Card Type	Modem (synchronous/asynchronous)
Chipset	Siemens-Nixdorf
Maximum Modem Rate	28.8Kbps
Maximum Fax Rate	14.4Kbps
Data Bus	Serial/Parallel
Fax Class	Class I & II
Modem Modulation Protocol	Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.26bis, V.27bis, V.29, V.32, V.32bis, V.33, V.34 ZyXEL ZyX19200, ZyX16800, ZyCELL cellular
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
RS-232/422 port		CN1		Parallel port		CN5
Switched line out		CN2		Data/voice switch		BT1
Leased line out		CN3		Originate/answer switch		BT2
DC power		CN4

DRAM
Size	Bank 0	Bank 1
4MB	(2) 4M x 4	None
8MB	(2) 4M x 4	(2) 4M x 4

DIAGNOSTIC LED(S)
LED	Color		Status		Condition
PWR	Red		On		Power is on
PWR	Red		Off		Power is off
TST	Red		On		Modem is in test mode
TST	Red		Off		Modem is not in test mode
FAX	Red		On		Modem is connected in fax mode
FAX	Red		Off		Modem is not connected in fax mode
LL	Red		On		Modem is connected on leased line
LL	Red		Off		Modem is not connected on leased line
SP	Red		On		Modem is communicating over serial port
SP	Red		Off		Modem is not communicating over serial port
PRP	Red		On		Modem is printing over parallel port
PRP	Red		Off		Modem is not printing over parallel port
PCP	Red		On		Modem is communicating over parallel port
PCP	Red		Off		Modem is not communicating over parallel port
V34 Status		V32b Status		Condition
Off		Off		Modem is operating with a modulation earlier than V.32
Off		On		Modem is operating with V.32bis or V.32 modulation
On		Off		Modem is operating with V.34 modulation
On		On		Modem is operating with ZyXEL proprietary modulation
AA	Red		On		Auto-answer enabled
AA	Red		Off		Auto-answer disabled
AA	Red		Blinking		Phone is ringing
CD	Red		On		Carrier signal detected
CD	Red		Off		Carrier signal not detected
LED	Color		Status		Terminal Mode	Printer Mode
DTR/POL	Red		On		DTR signal is high	Printer is on-line
DTR/POL	Red		Off		DTR signal is low	Printer is off-line
DSR/PSL	Red		On		DSR signal is high	Printer is ready for input
DSR/PSL	Red		Off		DSR signal is low	Printer is not ready for input
RTS/PPE	Red		On		RTS signal is high	Printer is out of paper
RTS/PPE	Red		Off		RTS signal is low	Printer is not out of paper
CTS/PER	Red		On		CTS signal is high	Printer has encountered an error
CTS/PER	Red		Off		CTS signal is low	Printer has not encountered an error
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
EC	Red		On		Error correction enabled
EC	Red		Off		Error correction disabled
EC	Red		Blinking		Modem is retransmitting data

DIAGNOSTIC LED(S) (CON’T)
LED	Color	Status	Condition
SQ	Red	On	Signal quality is good
SQ	Red	Blinking	Signal quality is poor
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
ORG	Red	On	Modem is in originate mode
ORG	Red	Off	Modem is in answer mode

BIT-MAPPED REGISTER S14
Format:		AT [cmds] S14=n [cmds]
Default:		2
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls sync/async, clock source, line type, loopback test request, and leased line mode.
Bit	Value	Function
0	í 0 1	Originate mode in leased line operation. Answer mode in leased line operation.
1	0 í 1	Grant request for remote digital loopback test. Deny request for remote digital loopback test.
3, 2	í 00 01 10	Switched line type. Two-wire leased line type. Four-wire leased line type.
5, 4	í 00 01 10	Clock signal local internal. Clock signal local external. Clock signal remote.
7, 6	í 00 01 10 11	Buffered asynchronous mode. Asynchronous while in command mode, switch to synchronous while in data mode. Unbuffered asynchronous mode. Synchronous mode.

