
*RR5	Attempt 14.4Kbps speed.
*RR6	Attempt 16.8Kbps speed.
*RR7	Attempt 19.2Kbps speed.
*RR8	Attempt 21.6Kbps speed.
*RR9	Attempt 24Kbps speed.
*RR10	Attempt 26.4Kbps speed.
*RR11	Attempt 28.8Kbps speed.

HANG UP MODE
Type:	Immdeiate/Configuration
Format:	AT [cmds] Hn [cmds]
Description:	Commands the modem to go on- or off-hook, and selects how the modem will hang up.
Command	Function
H0	Modem commanded to go on-hook (hang up).
H1	Modem commanded to go off-hook (pick up).
H2	Set hang up mode to normal on next ATH0 command
H3	Set hang up mode to fast on next ATH0 command

HELP SCREENS
Type:	Immediate
Format:	AT $H=xxxx
Description:	Shows help screens. If a string is included as shown in the example, the modem will search for the string; otherwise, the whole help section will be displayed.

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S58=n [cmds]
Default:	0
Range:	0-255
Unit:	1 minute
Description:	Sets the length of time the modem does not receive information before it disconnects.

LEASED LINE BACKUP RECOVERY DELAY
Type:	Register
Format:	AT [cmds] S28=n [cmds]
Default:	15
Range:	0-255
Unit:	1 minute
Description:	After leased line failure, modem attempts to reconnect after specified delay.

LEASED LINE BACKUP NUMBER
Type:	Register
Format:	AT [cmds] S35=n [cmds]
Description:	Sets the stored number the modem will dial for DTR dialing and leased-line backup.

LOCAL SERIAL PORT SPEED - CURRENT
Type:	Configuration
Format:	AT [cmds] S80=n [cmds]
Description:	Reports the current serial port speed.
Í Command	Function
1	300bps current speed.
2	600bps current speed.
3	1200bps current speed.
4	2400bps current speed.
5	4800bps current speed.
6	7200bps current speed.
7	9600bps current speed.
8	12Kbps current speed.
9	14.4Kbps current speed.
10	16.8Kbps current speed.
11	19.2Kbps current speed.
12	21.6Kbps current speed.
13	24Kbps current speed.
14	26.4Kbps current speed.
15	28.8Kbps current speed.
16	38.4Kbps current speed.
17	57.6Kbps current speed.
18	115.2Kbps current speed.

LOCAL SERIAL PORT SPEED CHANGE ON PIN 23
Type:	Configuration
Format:	AT [cmds] *FBn [cmds]
Description:	Selects whether a voltage transition on pin 23 will cause the modem to change the serial port speed.
Command	Function
í *FB0	Pin 23 transition ignored.
*FB1	Pin 23 negative causes modem to increase serial port speed; pin 23 positive causes modem to decrease serial port speed.

MAXIMUM BLOCK SIZE FOR TRANSMISSION
Type:	Register
Format:	AT [cmds] S63=n [cmds]
Description:	Sets the maximum transmittable block size.
Command	Function
S63=0	MNP block size is 64 characters.
S63=1	MNP block size is 128 characters.
S63=2	MNP block size is 192 characters.
í S63=3	MNP block size is 256 characters.

PROTOCOL/SPEED
Type:	Configuration
Format:	AT [cmds] *MMn [cmds]
Description:	Selects the protocol to use on the next connection.
Command	Function
í *MM0	Auto-detect fastest common protocol.
*MM1	Selects V.21.
*MM2	Selects Bell 103.
*MM5	Selects V.22bis.
*MM11	Selects V.32bis.
*MM12	Selects V.34.

PROTOCOL/SPEED
Type:	Configuration
Format:	AT [cmds] S88=n [cmds]
Description:	Selects the protocol to use on the next connection.
Command	Function
í S88=0	Auto-detect fastest common protocol.
S88=1	Selects V.21.
S88=2	Selects Bell 103.
S88=5	Selects V.22bis.
S88=11	Selects V.32bis.
S88=12	Selects V.34.

PROTOCOL/SPEED - CURRENT
Type:	Configuration
Format:	AT [cmds] S91? [cmds]
Description:	Returns a value indicating the current protocol.
Value	Meaning
0	Auto-detect fastest common protocol.
1	Selects V.21.
2	Selects Bell 103.
5	Selects V.22bis.
11	Selects V.32bis.
12	Selects V.34.

REMOTE CONFIGURATION
Type:	Configuration
Format:	AT [cmds] %T=n [cmds] AT [cmds] D<#>%Tn [cmds]
Description:	Initiates a remote configuration session. This command may follow a dial command, omitting the equal sign, to initiate remote configuration immediately on connection. %T with no parameter will quit the current session.

