MICROLINK 33.6TQV modem/telephone/ISDN Settings and Configuration

ELSA, INC.

MICROLINK 33.6TQV

Card Type	Modem (asynchronous)
Chipset	Unidentified
I/O Options	Voice
Maximum Data Rate	33.6Kbps
Maximum Fax Rate	14.4Kbps
Data Modulation	Bell 103A, 212A ITU-T V.21, V.22, V.23, V.32, V.32bis, V.34 Rockwell V.FC
Fax Modulation	ITU-T V.17, V.27ter, V.29, V.33
Error Correction/Compression	MNP5, V.42, V.42bis
Fax Class	Class I & II
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
Telephone line in	CN1	DC power in	CN4
Telephone line out	CN2	Power switch	SW1
Serial port	CN3

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
POWER	Red	On	Power is on
POWER	Red	Off	Power is off
TXD	Red	On	Modem is transmitting data
TXD	Red	Off	Modem is not transmitting data
RXD	Red	On	Modem is receiving data
RXD	Red	Off	Modem is not receiving data
DTR	Red	On	DTR signal is high
DTR	Red	Off	DTR signal is low
DSR	Red	On	DSR signal is high
DSR	Red	Off	DSR signal is low
RTS	Red	On	RTS signal is high
RTS	Red	Off	RTS signal is low

DIAGNOSTIC LED(S) (CON'T)
LED	Color	Status	Condition
CTS	Red	On	CTS signal is high
CTS	Red	Off	CTS signal is low
DCD	Red	On	Carrier signal detected
DCD	Red	Off	Carrier signal not detected
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, B, E, H, L, M, O, P, T, V, X, Z

&D, &F, &S, &T, &V, &W, &Y, &Z

Extended AT Commands

\C, \J, \K, \N, \Q, \T, \X

%A, %C, %E

Special AT Commands

-J

S-Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S16, S21, S22, S25, S26, S30, S38

Note: See MHI help file for complete information.

Proprietary AT Command Set

AUTO-RELIABLE FALLBACK CHARACTER
Type:	Register
Format:	AT [cmds] S47=n [cmds]
Default:	13
Range:	0-127
Unit:	1 ASCII character
Description:	Sets the character used as the auto-reliable fallback character; S47=0 will disable this function.

BIT-MAPPED REGISTER S14
Format:		AT [cmds] S14=n [cmds]
Default:		81
Range:		0 - 254
Description:		Controls echo, result codes and display, dial mode, and answer/originate mode.
Bit	Value	Function
0	í 0	Not used.
1	0 í 1	Command echo disabled. Command echo enabled.
2	í 0 1	Result codes enabled. Result codes disabled.
3	0 í 1	Display result codes in numeric format. Display result codes in verbose format.
4	í 0 1	Command set enabled. Command set disabled. (See -H command for more information.)
5	í 0 1	Tone dial enabled. Pulse dial enabled.
6	í 0 1	Polling not allowed during connection establishment. Polling allowed during connection establishment.
7	0 í 1	Answer mode enabled. Originate mode enabled.

BIT-MAPPED REGISTER S27
Format:			AT [cmds] S27=n [cmds]
Default:			0
Range:			0 - 192
Description:			Controls modulation protocol and duplexing.
Bit	Value			Function
5 - 0		000000			Not used.
6		í 0 1			ITU/T mode. Bell mode.
7		í 0 1			Full-duplex mode. Half-duplex mode.

BIT-MAPPED REGISTER S28
Format:			AT [cmds] S28=n [cmds]
Default:			6
Range:			0 - 239
Description:			Controls low DTR control, automatic retrain, bit rate tolerance, V.100 fallback, and data format.
Bit	Value			Function
1, 0	00 01 í 10 11			Modem set for 8 data bits in direct mode. Modem set for 9 data bits in direct mode. Modem set for 10 data bits in direct mode. Modem set for 11 data bits in direct mode.
3, 2		00 í 01 10 11			Non-V.100 fallback enabled. V.100 fallback enabled. Fallback disabled. V.100 fallback enabled.
4		0			Not used.
5		í 0 1			Bit rate tolerance set to between -2.5% and +1%. Bit rate tolerance set to between -2.5% and +2.3%.
6		í 0 1			Automatic retrain enabled. Automatic retrain disabled.
7		í 0 1			Modem will not accept calls and generate RING response when DTR is low. Modem will accept calls and generate RING response when DTR is low.