BIT-MAPPED REGISTER S15
Format:		AT [cmds] S15=n [cmds]
Default:		130
Range:		0 - 158
Unit:		Bit-mapped
Description:		Controls active profile and data format.
Bit	Value	Function
1, 0	00 01 í 10	Use even parity. Use odd parity. Do not use parity.
2	í 0 1	Use 1 stop bit. Use 2 stop bit.
4, 3	í 00 01 10 11	Use 10-bit characters. Use 11-bit characters. Use 9-bit characters. Use 8-bit characters.
7, 6, 5	000 001 010 011 í 100	Profile 0 active at power-up. Profile 1 active at power-up. Profile 2 active at power-up. Profile 3 active at power-up. Factory defaults active at power-up.

BIT-MAPPED REGISTER S17
Format:		AT [cmds] S17=n [cmds]
Default:		18
Range:		0 - 191
Unit:		Bit-mapped
Description:		Controls command set type, dialing mode, leased line transmit attenuation, and secondary networking channel.
Bit	Value	Function
0	í 0 1	Secondary channel disabled. Secondary channel enabled.
4 - 1	0000 ... í 1001 ... 1111	Sets leased line transmit attenuation level to 0dBm. ... Sets leased line transmit attenuation level to -9dBm. ... Sets leased line transmit attenuation level to -15dBm.
5	í 0 1	Originate mode. Answer mode.
7, 6	í 00 01 10	AT command set enabled. V25bis command set enabled. Command sets disabled.

BIT-MAPPED REGISTER S21
Format:		AT [cmds] S21=n [cmds]
Default:		178
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls DTR, CTS, CD, and DSR signals, speaker, and error correction.
Bit	Value	Function
0	í 0 1	Attempt an error-correcting connection. If that fails, attempt a normal connection. Attempt an error-correcting connection. If that fails, hang up.
2, 1	00 í 01 10 11	Speaker disabled. Speaker enabled until carrier signal detected Speaker enabled. Speaker enabled following dialing, then disabled after carrier signal detected.
3	í 0 1	DSR forced high. DSR normal.
4	0 í 1	CD forced high. CD normal.
5	0 í 1	CTS follows RTS when in synchronous mode. CTS forced high when in synchronous mode.
7, 6	00 01 í 10 11	DTR is forced on. Dial default number on high DTR; hang up on low DTR. Low DTR hangs up and returns to command mode. Low DTR hangs up and resets the modem to profile 0.

BIT-MAPPED REGISTER S23
Format:		AT [cmds] S23=n [cmds]
Default:		105
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls result codes, dialing, and echo.
Bit	Value	Function
0	0 í 1	Command echoing disabled. Command echoing enabled.
1	0	Not used.
2	í 0 1	Select pulse dial make/break ratio of 39/61ms at 10pps (North America). Select pulse dial make/break ratio of 33/67ms at 10pps (Europe).
5, 4, 3	000 001 010 011 100 í 101 110 111	Basic result codes only enabled. Basic and connection speed result codes enabled. Basic and connection speed result codes and dialtone detection enabled. All result codes except dialtone detection enabled. All result codes enabled. All result codes plus DTE speed and error control level enabled. All result codes plus ARQ enabled. All result codes plus ARQ and error control level enabled.
6	0 í 1	Display result codes in numeric form. Display result codes in long form.
7	í 0 1	Result codes enabled. Result codes disabled.

BIT-MAPPED REGISTER S24
Format:		AT [cmds] S24=n [cmds]
Default:		138
Range:		0 - 238
Unit:		Bit-mapped
Description:		Controls speaker volume and ring volume.
Bit	Value	Function
0	0	Not used.
3, 2, 1	000 001 í 100 111	Ring volume off. Ring volume low. ... Ring volume medium. ... Ring volume high.
4	0	Not used.
7, 6, 5	000 001 100 í 101 111	Speaker volume off. Speaker volume low. ... Speaker volume medium. ... Speaker volume high.

BIT-MAPPED REGISTER S27
Format:		AT [cmds] S27=n [cmds]
Default:		156
Range:		0 - 228
Unit:		Bit-mapped
Description:		Controls reaction to poor signal quality, flow control, and error correction.
Bit	Value	Function
2, 1, 0	000 001 010 011 í 100	Error correction disabled for fax/modem. MNP4 enabled for fax/modem. MNP5 enabled for fax/modem. V.42 and MNP4 enabled for fax/modem. V.42bis and MNP5 enabled for fax/modem.
5, 4, 3	000 í 011 100	Flow control disabled. Hardware flow control enabled. Software flow control enabled.
7, 6	00 01 í 10 11	Modem does nothing during poor signal quality. Modem retrains during poor signal quality. Modem fall-back during poor signal quality, and fall-forward when signal improves. Modem will disconnect during poor signal quality.

