U-1496/U-1496S

ZYXEL COMMUNICATIONS CORPORATION

U-1496/U-1496S

Card Type	Modem (synchronous/asynchronous)
Chip Set	Unidentified
Maximum Modem Rate	19.2Kbps
Maximum Fax Rate	14.4Kbps
Data Modulation Protocol	Bell 103A/212A CCITT V.21, V.22, V.22bis, V.23, V.26bis, V.27bis, V.29, V.32, V.32bis, V.33
Fax Modulation Protocol	ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression	MNP2-5, V.42, V.42bis
Fax Class	Class I & II
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
Menu up	BT1	Line in	CN2
Menu select left	BT2	Switched line out	CN3
Menu select right	BT3	Leased line out	CN4
Menu down/ENTER	BT4	DC power	CN5
RS-232/422	CN1	Power switch	SW1

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PWR	Red	On	Power is on
PWR	Red	Off	Power is off
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Line is ringing
DTR	Red	On	DTR signal is high
DTR	Red	Off	DTR signal is low
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

SUPPORTED COMMAND SET

Basic AT Commands

AT, ‘+++’, A/

A, B, E, H, M, P, T, V

&C, &F, &M, &R, &X, &Z

S Registers

S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11

Note: See MHI Help File for full command documentation.

Proprietary AT Command Set

REDIAL CONTINUOUSLY
Type:	Immediate
Format:	A>
Description:	Redials the last number dialed up to 9 times.
Note: Do not precede this command with AT, or follow it with any characters.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Description:	Dials telephone number according to any modifiers included in the string.
Note:	Any combination of modifiers can be used to produce the desired dial functions in sequence.
Command	Function
DL	Re-dial last number
DP	Pulse dialing enabled
DR	Answer mode enabled; originate mode disabled following handshake initiation.
DS=n	Dial stored telephone number n
DT	Tone dialing enabled/Pulse dialing disabled
DW	Dialing resumed after a second dial tone detected.
D,	Dialing paused for amount of time specified in S8 register.
D!	Flash function initiated. Modem commanded to go off-hook for specified time before returning on-hook.
D@	Wait for 5 seconds of silence, then proceed.
D;	Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command.
Note: Dialing digits are 0-9, #. *

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested.
Command	Function
I0	Reports modem product code
I1	Reports ROM checksum and product information
I2	Reports link diagnostic status report

SPEAKER VOLUME
Type:	Configuration
Format:	AT [cmds] Ln [cmds]
Default:	4
Range:	0 - 7
Description:	Sets the speaker volume.

RING VOLUME
Type:	Configuration
Format:	AT [cmds] Nn [cmds]
Default:	5
Range:	0 - 7
Description:	Sets the ring volume.
Note: Setting of 0 will disable ring volume.

RETURN ON-LINE
Type:	Immediate
Format:	AT [cmds] O
Description:	Returns modem on-line.

RESULT CODES
Type:		Configuration
Format:		AT [cmds] Qn [cmds]
Description:		Enables modem to send result codes to the DTE.
Command		Function
»	Q0	Result code sending enabled
	Q1	Result code sending disabled
	Q2	Result code sending disabled in answer mode if S40.1=1

STATUS REGISTER R TO VALUE N
Type:	Configuration
Format:	AT [cmds] Sr=n
Range:	0-255
Description:	S-register r is set to value n.

REPORT VALUE OF STATUS REGISTER R
Type:	Immediate
Format:	AT [cmds] Sr?
Description:	Reports value of S-register r.

BIT B TO VALUE N (STATUS REGISTER R)
Type:	Configuration
Format:	AT [cmds] Sr.b=n
Range:	0, 1 (binary digit)
Description:	Bit b of S-register r is set to value n.

REPORT VALUE OF BIT B (STATUS REGISTER R)
Type:	Immediate
Format:	AT [cmds] Sr.b=n
Range:	0, 1 (binary digit)
Description:	Reports value of bit b of S-register r.

RESULT CODES
Type:		Configuration
Format:		AT [cmds] Xn [cmds]
Description:		Selects which result codes will be displayed.
Command		Function
	X0	Basic result codes only enabled.
	X1	Basic and connection speed result codes enabled.
	X2	Basic and connection speed result codes and dialtone detection enabled.
	X3	All result codes except dialtone detection enabled.
	X4	All result codes enabled.
»	X5	All result codes plus DTE speed and error control level enabled.
	X6	All result codes plus ARQ enabled.
	X7	All result codes plus ARQ and error control level enabled.

SOFT RESET
Type:	Immediate
Format:	AT [cmds] Zn [cmds]
Description:	Restores modem profiles previously saved in non-volatile RAM using the &W command.
Command	Function
Z0	Restore profile 0
Z1	Restore profile 1
Z2	Restore profile 2
Z3	Restore profile 3
Z4	Restore factory defaults and use them as power-on defaults.

