MICROLINK ISDN/TL PRO modem/telephone/ISDN Settings and Configuration

Card Type	ISDN TA
Chip Set	Unidentified
I/O Options	Power connector power switch, DTE port, ISDN interface (RJ-11)
ISDN Data Rate	230.4Kbps
ISDN Modulation Protocol	V.110, V.120, X.75, PPP, T - online
Error Correction/Compression	MNP5, V.42bis
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
AC power connector	CN1	ISDN interface (RJ-11 connector)	CN3
25-pin DTE serial port	CN2	Power switch	SW1

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PWR	Unidentified	On	Power is on
PWR	Unidentified	Off	Power is off
STS	Unidentified	On	ISDN link is good
STS	Unidentified	Blinking	ISDN link negotiation in progress
STS	Unidentified	Off	ISDN link is broken
LNE	Unidentified	On	Connection is being established
LNE	Unidentified	Blinking (slow)	Incoming call is received, but incompatible with unit
LNE	Unidentified	Blinking (fast)	Incoming call not yet accepted
LNE	Unidentified	Off	Connection is broken
TX	Unidentified	On	MICROLINK ISDN/TL PRO is receiving data from remote or DTE
TX	Unidentified	Off	MICROLINK ISDN/TL PRO is not receiving data from remote or DTE
RX	Unidentified	On	MICROLINK ISDN/TL PRO is transmitting data from remote or DTE
RX	Unidentified	Off	MICROLINK ISDN/TL PRO not transmitting data from remote or DTE
DTR	Unidentified	On	Terminal/computer ready for operation
DTR	Unidentified	Off	Terminal/computer not ready for operation
DSR	Unidentified	On	MICROLINK ISDN/TL PRO ready for operation
DSR	Unidentified	Off	MICROLINK ISDN/TL PRO ready for operation
RTS	Unidentified	On	Sending device is enabled
RTS	Unidentified	Off	Sending device is disabled
CTS	Unidentified	On	MICROLINK ISDN/TL PRO ready to send data
CTS	Unidentified	Off	MICROLINK ISDN/TL PRO not ready to send data
DCD	Red	On	V.110, V.100 or PPP connection established
DCD	Green	On	V.120, X.75, MNP5, V.42bis error correction connection established
DCD	Orange	On	Channel building enabled
DCD	N/A	Off	ISDN modulation protocol not established
TST	Unidentified	On	MICROLINK ISDN/TL PRO is performing a self diagnostic test
TST	Unidentified	Off	MICROLINK ISDN/TL PRO is not performing a self diagnostic test

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

A, E, V, Z

&F, &V, &W

Extended AT Commands

\T, \X

S Registers

S0, S1, S2, S3, S4, S5, S12, S30

Note: See MHI Help File for full command documentation.

CHANNEL BUNDLING
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects channel bundling mode
Command	Mode
í&N0	Channel bundling disabled
&N1	Channel bundling enabled

COMMUNICATIONS MODE
Type:	Configuration
Format:	AT [cmds] &Mn [cmds]
Description:	Selects communications mode
Command	Mode
&M0	Asynchronous mode
&M1	Synchronous connect mode
&M2	Synchronous connect mode and set DTR high.

DATA CARRIER DETECT (DCD)
Type:	Configuration
Format:	AT [cmds] &Cn [cmds]
Description:	Selects whether the DCD option is enabled or disabled
Command	Function
&C0	DCD enabled
í&C1	DCD enabled after carrier signal detected
&C2	DCD dropped during disconnection

DATA SET READY (DSR)
Type:	Configuration
Format:	AT [cmds] &Sn [cmds]
Description:	Selects DSR options
Command	Function
&S0	DSR forced high
&S1	DSR indicates B-channel switched through

DATA TERMINAL READY (DTR)
Type:		Configuration
Format:		AT [cmds] &Dn [cmds]
Description:		Selects modem response to DTR
Command	Command State		Connection Establishment	Existing Connection
&D1	No effect		Connection establishment is aborted	ISDN terminal adapter shifts to command state
&D2	Existing condition terminated; stored digits are cleared		Connection establishment is aborted	ISDN terminal adapter shifts to command state; connection terminated
&D3	Existing condition terminated; stored digits are cleared and ISDN terminal adapter is reinitialized		Connection establishment is aborted and ISDN terminal adapter is reinitialized	and ISDN terminal adapter shifts to command state; ISDN terminal adapter is reinitialized