BIT-MAPPED REGISTER S28
Format:		AT [cmds] S28=n [cmds]
Default:		68
Range:		0 - 235
Unit:		Bit-mapped
Description:		Controls front panel lock, break type, guard tone, local serial port speed lock, and 1200bps protocol.
Bit	Value	Function
0	0	Not used.
1	í 0 1	Panel key unlocked. Panel key locked.
3, 2	00 í 01 10	Destructive break sent ahead of data stream. Non-destructive break sent ahead of data stream. Non-destructive break sent at end of data stream.
5, 4	í 00 10	Guard tone disabled. Guard tone enabled.
6	0 í 1	Local serial port speed follows connect speed. Local serial port speed locked.
7	í 0 1	Sets V.22 as 1200bps protocol. Sets Bell 212/A as 1200bps protocol.

BIT-MAPPED REGISTER S35
Format:		AT [cmds] S35=n [cmds]
Default:		32
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls 4800bps V.32, handshake interruption, V.26bis mode, leased line transmission attenuation, Selective Reject, password protection, and extended result codes.
Bit	Value	Function
0	í 0 1	4800bps V.32 normal. Use ZyCELL 4800bps trellis coded instead of 4800bps V.32.
1	í 0 1	Handshake can be interrupted. Handshake cannot be interrupted.
2	í 0 1	V.26bis normal. V.26bis mode A.
3	í 0 1	Leased line transmission level normal. Leased line transmission is attenuated by -12dBm.
4	í 0 1	Modem will not dial default number when Data/Voice button is pressed Modem will dial default number when Data/Voice button is pressed
5	0 í 1	V.42 Selective Reject disabled. V.42 Selective Reject enabled.
6	í 0 1	Profile password protection disabled. Profile password protection enabled.
7	í 0 1	Connection speed result codes disabled on error correcting connection. Connection speed result codes enabled on error correcting connection.

BIT-MAPPED REGISTER S36
Format:		AT [cmds] S36=n [cmds]
Default:		0
Range:		0 - 163
Unit:		Bit-mapped
Description:		Controls security and remote profiles.
Bit	Value	Function
0	í 0 1	Deny remote request for current configuration. Grant remote request for current configuration.
1	í 0 1	Copies local profile to remote profile. Profiles set with S37. Copies remote profile to local profile. Profiles set with S37.
4-2	000	Not used.
7, 6, 5	í 000 001 010 011 100 101	Security disabled. Security type I and password check enabled. Security type I, callback, and password check enabled. Security type II and password check enabled. Security type II, callback, and password check enabled. Security type II, callback, and password check enabled. Callback number sent by remote.

BIT-MAPPED REGISTER S38
Format:		AT [cmds] S38=n [cmds]
Default:		0
Range:		0 - 57
Unit:		Bit-mapped
Description:		Controls auto-dial, CD signal, fax auto-answer, and MNP5.
Bit	Value	Function
0	í 0 1	Auto-dial of default number disabled. Auto-dial of default number enabled.
2-1	00	Not used.
3	í 0 1	CD normal. CD according to UNIX standard.
4	í 0 1	Fax auto-answer enabled. Fax auto-answer disabled.
5	í 0 1	MNP5 enabled. MNP5 disabled.

BIT-MAPPED REGISTER S39
Format:		AT [cmds] S39=n [cmds]
Default:		0
Range:		0 - 252
Unit:		Bit-mapped
Description:		Controls answer mode, Class 2 fax modes, V.26bis scrambler, DTMF detection, and resync info.
Bit	Value	Function
1-0	00	Not used.
2	í 0 1	Answer in answer mode. Answer in originate mode.
3	í 0 1	Normal Class 2 fax. Bitfax-compatible Class 2 fax.
4	í 0 1	Normal Class 2 fax. Local serial port speed shift for Class 2 fax.
5	í 0 1	V.26bis scrambler enabled. V.26bis scrambler disabled.
6	í 0 1	DTMF detection in voice mode only. DTMF detection on AT+VLS=2 command.
7	í 0 1	Resync information not included in ADPCM voice file. Resync information included in ADPCM voice file.