DTE RATE
Type:		Configuration
Format:		AT [cmds] &Bn [cmds]
Description:		Selects modem serial port speed.
Command		Function
	&B0	DTE speed set in accordance with link rate. Determined by S44.6
»	&B1	DTE Speed is fixed regardless of link rate. Determined by S44.6

DATA TERMINAL READY (DTR)
Type:		Configuration
Format:		AT [cmds] &Dn [cmds]
Description:		Selects modem response to DTR.
Command		Function
	&D0	Modem does not respond to DTR.
	&D1	Modem dials the specified default dial number (set in modem options submenu) on an off-on DTR toggle. The modem disconnects on an on-off DTR toggle.
»	&D2	Modem goes to command mode and disconnects (hangs up) on DTR toggle.
	&D3	Modem goes to command mode, disconnects and initializes on DTR toggle.
Note: If system does not support a DTR signal at serial port connector then &D0 setting should be used.

GUARD TONE
Type:		Configuration
Format:		AT [cmds] &Gn [cmds]
Description:		Commands the modem to transmit a guard tone in V.22/V.22bis.
Note:		Used primarily for international data transmission.
Command		Function
»	&G0	Guard tone disabled
	&G1	Not used
	&G2	1800Hz guard tone enabled

FLOW CONTROL
Type:		Configuration
Format:		AT [cmds] &Hn [cmds]
Description:		Selects the type of flow control to use.
Command		Function
	&H0	Flow control disabled
»	&H3	Hardware flow control enabled
	&H4	Software flow control enabled
	&H5	Not used

JACK TYPE
Type:		Configuration
Format:		AT [cmds] &Jn [cmds]
Description:		Selects jack type.
Command		Function
»	&J0	Sets modem for RJ11 single-line jack type.
	&J1	Sets modem for RJ12 or RJ13 multiple-line jack type.

COMPRESSION & ERROR CORRECTION MODE
Type:		Configuration
Format:		AT [cmds] &Kn [cmds]
Description:		Enables levels of MNP and V.42 error correction and compression.
Command		Function
	&K0	Error correction and compression disabled
	&K1	MNP4 and below enabled
	&K2	MNP5 and below enabled
	&K3	V.42, MNP4 and below enabled
»	&K4	V.42bis, V.42, MNP5 and below enabled

LINE TYPE
Type:		Configuration
Format:		AT [cmds] &Ln [cmds]
Description:		Selects line type.
Command		Line Type
»	&L0	Switched line
	&L1	2-wire leased-line
	&L2	4-wire leased line

PROTOCOL/SPEED
Type:		Configuration
Format:		AT [cmds] &Nn [cmds]
Description:		Selects the current protocol and speed.
Command		Mode
»	&N0	Auto-select fastest common protocol.
	&N1	V.33 14.4Kbps
	&N2	V.33 12Kbps
	&N3	V.32 9600bps trellis coded
	&N4	V.32 9600bps
	&N5	V.32 4800bps
	&N6	V.29 9600bps
	&N7	V.29 7200bps
	&N8	V.29 4800bps
	&N9	V.27bis 4800bps
	&N10	V.27bis 2400bps
	&N11	V.26bis 2400bps
	&N12	V.23 1200/75bps
	&N13	V.23 600/75bps
	&N14	V.22bis 2400/1200bps
	&N15	V.22 1200bps
	&N16	V.21 300bps
	&N17	V.32bis 14.4Kbps
	&N18	V.32bis 12Kbps
	&N19	V.32bis 7200bps
	&N24	Bell 212A 1200bps
	&N25	Bell 103A 300bps
	&N32	FAX mode
	&N34	ZyXEL 19.2Kbps
	&N35	ZyXEL 16.8Kbps
	&N36	ZyXEL 14.4Kbps
	&N37	ZyXEL 12Kbps
	&N38	ZyXEL 9600bps
	&N39	ZyXEL 7200bps
	&N42	ZyCELL 14.4Kbps
	&N43	ZyCELL 12Kbps
	&N44	ZyCELL 9600bps
	&N45	ZyCELL 7200bps
	&N46	ZyCELL 4800bps

PULSE DIALING RATIO
Type:		Configuration
Format:		AT [cmds] &Pn [cmds]
Description:		Selects pulse dial make/break ratio.
Command		Function
»	&P0	39%:61%
	&P1	33%:67%

DSR OPTIONS
Type:		Configuration
Format:		AT [cmds] &Sn [cmds]
Description:		Selects when DRS is enabled.
Command		Function
»	&S0	DSR forced high
	&S1	DSR high only while handshaking. Set in accordance with S41.5 & S44.4.