BIT-MAPPED REGISTER S29
Format:			AT [cmds] S29=n [cmds]
Default:			66
Range:			0 - 247
Description:			Controls V.FC ID for V.8, trellis coding, V.32 clear down sequence, V.34 and V.FC rate re-negotiation, V.8 adaptation, asymmetric bit rates, and fallback to V.23.
Bit	Value			Function
0	í 0 1			Fallback to V.23 enabled. Fallback to V.23 disabled.
1	0 í 1			Asymmetric bit rates disabled. Asymmetric bit rates enabled.
2	í 0 1			V.8 adaptation enabled. V.8 adaptation disabled.
3		0			Not used.
4		í 0 1			V.34 and V.FC rate re-negotiation enabled. V.34 and V.FC rate re-negotiation disabled.
5		í 0 1			V.32 clear down sequence disabled. V.32 clear down sequence enabled.
6		0 í 1			Trellis coding in V.32 disabled. Trellis coding in V.32 enabled.
7		í 0 1			V.8 answer tone includes V.FC identification. V.8 answer tone does not include V.FC identification.

BIT-MAPPED REGISTER S31
Format:			AT [cmds] S31=n [cmds]
Default:			0
Range:			0 - 63
Description:			Controls guard tone, calling tone, manual dialing DTR connection, and DTR dialing.
Bit	Value			Function
1, 0		í 00 01 10			Guard tone disabled. 550Hz guard tone enabled. 1800Hz guard tone enabled.
2	í 0 1			Calling tone enabled. Calling tone disabled.
3	í 0 1			V.25 calling tone enabled. V.8 calling tone enabled.
4		í 0 1			Modem will not attempt to connect on high DTR. Modem will attempt to connect on high DTR.
5		í 0 1			DTR dialing disabled. DTR dialing enabled.

BIT-MAPPED REGISTER S33
Format:			AT [cmds] S33=n [cmds]
Default:			0
Range:			0 - 14
Description:			Controls callback mode, callback trace, and remote configuration.
Bit	Value			Function
0, 1		í 00 01 10			Callback disabled. Callback enabled; RING and CONNECT are displayed before login prompts. Callback enabled; RING and CONNECT are displayed after login prompts.
2	í 0 1			Callback trace disabled. Callback trace enabled.
3		í 0 1			Remote configuration disabled. Remote configuration enabled.

BIT-MAPPED REGISTER S36
Format:			AT [cmds] S36=n [cmds]
Default:			131
Range:			0 - 134
Description:			Controls connect mode and Selective Reject.
Bit	Value			Function
2 - 0	000 001 010 í 011 100 101 110			Normal mode enabled. Direct mode enabled. MNP reliable mode enabled. Auto-reliable mode enabled. V.42 reliable mode enabled. V.42 auto-reliable mode enabled. V.42 or MNP reliable mode enabled.
6 - 3		0000			Not used.
7		í 0 1			Selective Reject enabled. Selective Reject disabled.

BIT-MAPPED REGISTER S37
Format:			AT [cmds] S37=n [cmds]
Default:			19
Range:			0 - 211
Description:			Controls line, modem, and serial port speed options.
Bit	Value			Function
4 - 0	00001 00010 00011 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 10000 10001 10010 í 10011			Set line speed to 75/1200bps. Set line speed to 1200/75bps. Set line speed to 300bps. Set line speed to 1200bps. Set line speed to 2400bps. Set line speed to 4800bps. Set line speed to 7200bps. Set line speed to 9600bps. Set line speed to 12Kbps. Set line speed to 14.4Kbps. Set line speed to 16.8Kbps. Set line speed to 19.2Kbps. Set line speed to 21.6Kbps. Set line speed to 24Kbps. Set line speed to 26.4Kbps. Set line speed to 28.8Kbps. Set line speed to 31.2Kbps. Set line speed to 33.6Kbps.
5		0			Not used.
6		í 0 1			Modem port speed changed automatically. User must change modem port speed with %B command.
7		í 0 1			Serial port speed follows connect speed. Serial port speed locked.