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
DS=n, D/n	Dial stored telephone number n
DS, D/	Dial stored telephone number 0
DN	Establish a modem connection
DI	Establish a ISDN connection
D*	Phone number component for controlling PBX systems
D#	1TR6 protocol: Dialing code for external calls (valid for some ISDN branch exchanges) DSS1 protocol: Sending complete (additional information required in some countries)
D;	Store digits preceding semicolon in NVRAM and dial them when an ATO command is executed without a data connection

HOOK CONTROL
Type:	Immediate
Format:	AT [cmds] Hn [cmds]
Description:	Selects whether the modem is on-hook or off-hook
Command	Function
H0	Modem commanded to go on-hook (hang-up)

LINE TYPE
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Description:	Selects line type
Command	Line Type
&L0	Switched line (PSTN/Dial-up)
&L1	Group 0 leased-line. Manual connection
&L2	Group 0 leased-line. Automatic connection

ON-LINE
Type:	Immediate
Format:	AT [cmds] On [cmds]
Description:	Controls on-line command (data transmission) state options.
Note: The O command must be placed at the end of the command string.
Command	Function
O0	On-line command mode enabled

REACTION TO BUSY LINE/CONNECT MESSAGE
Type:	Configuration
Format:	AT [cmds] Xn [cmds]
Description:	Enables selection of tone detection and associated result code format options
Command	Function
X0	Busy line reported with NO CARRIER
X1	Busy line reported with NO CARRIER
X2	Busy line reported with NO CARRIER
X3	Busy line reported with BUSY
X4	Busy line reported with BUSY

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested
Command	Function
I0	Reports model number in nnn format
I1	Reports ROM checksum
I2	Tests and reports ROM checksum
I3	Reports firmware version number and release date
I4	Reports current parameter settings
I5	Reports serial number
I6	Reports product name and hardware release
I7	Reports plug and play ID text

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 from ISDN terminal adapter enabled
Q1	Result code sending from ISDN terminal adapter disabled
Q2	Result code sending in answer mode disabled

RTS/CTS
Type:	Configuration
Format:	AT [cmds] &Rn [cmds]
Description:	Selects RTS/CTS options
Command	Function
í&R0	CTS follows RTS
&R1	CTS forced high, RTS is ignored.

STORE NUMBERS
Type:	Configuration
Format:	AT [cmds] &Zm=n
Description:	Writes selected ISDN numbers n into the non-volatile memory at location m (0-9)
Note: Telephone numbers can include up to 36 characters.

BIT RATE (POST CONNECTION)
Type:	Configuration
Format:	AT [cmds] \Jn [cmds]
Description:	Determines fixed or variable bit rate
Command	Function
í\J0	Computer line bit rate remains unchanged
\J1	DTE rate matches DCE rate

BIT RATE ADAPTION IN ANSWER MODE
Type:	Configuration
Format:	AT [cmds] %Ln [cmds]
Description:	Determines whether V.110 mode line bit rate is adapted to the bit rate of the remote system
Command	Function
%L0	Bit rate is adapted to remote system
í%L1	Bit rate is adapted to remote system
%L2	Bit rate is not adapted; connection is terminated
%L3	Bit rate is adapted to remote system

COMPRESSION
Type:	Configuration
Format:	AT [cmds] %Cn [cmds]
Description:	Selects data compression
Command	Function
%C0	Data compression disabled
%C1	V.42bis enabled
%C2	V.42bis enabled
í%C3	V.42bis enabled