RDL REQUEST
Type:		Configuration
Format:		AT [cmds] &Tn [cmds]
Description:		Selects RDL request.
Command		Function
	&T4	Remote digital loopback test request is accepted from the remote modem
»	&T5	Remote digital loopback test request is ignored from the remote modem
Note: Set when remote configuration needed.

CONFIGURATION PROFILES
Type:	Immediate
Format:	AT [cmds] &V [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

STORE ACTIVE PROFILE
Type:	Immediate
Format:	AT [cmds] &Wn [cmds]
Description:	Writes the values for the active profile into the non-volatile RAM.
Command	Function
&W0	Write the active profile to stored profile 0
&W1	Write the active profile to stored profile 1
&W2	Write the active profile to stored profile 2
&W3	Write the active profile to stored profile 3

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.
»	&Y1	Break does not empty buffer and is sent immediately.
	&Y2	Break does not empty buffer and is not sent immediately.

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

DIAL BACKUP
Type:	Configuration
Format:	AT [cmds] *Bn [cmds]
Range:	1 - 9
Description:	Selects the memory location for the dial backup.
Note: *B0 will disable dial backup.

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

DEFAULT DIAL
Type:	Configuration
Format:	AT [cmds] *Dn [cmds]
Default:	0
Range:	0 - 9
Description:	Configures the phone numbers in the dial memory menu.

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

REMOTE CONFIGURATION REQUEST
Type:		Configuration
Format:		AT [cmds] *Fn [cmds]
Description:		Sets the modem to accept or deny requests for remote configuration.
Command		Function
»	*F0	Deny remote configuration request.
	*F1	Grant remote configuration request. &T4 must also be set.

SECURITY CONFIGURATION
Type:		Configuration
Format:		AT [cmds] *Gn [cmds]
Description:		Sets security mode and options.
Command		Function
»	*G0	Security disabled
	*G1	Security type I and password check enabled
	*G2	Security type I, callback, and password check enabled
	*G3	Security type II and password check enabled
	*G4	Security type II, callback, and password check enabled
	*G5	Security type II, callback, and password check enabled. Callback number sent by remote.

PASSWORD TABLE
Type:	Immediate
Format:	AT [cmds] *Hn [cmds]
Description:	Changes password entry n.
Note: Requires supervisory password.

PASSWORD FOR SUPERVISOR
Type:	Immediate
Format:	AT [cmds] *HS [cmds]
Description:	Changes supervisory password.
Note: Requires current supervisory password.

COMMAND MODE TYPE
Type:		Configuration
Format:		AT [cmds] *In [cmds]
Description:		Selects the command set the modem will use.
Command		Function
»	*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.

PANEL KEY
Type:		Configuration
Format:		AT [cmds] *Ln [cmds]
Description:		Locks the front panel key.
Command		Function
»	*L0	Key unlocked
	*L1	Key locked

LEASED-LINE AUTO-HANDSHAKE
Type:		Configuration
Format:		AT [cmds] *Mn [cmds]
Description:		Selects which modem performs the auto-handshaking.
Command		Function
»	*M0	Originating modem auto-handshakes
	*M1	Answering modem auto-handshakes

LEASED-LINE TRANSMISSION ATTENUATION
Type:	Immediate
Format:	AT [cmds] *Pn [cmds]
Default:	9
Range:	0 - 15
Unit:	-1 dBm
Description:	Sets the attenuation for transmission when in leased-line mode.

POOR SIGNAL QUALITY REACTION
Type:		Configuration
Format:		AT [cmds] *Qn [cmds]
Description:		Configures the modem's reaction to poor signal quality.
Command		Function
	*Q0	Modem does nothing during poor signal quality.
	*Q1	Modem retrains during poor signal quality.
»	*Q2	Modem fall-back during poor signal quality, and fall-forward when signal improves.
	*Q3	Modem will disconnect during poor signal quality.

READ PROFILE FROM REMOTE
Type:	Immediate
Format:	AT [cmds] *Rmn [cmds]
Description:	Reads configuration n from the remote modem and stores it in local profile m.
Command	Function
0	Stored profile 0
1	Stored profile 1
2	Stored profile 2
3	Stored profile 3
4	Active configuration; may be applied only to remote.
5	Factory defaults; may be applied only to remote.

SECONDARY CHANNEL
Type:		Configuration
Format:		AT [cmds] *Sn [cmds]
Description:		Selects the secondary channel.
Command		Function
»	*S0	Secondary channel disabled
	*S1	Secondary channel enabled

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

PASSWORD TABLE DISPLAY
Type:	Immediate
Format:	AT [cmds] *V [cmds]
Description:	Displays the password table.
Note: The supervisor password must be entered to execute this command.