BIT-MAPPED REGISTER S48
Format:			AT [cmds] S48=n [cmds]
Default:			164
Range:			0 - 180
Description:			Controls V.42 detection phase, auto-reliable time buffer, and break type.
Bit	Value			Function
1 - 0		00			Not used.
2	0 í 1			V.42 detection phase disabled. V.42 detection phase enabled.
4, 3		í 00 01 10			Data is discarded during auto-reliable time. Data is buffered for 4 seconds or 200 characters during auto-reliable time. Data is discarded during auto-reliable time; modem returns to normal mode on receiving auto-reliable fallback character.
7 - 5		000 001 010 011 100 í 101			\K0 is selected. \K1 is selected. \K2 is selected. \K3 is selected. \K4 is selected. \K5 is selected.

BIT-MAPPED REGISTER S87
Format:		AT [cmds] S87? [cmds]
Default:		Read-only
Range:		0 - 211
Description:		Returns a value indicating current transmit line speed, fax mode connection, and modulation protocol type.
Bit	Value		Meaning
4 - 0	00001 00010 00011 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 10000 10001 10010 10011		Transmit line speed is 75/1200bps. Transmit line speed is 1200/75bps. Transmit line speed is 300bps. Transmit line speed is 1200bps. Transmit line speed is 2400bps. Transmit line speed is 4800bps. Transmit line speed is 7200bps. Transmit line speed is 9600bps. Transmit line speed is 12Kbps. Transmit line speed is 14.4Kbps. Transmit line speed is 16.8Kbps. Transmit line speed is 19.2Kbps. Transmit line speed is 21.6Kbps. Transmit line speed is 24Kbps. Transmit line speed is 26.4Kbps. Transmit line speed is 28.8Kbps. Transmit line speed is 31.2Kbps. Transmit line speed is 33.6Kbps.

BIT-MAPPED REGISTER S87 (CON'T)
Bit	Value		Meaning
5		0		Not used.
6		0 1		Modem is not connected in fax mode. Modem is connected in fax mode.
7		0 1		ITU-T protocols selected. Bell protocols selected.

BIT-MAPPED REGISTER S88
Format:			AT [cmds] S88? [cmds]
Default:			Read-only
Range:
Description:			Returns a value indicating
Bit	Value			Meaning
0	0 1			Modem is not connected with MNP1 through MNP4. Modem is connected with MNP1 through MNP4.
1		0 1			Modem is not connected with MNP5. Modem is connected with MNP5.
2		0 1			Modem is not connected with V.42. Modem is connected with V.42.
3		0 1			Modem is not connected with V.42bis. Modem is connected with V.42bis.

BIT-MAPPED REGISTER S89
Format:		AT [cmds] S89? [cmds]
Default:		Read-only
Range:		0 - 211
Description:		Returns a value indicating current receive line speed and modulation protocol.
Bit	Value		Meaning
4 - 0	00001 00010 00011 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 10000 10001 10010 10011		Receive line speed is 75/1200bps. Receive line speed is 1200/75bps. Receive line speed is 300bps. Receive line speed is 1200bps. Receive line speed is 2400bps. Receive line speed is 4800bps. Receive line speed is 7200bps. Receive line speed is 9600bps. Receive line speed is 12Kbps. Receive line speed is 14.4Kbps. Receive line speed is 16.8Kbps. Receive line speed is 19.2Kbps. Receive line speed is 21.6Kbps. Receive line speed is 24Kbps. Receive line speed is 26.4Kbps. Receive line speed is 28.8Kbps. Receive line speed is 31.2Kbps. Receive line speed is 33.6Kbps.