BIT-MAPPED REGISTER S40
Format:		AT [cmds] S40=n [cmds]
Default:		0
Range:		0 - 126
Unit:		Bit-mapped
Description:		Controls extended ring detection and result codes.
Bit	Value	Function
0	0	Not used.
1	í 0 1	Modem returns result codes. Modem does not return result codes.
2	í 0 1	Caller ID disabled. Caller ID enabled.
3	í 0 1	Ring type 1 detection disabled. Ring type 1 detection enabled.
4	í 0 1	Ring type 2 detection disabled. Ring type 2 detection enabled.
5	í 0 1	Ring type 3 detection disabled. Ring type 3 detection enabled.
6	í 0 1	Ring type 4 detection disabled. Ring type 4 detection enabled.
7	0	Not used.

BIT-MAPPED REGISTER S41
Format:		AT [cmds] S41=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls MNP compatibility mode, V.25bis idle, retrain timeout, loopback tests, blind dial time, DSR signal, S0 register, and calling tone.
Bit	Value	Function
0	í 0 1	MNP compatibility mode disabled. MNP compatibility mode enabled.
1	í 0 1	Use flag for V.25bis idle. Use mark for V.25bis idle.
2	í 0 1	Retrain timeout normal. Retrain timeout set to 5 minutes.
3	í 0 1	Loopback test signals disabled. Loopback test signals enabled.
4	í 0 1	Modem waits for dial tone before dialing. Modem waits for time set in S6 and then blind-dials.
5	í 0 1	DSR normal. DSR follows CD and goes low for 1/2 second on loss of carrier.
6	í 0 1	Register S0 behaves normally. Force S0 to be greater than 2.
7	í 0 1	Respond to calling tone. Ignore calling tone.

BIT-MAPPED REGISTER S42
Format:		AT [cmds] S42=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls secondary channel speed, throughput averaging, Caller ID display, escape sequence, V.17 mode, data/voice switch, and CD signal.
Bit	Value	Function
0	í 0 1	Secondary channel 2400/75bps. Secondary channel 2400bps.
1	í 0 1	Throughput averaging disabled. Throughput averaging enabled.
2	í 0 1	Caller ID information will be displayed even if ATQ2 is set. Caller ID information will not be displayed if ATQ2 is set.
3	í 0 1	Escape sequence enabled in answer mode. Escape sequence disabled in answer mode.
4	í 0 1	V.17 enabled. Disable V.17 in originate mode.
5	í 0 1	Data/Voice switch enabled. Data/Voice switch disabled.
6	í 0 1	Enable RING result. Disable RING result.
7	í 0 1	CD forced high. CD pulses off at carrier loss.

BIT-MAPPED REGISTER S44
Format:		AT [cmds] S44=n [cmds]
Default:		0
Range:		0 - 124
Unit:		Bit-mapped
Description:
Bit	Value	Function
1-0	00	Not used.
2	í 0 1	Dial backup executed automatically. Dial backup waits for panel input.
3	í 0 1	Cyclic dial disabled. Cyclic dial enabled.
4	í 0 1	DSR normal. DSR follows DTR.
5	í 0 1	V.13 simulation disabled. V.13 simulation enabled.
6	í 0 1	&B0 &B1	Local serial port speed determined normally. Local serial port is locked at 19.2Kbps if link is 9600bps or faster, at 9600bps if link is 7200bps, and else at link speed. Local serial port locked if ARQ link, and follows link speed otherwise.