WRITE PROFILE TO REMOTE
Type:	Immediate
Format:	AT [cmds] *Wmn [cmds]
Description:	Reads configuration n from the local modem and stores it in remote profile m.
Command	Function
0	Stored profile 0
1	Stored profile 1
2	Stored profile 2
3	Stored profile 3
4	Active configuration; may be applied only to local.
5	Factory defaults; may be applied only to local.

FAX RECEIVE MODE
Type:		Configuration
Format:		AT [cmds] #Bn [cmds]
Description:		Configures the operation of the modem when receiving faxes.
Command		Function
»	#B0	Fax data follows immediately after connection parameters.
	#B1	Fax data is separated from connection parameters by DC2 (ASCII 24) character.
	#B2	Fax data is not transmitted until receiving modem requests it.

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 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 STATION PHONE NUMBER
Type:	Immediate
Format:	AT [cmds] #P<#> [cmds]
Description:	Sets what the modem will report as its phone number to the remote fax machine.

FAX WIDTH
Type:	Configuration
Format:	AT [cmds] #Rn [cmds]
Description:	Sets the width of transmitted faxes.
Command	Function
#R0	215mm wide (1728 pels)
#R1	255mm wide (2048 pels)
#R2	303mm wide (2432 pels)

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 RESOLUTION
Type:	Configuration
Format:	AT [cmds] #Vn [cmds]
Description:	Sets the vertical resolution of transmitted faxes.
Command	Function
#V0	Sets normal resolution
#V1	Sets high resolution

HELP SCREENS
Type:	Immediate
Format:	AT [cmds] $ [cmds]
Description:	Shows command help screens for all commands beginning with the given prefix, or no prefix if none is given.
Command	Function
$	Shows ATx help screen
&$	Shows AT&x help screen
*$	Shows AT*x help screen

MODE SELECTION
Type:	Configuration
Format:	AT [cmds] +FCLASS=n [cmds]
Description:	Sets what mode the modem will operate in.
Command	Function
n=0	Data mode
n=2	Class 2 fax mode
n=2.0	Class 2.0 fax mode
n=6	ZyXELfax mode
n=8	Voice mode

TONE GENERATOR LENGTH
Type:	Immediate
Format:	AT [cmds] +VBT=n [cmds]
Range:	0 - 255
Unit:	0.1 second
Description:	Sets the length of DTMF tones that are generated.

VOICE INITIALIZE SETTINGS
Type:	Configuration
Format:	AT [cmds] +VIP=n [cmds]
Description:	Resets all voice mode settings to factory defaults.

VOICE INACTIVITY TIMER
Type:	Configuration
Format:	AT [cmds] +VIT=n [cmds]
Range:	0-255
Unit:	1 second
Description:	Sets the length of time that the modem does not receive any voice data before it returns to command mode.

VOICE DEVICE
Type:	Configuration
Format:	AT [cmds] +VLS=n [cmds]
Description:	Selects the I/O device for the DSP chip.
Command	Function
n=0	Voice I/O disabled
n=2	Phone line
n=8	External microphone
n=16	Internal speaker

VOICE AUTO-DISCONNECT
Type:	Configuration
Format:	AT [cmds] +VNH=n [cmds]
Description:	Configures the auto-disconnect mode.
Command	Function
n=0	Auto-disconnect disabled
n=1	Auto-disconnect enabled
n=2	Auto-disconnect enabled, but ATH disables auto-disconnect and does not hang up.

VOICE RE-RING DETECT TIME
Type:	Configuration
Format:	AT [cmds] +VRA=n [cmds]
Default:	70
Range:	0-255
Unit:	1 second
Description:	Sets the maximum time the modem will wait for the remote station to ring again before it assumes that it has gone off-hook.

VOICE RING DETECT
Type:	Configuration
Format:	AT [cmds] +VRN=n [cmds]
Range:	0-255
Unit:	1 second
Description:	Sets the maximum time the modem will wait for the remote station to ring before it assumes that it went off-hook before it rang.

VOICE RECEIVE
Type:	Immediate
Format:	AT [cmds] +VRX
Description:	Begins receiving voice data.

VOICE SILENCE DETECTION
Type:	Configuration
Format:	AT [cmds] +VSD=m,n [cmds]
Range:	m 0-31, n 0-255
Unit:	m 1 dB, n .1 second
Description:	Sets the threshold of silence detection (m) and the minimum period of silence required to be detected (n).

COMPRESSION
Type:	Configuration
Format:	AT [cmds] +VSM=n [cmds]
Description:	Selects the compression type to be used for voice data storage.
Command	Function
n=1	Select 9.6Kbps Code Excited Linear Prediction compression.
n=2	Select 19.2Kbps 2-bit ADPCM compression.
n=3	Select 28.8Kbps 3-bit ADPCM compression.