BIT-MAPPED REGISTER S89 (CON'T)
Bit	Value		Meaning
7 - 5		000 001 010 011 100 101 110 111		Modulation protocol in use is V.23. Modulation protocol in use is V.21. Modulation protocol in use is V.22bis. Modulation protocol in use is V.32. Modulation protocol in use is V.32bis. Modulation protocol in use is V.FC. Modulation protocol in use is V.34. Modulation protocol in use is V.34 with asymmetric bit rates.

BIT-MAPPED REGISTER S95
Format:			AT [cmds] S95=n [cmds]
Default:			8
Range:			0 - 184
Description:			Controls result code options and CONNECT response after invalid escape sequence.
Bit	Value			Function
3 - 0		0000 0001 0010 í 1000			Extended result codes disabled. /REL extended result codes enabled. LAPM and MNP extended result codes enabled. V.42bis, MNP5, and modulation protocol (if selected with S96) extended result codes enabled.
4		í 0 1			Modem uses \V command to select extended result codes. Modem always displays extended result codes.
5		í 0 1			Modem will send CONNECT response after invalid escape sequence. Modem will not send CONNECT response after invalid escape sequence.
7, 6		í 00 01 10			Result codes enabled. Result codes disabled. Result codes disabled in answer mode.

BIT-MAPPED REGISTER S96
Format:			AT [cmds] S96=n [cmds]
Default:			8
Range:			0 - 110
Description:			Controls register display, end-of-page prompting, modem language, bit rate display, and \V8 result code format.
Bit	Value			Function
1, 0	í 00 01 10			Modem will display register values in decimal. Modem will display register values in hexadecimal. Modem will display register values in binary.
2		í 0 1			Modem will prompt user to press a key after a full page of text. Modem will not prompt user to press a key after a full page of text.
3		0 í 1			Modem text displayed in German. Modem text displayed in English.
4		0			Not used.
5		í 0 1			Modem will display transmit bit rate. Modem will display both transmit and receive bit rate.
6		í 0 1			Modem will display only error correction and compression result codes with \V8. Modem will display error correction, compression, and modulation result codes with \V8.

BIT-MAPPED REGISTER S130
Format:			AT [cmds] S130=n [cmds]
Default:			4
Range:			0 - 220
Description:			Controls T.4 bit order, fax mode, fill bit removal, fax mode flow control, and V.17 modulation.
Bit	Value			Function
1, 0		00			Not used.
2	0 í 1			T.4 bit order for Class 2 fax receive reversed. T.4 bit order for Class 2 fax receive normal.
3		í 0 1			Modem is in normal fax mode. Modem is in Elsa TransFax mode.
4		í 0 1			Fill bits are removed from T.4 data. Fill bits are not removed from T.4 data.
5		0			Not used.
6		í 0 1			Unidirectional CTS and XON/XOFF flow control enabled. Flow control set by \Q command.
7		í 0 1			V.17 fax modulation enabled. V.17 fax modulation disabled.

CALL FAILURE INDICATION
Type:	Register (read-only)
Format:	AT [cmds] S86? [cmds]
Description:	Returns a value indicating the cause of the last disconnect.
Value	Meaning
0	Normal disconnection, no error occurred.
4	Loss of carrier occurred.
5	Negotiation phase failed; modem at remote station has no error correction.
6	Remote modem is not answering protocol requests.
7	Remote modem is only functioning synchronously.
8	Modems could not find a common framing scheme.
9	Modems could not find a common protocol.
10	Remote modem is sending incorrect protocol requests.
11	Synchronous information is missing; connection terminated after 30 seconds.
12	Normal disconnect initiated by the remote modem.
13	Remote modem is no longer answering; connection terminated after 10 re-transmissions.
14	Protocol violation occurred.
15	Compression error occurred.
16	Inactivity timer has elapsed.
17	No loop current detected.
20	Busy tone detected.
21	No dial tone detected.
22	No answer tone detected.
23	No connection reached, connection timed out, or wrong modulation type.
24	Fallback not permitted because of AT%L2; connection terminated.
25	No modem or fax is answering at the number called.
30	ATH was entered online.
31	ATZ was entered online.
32	AT&T0 was entered - modem is in analog loopback test.
33	Keystroke received during handshaking.
34	DTR signal dropped.
60	V.32/V32bis handshake signal AA, CC, AC or CA missing.
61	V.32/V.32bis handshake signal R1, R2 or R3 missing.
62	V.32/V.32bis handshake signal S missing.
63	V.32/V.32bis handshake signal transition from S to \S missing.
64	V.32/V.32bis handshake signal E missing.
68	No answer to automatic retrain.