BIT-MAPPED REGISTER S48
Format:		AT [cmds] S48=n [cmds]
Default:		0
Range:		0 - 61
Unit:		Bit-mapped
Description:		Controls caller ID format, call answering, calling tone, V.23 speed, DTR change action, and protocol negotiation.
Bit	Value	Function
0	í 0 1	Caller ID displayed normally. Caller ID displayed as raw data.
1	í 0 1	Answer all incoming calls. Answer data calls only.
2	í 0 1	Calling tone disabled. Calling tone enabled.
3	í 0 1	V.23 speed set to 1200/75. V.23 speed set to 75/1200.
4	í 0 1	Modem does nothing on DTR change. Modem will dial default number on high DTR and disconnect and reset on low DTR.
5	í 0 1	Modem will negotiate all protocols. Modem will not negotiate protocols faster than 9600bps.

BIT-MAPPED REGISTER S52
Format:		AT [cmds] S52=n [cmds]
Default:		0
Range:		0 - 144
Unit:		Bit-mapped
Description:		Controls received signal level and initial V.23 handshake signal.
Bit	Value	Function
2-0	000	Not used.
4, 3	í 00 01 10	Adjust received signal to -43dBm. Adjust received signal to -33dBm. Adjust received signal to -26dBm.
6-5	00	Not used.
7	í 0 1	First signal of V.23 handshake is Mark. First signal of V.23 handshake is Space.

BIT-MAPPED REGISTER S57
Format:		AT [cmds] S57=n [cmds]
Default:		16
Range:		0 - 80
Unit:		Bit-mapped
Description:		Controls fax class 1 and busy detection during dialing.
Bit	Value	Function
3-0	0000	Not used.
4	0 í 1	Fax class 1 disabled. Fax class 1 enabled.
5	0	Not used.
6	í 0 1	Busy detection disabled during dialing. Busy detection enabled during dialing.

BIT-MAPPED REGISTER S84
Format:		AT [cmds] S84=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls register value format, caller ID information reporting, and serial port mode.
Bit	Value	Function
2-0	000	Not used.
3	í 0 1	Display register values in decimal. Display register values in hexadecimal.
4	í 0 1	Caller ID information display enabled. Caller ID information display disabled.
6-5	00	Not used.
7	í 0 1	Serial port in single-stream mode. Serial port in multistream mode.

BREAK TYPE
Type:	Configuration
Format:	AT [cmds] &Yn [cmds]
Description:	Configures action of break signal.
Command	Function
&Y0	Break empties buffer and is sent immediately.
í &Y1	Break does not empty buffer and is sent immediately.
&Y2	Break does not empty buffer and is sent in data stream.

CALLBACK NUMBER DISPLAY
Type:	Immediate
Format:	AT [cmds] *VC [cmds]
Description:	Displays the table of callback numbers.
Note:	The supervisor password must be entered to execute this command.

CALLER ID INFORMATION
Type:	Immediate
Format:	AT [cmds] *T [cmds]
Description:	Displays the last caller ID information.

CALLER ID SILENCE DELAY
Type:	Register
Format:	AT [cmds] S45=n [cmds]
Default:	87
Range:	0-255
Unit:	20ms
Description:	Time period in which Caller ID silence detection is disabled.

CALLER ID SILENCE DETECTION
Type:	Register
Format:	AT [cmds] S46=n [cmds]
Default:	3
Range:	0-255
Unit:	20ms
Description:	Time period for which silence must be detected for Called ID information to be processed.

CELLULAR MODE
Format:		AT [cmds] S49=n [cmds]
Default:		9
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls cellular transmission attenuation and cellular function.
Bit	Value	Function
3 - 0	0000 ... í 1001 ... 1111	Sets cellular transmit attenuation level to -9dBm. ... Sets cellular transmit attenuation level to -18dBm. ... Sets cellular transmit attenuation level to -24dBm.
6-4	000	Not used.
7	í 0 1	Cellular mode over phone lines. Cellular mode through cellular phone.

CHARACTER LENGTH
Type:	Configuration
Format:	AT [cmds] *Cn [cmds]
Description:	Sets length of character.
Command	Function
í *C0	Set 10-bit character.
*C1	Set 11-bit character.
*C2	Set 9-bit character.
*C3	Set 8-bit character.

COMMAND MODE TYPE
Type:	Configuration
Format:	AT [cmds] *In [cmds]
Description:	Selects the command set the modem will use.
Command	Function
í *I0	AT command set enabled.
*I1	V.25bis command set enabled.
*I2	Dumb terminal mode, all command sets disabled.
Note: To leave dumb terminal mode, front panel menu must be used.