VOICE RESYNC CLOCK
Type:	Configuration
Format:	AT [cmds] +VSY=n [cmds]
Range:	1-255
Unit:	50 ms
Description:	Sets the time between resync signals in the stored voice data.

TONE GENERATOR (PHONE KEYS)
Type:	Immediate
Format:	AT [cmds] +VTS=a
Range:	0-9, A-D, #, *
Description:	Generates the DTMF tone for the characters in the string for the duration set with +VBT.

TONE GENERATOR (TIMED PHONE KEYS)
Type:	Immediate
Format:	AT [cmds] +VTS={a, n}
Range:	a 0-9, A-D, #, *; x 0-255
Unit:	x .1 second
Description:	Generates the DTMF tone for duration x for the character a.

TONE GENERATOR (DIRECT ENTRY)
Type:	Immediate
Format:	AT [cmds] +VTS=[m, n, x]
Range:	m 200-3300, n 200-3300, x 0-255
Unit:	m 1 Hz, n 1 Hz, x .1 second
Description:	Generates a dual-frequency tone for duration x at frequencies m and n.

VOICE TRANSMIT
Type:	Immediate
Format:	AT [cmds] +VTX
Description:	Begins transmitting voice data.

VOICE OFF-HOOK SENSITIVITY
Type:	Configuration
Format:	AT [cmds] +VVT=n [cmds]
Default:	16
Range:	0-255
Description:	Sets the sensitivity of detection of the remote site going off-hook.
Note: Lower numbers are more sensitive.

S(status) -REGISTERS

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

MANUFACTURE CAPTURE
Type:	Register
Format	AT [cmds] S13=n [cmds]
Default:	0
Range:	0, 2
Description:	Selects whether to attempt to capture the manufacturer of the other modem during handshaking.
Command	Function
S13=0	Manufacture capture disabled
S13=2	Manufacture capture enabled

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

BIT-MAPPED REGISTER S15
Format:		AT [cmds] S15=n [cmds]
Default:		130
Unit:		Bit-mapped
Description:		Controls active profile and character length.
Bit	Value	Function
1, 0	00 01 10	Use even polarity Use odd polarity Do not use polarity
2	0 1	Use 1 stop bit Use 2 stop bits
4, 3	00 01 10 11	Use 10-bit characters Use 11-bit characters Use 9-bit characters Use 8-bit characters
7, 6, 5	000 001 010 011 100	Profile 0 active Profile 1 active Profile 2 active Profile 3 active Profile 4 active

TEST STATUS
Type:	Register
Format	AT [cmds] S16? [cmds]
Default:	0
Range:	0, 1, 3, 6 - 8
Description:	Indicates self-test diagnostics currently in progress.
Command	Function
S16=0	No test in progress.
S16=1	Modem is performing analog loopback test.
S16=3	Modem is performing local digital loopback test.
S16=6	Modem is performing remote digital loopback test.
S16=7	Modem is performing remote digital loopback and self-test.
S16=8	Modem is performing analog loopback and self-test.

BIT-MAPPED REGISTER S17
Type:		Register
Format:		AT [cmds] S17=n [cmds]
Default:		18
Unit:		Bit-mapped
Description:		Controls command set type, dialing mode, leased line transmit attenuation, and secondary networking channel.
Bit	Value	Function
0	0 1	Secondary channel disabled Secondary channel enabled
4, 3, 2, 1	0000 ... 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	0 1	Originate mode Answer mode
7, 6	00 01 10	AT command set enabled V.25bis command set enabled Command sets disabled

LOCAL SERIAL PORT SPEED
Type:	Register
Format	AT [cmds] S18=n [cmds]
Default:	0
Range:	0 - 16
Description:	Sets serial port speed when modem auto-answers an incoming call.
Command	Function
S18=0	Disabled
S18=1	Sets 57.6Kbps speed
S18=2	Sets 38.4Kbps speed
S18=3	Sets 19.2Kbps speed
S18=4	Sets 16.8Kbps speed
S18=5	Sets 14.4Kbps speed
S18=6	Sets 12Kbps speed
S18=7	Sets 9600bps speed
S18=8	Sets 7200bps speed
S18=9	Sets 4800bps speed
S18=10	Sets 3600bps speed
S18=11	Sets 2400bps speed
S18=12	Sets 1800bps speed
S18=13	Sets 1200bps speed
S18=14	Sets 600bps speed
S18=15	Sets 300bps speed
S18=16	Sets 76.8Kbps speed