CALLBACK
Type:	Configuration
Format:	AT [cmds] $Bn [cmds]
Description:	Selects what type of callback procedure is used.
Command	Function
í $B0	Callback disabled.
$B1	Callback enabled; RING and CONNECT result codes are displayed before login prompts.
$B2	Callback enabled; RING and CONNECT result codes are displayed after login prompts.

CALLBACK DELAY
Type:	Register
Format:	AT [cmds] S43=n [cmds]
Default:	1
Range:	0 - 2
Unit:	1 minute
Description:	Sets the amount of time that must elapse before the modem will attempt a callback sequence.

CALLBACK - MAXIMUM CALLBACK ATTEMPTS
Type:	Register
Format:	AT [cmds] S35=n [cmds]
Default:	3
Range:	1 - 99
Unit:	1 callback
Description:	Sets the maximum number of callback attempts the modem will perform.

CALLBACK TRACE
Type:	Configuration
Format:	AT [cmds] $Tn [cmds]
Description:	Selects whether the progress of callback procedures will be displayed as a diagnostic tool.
Command	Function
í $T0	Callback trace disabled.
$T1	Callback trace enabled.

COMMAND SET
Type:	Configuration
Format:	AT [cmds] -Hn [cmds]
Description:	Selects whether the modem will generate result codes and accept commands. When the command set is disabled, the modem will still accept the -H and D commands, and will act as if S0=1.
Command	Function
í -H0	Command set enabled.
-H1	Command set disabled.

COMPRESSION
Type:	Register
Format:	AT [cmds] S46=n [cmds]
Description:	Selects data compression.
Command	Function
S46=0	Data compression disabled.
S46=1	MNP5 enabled.
S46=2	V.42bis enabled.
í S46=3	MNP5 and V.42bis enabled.

CTS, DCD, AND DSR SIGNALS
Format:			AT [cmds] S52=n [cmds]
Default:			4
Range:			0 - 11
Description:			Controls the behaviour of the CTS, DCD, and DSR signals.
Bit	Value			Function
0	í 0 1			DSR forced high. DSR normal.
1	í 0 1			CTS forced high. CTS normal.
3, 2		00 í 01 10			DCD forced high. DCD forced high after carrier signal is detected. DCD forced high except at disconnect.

DATA FORMAT
Type:	Register
Format:	AT [cmds] S53=n [cmds]
Description:	Controls the data length, parity, and stop bit for the local serial port.
Command	Function
í S53=0	Data format set to 8N1, 7E1, 7O1, or 7N2.
S53=1	Data format set to 8E1
S53=2	Data format set to 8O1
S53=3	Data format set to 8N2

DCD SIGNAL
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Description:	Controls the behaviour of the DCD signal.
Command	Function
í &C0	DCD forced high.
&C1	DCD forced high after carrier signal is detected.
&C2	DCD forced high except at disconnect.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Description:	Dials the telephone number indicated according to any modifiers included in the string.
Command	Function
DL	Re-dial last number.
DM	Make a LAPM reliable mode connection this call.
DP	Pulse dialing enabled.
DQ	Make an LAPM auto-reliable mode connection this call.
DSn	Dial stored telephone number n.
DT	Tone dialing enabled.
DV	Make an LAPM or MNP reliable mode connection this call.
DW	Dialing resumed following dial tone detection.
DX	Make an auto-reliable mode connection this call.
DY	Make an MNP reliable mode connection this call.
DZ	Make a normal mode connection this call.
D,	Dialing paused for amount of time specified in S8 register.
D<	Dialing paused for 1 second.
D/n	Dial stored telephone number n.
D!	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D@	Wait for Quiet Answer function enabled. Modem waits until a "quiet answer," a ring-back signal followed by silence up to the time specified in S7, is received prior to executing the rest of the dial string.
D&	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D=	Dialing paused for 3 seconds.
D[	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.
D:	Dialing resumed following dial tone detection.