COMPRESSION AND ERROR CORRECTION MODE
Type:	Configuration
Format:	AT [cmds] &Kn [cmds]
Description:	Selects the type of error correction and data compression used.
Command	Function
&K0	Error correction and compression disabled for switched-line calls.
&K1	MNP4 enabled for switched-line calls.
&K2	MNP5 enabled for switched-line calls.
&K3	V.42 and MNP4 enabled for switched-line calls.
í &K4	V.42bis and MNP5 enabled for switched-line calls.

CONFIGURATION PROFILES
Type:	Immediate
Format:	AT [cmds] &Vn [cmds]
Description:	Displays active and stored configuration profiles.
Command	Function
&V0	Displays current settings.
&V1	Displays profile 0.
&V2	Displays profile 1.
&V3	Displays profile 2.
&V4	Displays profile 3.
&V5	Displays factory defaults.

DEFAULT FALLBACK PHONE NUMBER
Type:	Register
Format:	AT [cmds] S30=n [cmds]
Default:	0
Range:	0-39
Unit:	N/A
Description:	Sets the default phone number the phone will dial when leased line goes down to memory location n. Setting S30 to 0 will disable this feature.

DEFAULT PHONE NUMBER
Type:	Configuration
Format:	AT [cmds] *Dn [cmds]
Default:	0
Range:	0-39
Unit:	N/A
Description:	Sets the default phone number to memory location n.

DEFAULT PHONE NUMBER
Type:	Register
Format:	AT [cmds] S29=n [cmds]
Default:	0
Range:	0-39
Unit:	N/A
Description:	Sets the default phone number to memory location n.

DES ENCRYPTION
Format:		AT [cmds] S89=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls DES encryption settings.
Bit	Value	Function
0	í 0 1	DES encryption disabled. DES encryption enabled.
1	í 0 1	Attempt single DES only. Attempt triple DES.
2	í 0 1	Public key system enabled. Modem will generate key. Public key system disabled. User must enter key.
3	í 0 1	Keep non-encrypted connection. Disconnect from non-encrypted connection.

DES KEY SET
Type:	Configuration
Format:	AT [cmds] CKxxxx [cmds]
Description:	Sets the key to be used for DES encryption. The key must be between 15 and 65 characters.

DIAGNOSTICS
Type:	Immediate
Format:	AT [cmds] CGn [cmds]
Description:	Performs modem diagnostics.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [; cmds]
Description:	Dials telephone number according to any modifiers included in the string.
Modifier	Function
DP	Dial in pulse mode.
DR	Dial in answer mode.
DS=n	Number in memory location n dialed.
DT	Dial in tone mode.
DW	Dialing resumed following dial tone detection.
D,	Dialing paused for amount of time specified in S8 register.
D!	Flash function initiated. Modem commanded to go on-hook for specified time.
D@	Modem waits for a ring-back signal followed by silence up to the time specified in S7 prior to executing the rest of the dial string.
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.

DIAL BACKUP
Type:	Configuration
Format:	AT [cmds] *Bn [cmds]
Description:	Selects the memory location for the dial backup. *B or *B0 will disable dial backup.

DISPLAY STORED PHONE NUMBERS
Type:	Immediate
Format:	AT [cmds] &Z? [cmds]
Description:	Displays all stored phone numbers.

ERROR CONTROL FAILURE
Type:	Configuration
Format:	AT [cmds] *En [cmds]
Description:	Configures the modem’s behavior if an error-connecting connection cannot be made.
Command	Function
í *E0	Modem will keep non-error-correcting connection.
*E1	Modem will disconnect non-error-correcting connection.

EXTENDED RING
Format:		AT [cmds] S51=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Sets operation of modem when it detects extended rings and fax rings.
Bit	Value	Function
1, 0	00 01 10 11	Extended ring tone detection disabled. Extended ring tone returns RING n twice. Extended ring tone returns RING n four times. Extended ring tone returns RING n six times.
3, 2	00 01 10	DTMF detection disabled. DTMF tone returns RING n twice. DTMF tone returns RING <digit>.
5, 4	00 01 10 11	Fax ring tone detection disabled. Fax ring tone returns RING. Fax ring tone returns RING 1. Fax ring tone returns RING 2.
7, 6	00 01 10 11	Data ring tone detection disabled. Data ring tone returns RING. Data ring tone returns RING 1. Data ring tone returns RING 3.