PROTOCOL/SPEED
Type:	Register
Format	AT [cmds] S19=n [cmds]
Default:	0
Range:	0 - 19, 24, 25, 32, 34 - 39, 42 - 46
Description:	Selects the current protocol and speed.
Command	Function
S19=0	Auto-select fastest common protocol.
S19=1	V.33 14.4/12Kbps
S19=2	V.33 12Kbps
S19=3	V.32 9600bps/7200bps/4800bps
S19=4	V.32 9600bps/7200bps/4800bps
S19=5	V.32 4800bps
S19=6	V.29 9600bps
S19=7	V.29 7200bps
S19=8	V.29 4800bps
S19=9	V.27bis 4800bps
S19=10	V.27bis 2400bps
S19=11	V.26bis 2400bps
S19=12	V.23 1200bps/75bps
S19=13	V.23 600bps/75bps
S19=14	V.22bis 2400bps/1200bps
S19=15	V.22 1200bps
S19=16	V.21 300bps
S19=17	V.32bis 14.4Kbps/12Kbps/9600bps/7200bps/4800bps
S19=18	V.32bis 12Kbps/9600bps/7200bps/4800bps
S19=19	V.32bis 7200bps/4800bps
S19=24	Bell 212A 1200bps
S19=25	Bell 103 300bps
S19=32	V.17/V.29/V.27ter FAX 14.4Kbps/12Kbps/9600bps/7200bps/4800bps/2400bps
S19=34	ZyXEL 19.2Kbps
S19=35	ZyXEL 16.8Kbps
S19=36	ZyXEL 14.4Kbps
S19=37	ZyXEL 12Kbps
S19=38	ZyXEL 9600bps
S19=39	ZyXEL 7200bps
S19=42	ZyCELL 14.4Kbps
S19=43	ZyCELL 12Kbps
S19=44	ZyCELL 9600bps
S19=45	ZyCELL 7200bps
S19=46	ZyCELL 4800bps

LOCAL SERIAL PORT SPEED
Type:	Register
Format	AT [cmds] S20=n [cmds]
Default:	2
Range:	0 - 15
Description:	Sets serial port speed.
Command	Function
S20=0	76.8Kbps speed
S20=1	57.6Kbps speed
S20=2	38.4Kbps speed
S20=3	19.2Kbps speed
S20=4	16.8Kbps speed
S20=5	14.4Kbps speed
S20=6	12Kbps speed
S20=7	9.6Kbps speed
S20=8	7.2Kbps speed
S20=9	4.8Kbps speed
S20=10	3.6Kbps speed
S20=11	2.4Kbps speed
S20=12	1.8Kbps speed
S20=13	1.2Kbps speed
S20=14	600bps speed
S20=15	300bps speed

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Default:		178
Unit:		Bit-mapped
Description:		Controls DTR, CTS, CD, and DSR signals, speaker, and error correction.
Bit	Value	Function
0	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 01 10 11	Speaker disabled Speaker enabled until carrier signal detected. Speaker enabled Speaker enabled following dialing, then disabled after carrier signal detected.
3	0 1	DSR forced high DSR normal
4	0 1	CD forced high CD normal
5	0 1	CTS follows RTS when in synchronous mode CTS forced high when in synchronous mode.
7, 6	00 01 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
Unit:		Bit-mapped
Description:		Controls result codes, dialing, and echo.
Bit	Value	Function
0	0 1	Command echoing disabled Command echoing enabled
1	0 1	Dial in tone mode Dial in pulse mode
2	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	000 001 010 011 100 101 110 111	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 Error control codes enabled Error control codes enabled Error control codes enabled
6	0 1	Display result codes in numeric form Display result codes in verbose form
7	0 1	Result codes enabled Result codes disabled

BIT-MAPPED REGISTER S24
Format		AT [cmds] S24=n [cmds]
Default:		138
Unit:		Bit-mapped
Description:		Controls speaker volume and ring volume.
Bit	Value	Function
3, 2, 1	000 001 010 011 100 101 110 111	Ring volume off Ring volume low ... ... Ring volume medium ... ... Ring volume high
7, 6, 5	000 001 010 011 100 101 110 111	Speaker volume off. Speaker volume low ... ... Speaker volume medium ... ... Speaker volume high

DTR TIMEOUT
Type:	Register
Format:	AT [cmds] S26=n [cmds]
Default:	0
Range:	0 - 9
Unit:	10 ms
Description:	Sets the delay time in synchronous mode between the RTS and modems CTS response.