DISCONNECT BUFFER DELAY
Type:	Configuration
Format	AT [cmds] %Dn [cmds]
Default:	0
Range:	0-255
Unit:	1 second
Description:	Sets maximum duration allowed during buffered data calls for modem to perform clearing functions after losing carrier-signal or receiving a clear call signal from the remote modem and before initiating hang-up process.

DISPLAY CONFIGURATION
Type:	Immediate
Format:	AT [cmds] \Sn [cmds]
Description:	Displays the settings of all commands.
Command		Function
\S0		Displays all command settings.
\S1		Displays all command settings.
\S2		Displays line and host interface, protocol, and result code/speaker command settings.
\S3		Displays host interface, protocol, and result code/speaker command settings.
\S4		Displays host interface and result code/speaker command settings.
\S5		Displays result code/speaker command settings.

DISPLAY FIRMWARE VERSION
Type:	Immediate
Format:	AT [cmds] %V [cmds]
Description:	Displays the current firmware version.

DISPLAY INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested about the modem.
Command	Function
I0	Displays product identification code.
I1	Displays ROM checksum.
I2	Tests and displays ROM checksum result.
I3	Displays firmware revision.
I4	Displays configuration.
I5	Displays serial number.
I6	Displays product name.
I7	Displays result of power-up self-test.
I9	Displays Plug-N-Play information.

DISPLAY REGISTERS
Type:	Immediate
Format:	AT [cmds] %R [cmds]
Description:	Displays all status registers.

DISPLAY STORED NUMBERS
Type:	Immediate
Format:	AT [cmds] \F [cmds]
Description:	Displays all stored telephone numbers.

DSR AND CTS SIGNALS
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Description:	Controls the behaviour of the DSR and CTS signals.
Command	Function
í \D0	DSR and CTS forced high.
\D1	DSR normal, CTS forced high.
\D2	DSR forced high, CTS follow CD.
\D3	DSR normal, CTS forced high.

DTR DIALING
Type:	Configuration
Format:	AT [cmds] $Dn [cmds]
Description:	Selects whether the modem will use DTR dialing.
Command	Function
í $D0	DTR dialing disabled.
$D1	DTR dialing enabled.

EXTENDED RESULT CODE SELECTION
Type:	Configuration
Format:	AT [cmds] -Mn [cmds]
Description:	Selects whether the modem will use the \V command to select extended result codes.
Command	Function
í -M0	Modem uses \V command to select extended result codes.
-M1	Modem always displays extended result codes.

EXTENDED RESULT CODES
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Description:	Selects extended result codes.
Command	Function
\V0	Extended result codes disabled.
\V1	/REL extended result codes enabled.
\V2	LAPM and MNP extended result codes enabled.
í \V8	V.42bis, MNP5, and modulation protocol (if selected with S96) extended result codes enabled.

FLOW CONTROL OPTIONS
Format:			AT [cmds] S51=n [cmds]
Default:			3
Range:			0 - 20
Description:			Controls flow control type and XON/XOFF pass-through.
Bit	Value			Function
2 - 0	000 001 010 í 011 100			Flow control disabled. Bidirectional XON/XOFF flow control enabled. CTS flow control by DCE enabled. Bidirectional RTS/CTS flow control enabled. Unidirectional XON/XOFF flow control by DCE enabled.
3		0			Not used.
4		í 0 1			XON/XOFF signals trapped by local modem. XON/XOFF signals passed through by local modem.

GUARD TONE AND CALLING TONE
Type:	Configuration
Format:	AT [cmds] &Gn [cmds]
Description:	Commands the modem to transmit a calling tone, and a guard tone in V.22 or V.22bis modes.
Command	Function
í &G0	Guard tone disabled, calling tone enabled.
&G1	550Hz guard tone and calling tone enabled.
&G2	1800Hz guard tone and calling tone enabled.