REMOTE CONFIGURATION PASSWORD
Type:	Configuration
Format:	AT [cmds] %P=nnnn [cmds]
Default:	N/A
Range:	0-99999999, D, <none>
Description:	Sets the security code that a remote modem must send to begin a remote configuration sessions. If nnnn is omitted, the code will be cleared; if a D is given, remote configuration is disabled.

RESULT CODE MODE
Type:	Configuration
Format:	AT [cmds] *RCn [cmds]
Description:	Selects normal or Motorola result code numbering.
Command	Function
í *RC0	Result code 15 is CONNECT 4800 and code 18 is CONNECT 9600 (standard).
*RC1	Result code 11 is CONNECT 4800 and code 12 is CONNECT 9600 (Motorola).

RETRAIN SENSITIVITY
Type:	Configuration
Format:	AT [cmds] %Rn [cmds]
Description:	Sets how poor line conditions must be before the modem will initiate a retrain.
Command	Function
í %R0	Modem will not initiate retrain.
%R1	Modem will initiate retrain when the Bit Error Rate exceeds 10-5.
%R2	Modem will initiate retrain when the Bit Error Rate exceeds 10-4.
%R3	Modem will initiate retrain when the Bit Error Rate exceeds 10-3.

RETRAIN SENSITIVITY
Type:	Register
Format:	AT [cmds] S53=n [cmds]
Description:	Sets how poor line conditions must be before the modem will initiate a retrain.
Command	Function
í S53=0	Modem will not initiate retrain.
S53=4	Modem will initiate retrain when the Bit Error Rate exceeds 10-5.
S53=8	Modem will initiate retrain when the Bit Error Rate exceeds 10-4.
S53=12	Modem will initiate retrain when the Bit Error Rate exceeds 10-3.

RI SIGNAL
Type:	Configuration
Format:	AT [cmds] \Rn [cmds]
Description:	Controls the behavior of the Ring Indicator signal.
Command	Function
\R0	RI signal high during rings and forced high for duration of call.
\R1	RI signal high during rings only.

SECURITY - AUTO-CALLBACK DELAY
Type:	Register
Format:	AT [cmds] S78=n [cmds]
Default:	30
Range:	0-255
Unit:	1 second
Description:	Configures how long the modem will wait to execute the auto-callback sequence after an incoming call is detected.

SECURITY - CALLBACK DELAY
Type:	Register
Format:	AT [cmds] S74=n [cmds]
Default:	15
Range:	0-255
Unit:	1 second
Description:	Configures how long the modem will wait to execute a callback sequence after the user has disconnected.

SECURITY - CALLBACK RETRY
Type:	Register
Format:	AT [cmds] S75=n [cmds]
Default:	Unidentified
Range:	0-255
Unit:	1 redial
Description:	Sets how many times the modem will attempt to execute a callback if the first call fails.

SECURITY - CALLBACK RETRY DELAY
Type:	Register
Format:	AT [cmds] S76=n [cmds]
Default:	15
Range:	0-255
Unit:	1 second
Description:	Configures how long the modem will wait to execute another callback sequence after one has failed.

SECURITY - FAILED LOGIN ATTEMPT MAXIMUM
Type:	Register
Format:	AT [cmds] S77=n [cmds]
Default:	Unidentified
Range:	0-255
Unit:	1 attempt
Description:	Sets the maximum number of failed logins the modem will accept until it disconnects.

SECURITY - PASSWORD TIME
Type:	Register
Format:	AT [cmds] S73=n [cmds]
Default:	Unidentified
Range:	0-255
Unit:	1 second
Description:	Configures how long the modem will wait for a password when in secure mode.

STATUS REGISTER BIT
Type:	Configuration
Format:	Write: AT [cmds] Sn.m=0 or 1 [cmds] Read: AT [cmds] Sn.m=? [cmds]
Description:	Sets/clears or reads bit m of register n.

STATUS REGISTER HEXADECIMAL
Type:	Configuration
Format:	Write: AT [cmds] Sn^=hh [cmds] Read: AT [cmds] Sn?^ [cmds]
Description:	Sets register n to hexadecimal number hh or displays register n in hexadecimal.

STORE TELEPHONE NUMBER
Type:	Configuration
Format:	AT [cmds] &Z<#>
Description:	Writes the indicated telephone number into non-volatile memory location 1.

STORE TELEPHONE NUMBER
Type:	Configuration
Format:	AT [cmds] *CNn,<#>
Description:	Writes the indicated telephone number into non-volatile memory at location n.