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27=n [cmds]
Default:		156
Unit:		Bit-mapped
Description:		Controls reaction to poor signal quality, flow control, and error correction.
Bit	Value	Function
2, 1, 0	000 001 010 011 100	Error correction disabled MNP4 enabled MNP4 + MNP5 enabled V.42 + MNP4 enabled V.42 + V.42bis enabled
5, 4, 3	000 001 010 011 100 101	Flow control disabled Reserved Reserved Hardware CTS/RTS flow control enabled Software XON/XOFF flow control enabled Reserved
7, 6	00 01 10 11	Modem does nothing during poor signal quality. Modem restrains 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
Unit:		Bit-mapped
Description:		Controls jack type, front panel lock, break type, guard tone, local serial port speed lock, and 1200bps protocol.
Bit	Value	Function
0	0 1	Sets modem for RJ11 single-line jack type. Sets modem for RJ12 or RJ13 multiple-line jack type.
1	0 1	Panel key normal Panel key locked
3, 2	00 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	00 01 10	Guard tone disabled Reserved 1800 Hz guard tone
6	0 1	Local serial port speed follows connect speed Local serial port speed locked at DTE setting
7	0 1	Sets V.22 as 1200bps protocol Sets Bell 212/A as 1200bps protocol

DEFAULT PHONE NUMBER
Type:	Register
Format:	AT [cmds] S29=n [cmds]
Default:	0
Range:	0 - 9
Description:	Sets the default phone number to memory location n.

DEFAULT FALLBACK PHONE NUMBER
Type:	Register
Format:	AT [cmds] S30=n [cmds]
Default:	0
Range:	0 - 9
Description:	Sets the default phone number the phone will dial when leased line goes down to memory location n.
Note: Setting S30 to 0 will disable this feature.

LEASED LINE RETRY TIME
Type:	Register
Format:	AT [cmds] S34=n [cmds]
Default:	30
Unit:	1 minute
Description:	When leased line is down, sets the time between checks on whether it is functioning again.

BIT-MAPPED REGISTER S35
Format		AT [cmds] S35=n [cmds]
Default:		32
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	0 1	4800bps V.32 normal Use ZyCELL 4800bps trellis coded instead of 4800bps V.32
1	0 1	Handshake can be interrupted Handshake cannot be interrupted
2	0 1	V.26bis normal V.26bis mode A
3	0 1	Leased line transmission level normal Leased line transmission is attenuated by 12dBm
4	N/A	Not used
5	0 1	V.42 Selective Reject disabled V.42 Selective Reject enabled
6	0 1	Profile password protection disabled Profile password protection enabled
7	0 1	Connection speed result codes disabled on error correcting connection. Connection speed result codes 30 to 39 enabled on error correcting connection.

BIT-MAPPED REGISTER S36
Format		AT [cmds] S36=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Controls security and remote profiles.
Bit	Value	Function
0	0 1	Deny remote request for current configuration Grant remote request for current configuration
1	0 1	Allow request to copy local profile to remote profile. Profiles set with S37. Allow request to copy remote profile to local profile. Profiles set with S37.
4, 3, 2	N/A	Reserved
7, 6, 5	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.
Note: Security type 1: Remote modem must be a ZyXEL modem. Security type 2: Remote modem of any kind.

LOCAL/REMOTE CONFIGURATION SELECTION
Type:		Register
Format:		AT [cmds] S37=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Selects local and remote profiles for copying.
Bit	Value	Function
2, 1, 0	000 001 010 011 100 101	local profile 0 Select local profile 1 Select local profile 2 Select local profile 3 Select current local configuration Select local factory defaults
3	0	Not used
6, 5, 4	000 001 010 011 100 101	Select remote profile 0 Select remote profile 1 Select remote profile 2 Select remote profile 3 Select current remote configuration Select remote factory defaults

BIT-MAPPED REGISTER S38
Format		AT [cmds] S38=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Controls auto-dial, CD signal, fax auto-answer, and MNP5.
Bit	Value	Function
0	0 1	Auto-dial of default number disabled Auto-dial of default number enabled
2, 1	N/A	Reserved
3	0 1	CD normal CD according to UNIX standard
4	0 1	Fax auto-answer enabled Fax auto-answer disabled
5	0 1	MNP5 enabled MNP5 disabled
7, 6	N/A	Reserved

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

BIT-MAPPED REGISTER S40
Format		AT [cmds] S40=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Controls extended ring detection and result codes.
Bit	Value	Function
0	N/A	Reserved
1	0 1	Modem returns result codes Modem does not return result codes
2	0 1	Disabled caller ID Enable called ID
3	0 1	Ring type 1 detection disabled Ring type 1 detection enabled
4	0 1	Ring type 2 detection disabled Ring type 2 detection enabled
5	0 1	Ring type 3 detection disabled Ring type 3 detection enabled
6	0 1	Ring type 4 detection disabled Ring type 4 detection enabled
7	N/A	Reserved