FAX CONNECT
Type:	Result code
Format:	CONNECT FAX/SnnnnVaTbRcLxCyP<#>
Example:	CONNECT FAX/S1440V1T1R0L1C0P(303) 555-1212
Description:	Returned by the modem when a successful fax connection has been made.
Response	Meaning
S2400	2400bps connection.
S4800	4800bps connection.
S7200	7200bps connection.
S9600	9600bps connection.
S1200	12Kbps connection.
S1440	14.4Kbps connection.
V0	Normal vertical resolution.
V1	High vertical resolution.
T0	One-dimensional coding scheme.
T1	Two-dimensional coding scheme.
R0	215mm wide (1728 pels).
R1	255mm wide (2048 pels).
R2	303mm wide (2432 pels).

FAX CONNECT (CON’T)
Response	Meaning
L0	A4 length (297mm).
L1	B4 length (364mm).
L2	Unlimited length.
C0	20ms minimum per line.
C1	5ms minimum per line.
C2	10ms minimum per line.
C3	20ms minimum per normal-resolution line, 10ms minimum per fine-resolution line.
C4	40ms minimum per line.
C5	40ms minimum per normal-resolution line, 20ms minimum per fine-resolution line.
C6	10ms minimum per normal-resolution line, 5ms minimum per fine-resolution line.
C7	No minimum time required.
P<#>	Remote fax station number.

FAX DISCONNECT
Type:	Result code
Format:	DISCONNECTn P<#>
Example:	DISCONNECT1P(303) 555-1212
Description:	Returned by the modem when the fax connection has been broken.
Response	Meaning
DISCONNECT0	Remote modem has confirmed disconnection.
DISCONNECT1	Remote modem has not confirmed disconnection.
P<#>	Remote fax station number.

FAX ENCODING
Type:	Configuration
Format:	AT [cmds] #Tn [cmds]
Description:	Sets the encoding scheme of transmitted faxes.
Command	Function
#T0	Sets one-dimensional encoding.
#T1	Sets two-dimensional encoding.

FAX LENGTH
Type:	Configuration
Format:	AT [cmds] #Ln [cmds]
Description:	Sets the length of transmitted faxes.
Command	Function
#L0	A4 length (297mm).
#L1	B4 length (364mm).
#L2	Unlimited length.

FAX MINIMUM SCAN LINE TRANSMISSION TIME
Type:	Configuration
Format:	AT [cmds] #Cn [cmds]
Description:	Sets the minimum time required for transmission of one scan line.
Command	Function
#C0	20ms minimum per line.
#C1	5ms minimum per line.
#C2	10ms minimum per line.
#C3	20ms minimum per normal-resolution line, 10ms minimum per fine-resolution line.
#C4	40ms minimum per line.
#C5	40ms minimum per normal-resolution line, 20ms minimum per fine-resolution line.
#C6	10ms minimum per normal-resolution line, 5ms minimum per fine-resolution line.
#C7	No minimum time required.

FAX MODE
Type:	Immediate
Format:	AT [cmds] #F [cmds]
Description:	Sets modem in fax mode.

FAX ORIGINATE/ANSWER MODE
Type:	Register
Format:	AT [cmds] S80=n [cmds]
Description:	Selects originate/answer for fax mode.
Command		Function
S80=0		Fax/modem operates in originate mode.
S80=1		Fax/modem operates in answer mode.

FAX RECEIVE DEVICE
Type:	Configuration
Format:	AT [cmds] +FZF=n [cmds]
Description:	Selects where the modem will store and send received fax and modem data.
Command	Function
+FZF=0	Send fax data to printer and hang up if modem data.
+FZF=1	Send fax data to printer and modem data to serial port.
+FZF=2	Send fax data to DRAM and printer, and hang up if modem data.
+FZF=3	Send fax data to DRAM and hang up if modem data.
+FZF=4	Send fax data to DRAM and printer, and hang up if modem data.
+FZF=5	Send fax data to DRAM and modem data to serial port.