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

BIT-MAPPED REGISTER S42
Format		AT [cmds] S42=n [cmds]
Default:		0
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	0 1	Secondary channel 2400/75bps Secondary channel 2400bps
1	0 1	Throughput averaging disabled Throughput averaging enabled
2	0 1	CND message is off even if ATQ2 is set CND message is on even if ATQ2 is set
3	0 1	Escape sequence enabled in answer mode Escape sequence disabled in answer mode
4	0 1	V.17 fax enabled in calling mode V.17 fax disabled in calling mode
5	0 1	Data/Voice switch enabled Data/Voice switch disabled
6	0 1	Enable RING result Disable RING result
7	0 1	CD forced high CD pulses off for 1/2 second at carrier loss

BIT-MAPPED REGISTER S43
Format		AT [cmds] S43=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Selects active proprietary protocols.
Bit	Value	Function
0	0 1	Enable ZyXEL 16.8Kbps in Multi-Auto mode. Disable ZyXEL 16.8Kbps in Multi-Auto mode.
1	0 1	Enable ZyXEL 19.2Kbps in Multi-Auto mode. Disable ZyXEL 19.2Kbps in Multi-Auto mode.
2	0 1	Enable ZyCELL Auto Transmit Power Adjustment mode as set in S49b0-3. Disable ZyCELL Auto Transmit Power Adjustment mode.
3	0 1	ZyCELL protocols enabled ZyCELL protocols disabled
7, 6, 5, 4	N/A	Not Used

BIT-MAPPED REGISTER S44
Format		AT [cmds] S44=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Controls dial backup, cyclic dial, DSR, V.13 simulation, and DTE speed.
Bit	Value	Function
1, 0	N/A	Not Used
2	0 1	Dial backup executed automatically. Dial backup waits for panel input.
3	0 1	Cyclic dial disabled Cyclic dial enabled with ATDSn
4	0 1	DSR normal DSR follows DTR
5	0 1	V.13 simulation disabled V.13 simulation enabled
6	0 1	DTE speed determined normally DTE speed is locked at 19.2Kbps if link is 9600bps or faster, at 9600bps if link is 7200bps, and at link speed below 7200bps. DTE speed locked if ARQ link, and follows link speed otherwise.
7	N/A	Not Used

CALLER ID SILENCE DELAY
Type:	Register
Format:	AT [cmds] S45=n [cmds]
Default:	87
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
Unit:	20ms
Description:	Time period for which silence must be detected for Called ID information to be processed.

CDN INFORMATION
Type:	Register
Format:	AT [cmds] S48=n [cmds]
Default:	0
Description:	When disabled, Caller ID information will be displayed as raw data.

CELLULAR MODE
Format:		AT [cmds] S49=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Controls cellular transmission attenuation and cellular function.
Bit	Value	Function
3 - 0	0000 ... 1111	Sets cellular transmit attenuation level to -9dBm ... Sets cellular transmit attenuation level to -24dBm
6, 5, 4	N/A	Not Used
7	0 1	Cellular mode over phone lines Cellular mode through cellular phone

INACTIVITY TIMER
Type:	Register
Format:	AT [cmds] S50=n [cmds]
Unit:	10 seconds
Description:	Sets the length of time that the modem does not receive information before it disconnects.

BIT-MAPPED REGISTER S51
Format		AT [cmds] S51=n [cmds]
Default:		0
Unit:		Bit-mapped
Description:		Sets operation of modem when it detects extended rings and fax rings.
Bit	Value	Function
2, 1, 0	000 001 010 011 100 101 110 111	Extended ring tone detection disabled. Extended ring tone returns RING n. Extended ring tone returns RING n twice. Extended ring tone returns RING n three times. Extended ring tone returns RING n four times. Extended ring tone returns RING n five times. Extended ring tone returns RING n six times. Extended ring tone returns RING n seven times.
5, 4, 3	000 001 010 011 100 101 110 111	Fax ring tone detection disabled. Fax ring tone returns RING. Fax ring tone returns RING 1. Fax ring tone returns RING 2. Fax ring tone returns RING 3. Fax ring tone returns RING 4. Fax ring tone returns RING 5. Fax ring tone returns RING 6.
7, 6	N/A	Not Used

Result Codes

FAX CONNECT
Type:	Result code
Format:	CONNECT FAX/SnnnnVaTbRcLxCyP<#>
Description:	Returned by the modem when a successful fax connection has been made.
Response	Description
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)
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<#>
Description:	Returned by the modem when the fax connection has been broken.
Response	Description
DISCONNECT0	Remote modem has confirmed disconnection.
DISCONNECT1	Remote modem has not confirmed disconnection.
P<#>	Remote fax station number

VOICE CONNECT
Type:	Result code
Format:	VCON
Description:	Returned by the modem when a voice connection has been made.