CONNECT MODE
Type:	Configuration
Format:	AT [cmds] \Nn [cmds]
Description:	Controls the type of connection the modem will operate in
Command	Function
\N0	V.110 normal mode enabled
\N1	V.110 direct mode enabled
\N2	X.75 error correction mode enabled. Connection is aborted if modem does not support X.75
\N3	X.75 error correction mode enabled. Modem fallback to V.110 if modem does not support X.75
\N4	V.120 error correction mode enabled. Connection is aborted if modem does not support V.120
\N5	V.120 error correction mode enabled. Modem fallback to V.110 if modem does not support V.120
\N6	V.120 or X.75 error correction mode enabled for incoming calls. Outgoing calls are performed with X.75 (Europe) or V.120 (America)
\N7	V.120 or X.75 error correction mode enabled for incoming calls. Outgoing calls are performed with X.75 (Europe) or V.120 (America). Modem fallback to V.110 if connection cannot be established
\N8	German T-Online service error correction mode enabled. VT-100 pages may be displayed with a VT-100 compatible terminal
\N9	German T-Online service error correction mode enabled. Btx and KIT graphics pages may be displayed with Btx or KIT decoder
\N10	HDLC transparent mode enabled (PPP conversion required)

DSR/CTS CONTROL
Type:	Configuration
Format:	AT [cmds] \Dn [cmds]
Description:	Controls DSR and CTS lines
Command	Function
\D0	DSR and CTS forced high
\D1	DSR indicates B-channel switched through, CTS forced high
\D2	DSR forced high, CTS follows DCD
\D3	DSR indicates B-channel switched through, CTS follows DCD

ERROR CORRECTION CONNECT MESSAGES
Type:	Configuration
Format:	AT [cmds] \Vn [cmds]
Description:	Determines the comprehensiveness of error correction CONNECT messages
Command	Function
\V0	Extended result codes disabled
\V1	Identifies error corrected connections
\V2	Identifies error corrected connections and types
í\V8	Comprehensive CONNECT messages

FIRMWARE UPLOAD
Type:	Immediate
Format:	AT [cmds] UPX [cmds]
Description:	Readies device to receive firmware upload in flash ROM at transfer rate last used, up to 57.6Kbps

FIRMWARE VERSION
Type:	Immediate
Format:	AT [cmds] %V [cmds]
Description:	Displays firmware version of the ISDN TA on the monitor

FLOW CONTROL TYPE
Type:	Configuration
Format:	AT [cmds] \Qn [cmds]
Description:	Sets type of flow control used by TA
Command	Function
\Q0	Flow control disabled
\Q1	Bi-directional XON/XOFF flow control enabled
\Q2	CTS flow control by DCE enabled
í\Q3	Bi-directional RTS/CTS flow control enabled
\Q4	Unidirectional XON/XOFF flow control by DCE enabled
\Q5	CTS flow control by DCE enabled. CTS low until connection established
\Q6	Bi-directional RTS/CTS flow control enabled. CTS low until connection established

ISDN BIT RATE (V.110)
Type:	Configuration
Format:	AT [cmds] %Bn [cmds]
Description:	Selects ISDN bit rate in V.110 mode
Command	Function
%B1200	1200bps
%B2400	2400bps
%B4800	4800bps
%B9600	9600bps
%B19200	19.2Kbps
í%B38400	38.4Kbps
%B48000	48.0Kbps
%B56000	56.0Kbps
%B64000	64.0Kbps

ISDN BIT RATE (V.120, X.75, HDLC)
Type:	Configuration
Format:	AT [cmds] %Sn [cmds]
Description:	Selects ISDN bit rate in V.110 mode
Command	Function
í%S0	64Kbps
%S1	56Kbps

LINE BIT RATE
Type:	Configuration
Format:	AT [cmds] %Gn [cmds]
Description:	Selects line bit rate control
Command	Function
í%G0	Line bit rate determined by serial port rate
%G1	Line bit rate set by %B

PPP ASYNC/SYNC CONVERSION
Type:	Configuration
Format:	AT [cmds] %Pn [cmds]
Description:	Enables/disables asynchronous/synchronous conversion for point-to-point protocol
Command	Function
í%P0	Asynchronous/synchronous conversion for point-to-point protocol disabled
%P1	Asynchronous/synchronous conversion for point-to-point protocol enabled

REGISTER CONTENT DISPLAY
Type:	Configuration
Format:	AT [cmds] %Sn [cmds]
Description:	Selects number of registers displayed per line
Command	Function
í%R0	Display two registers per line
%R1	Display one register per line

STORE NUMBERS
Type:	Configuration
Format:	AT [cmds] \Pmn [cmds]
Range:	m = 0-9
Description:	Up to ten ISDN numbers can be stored in NVRAM. Numbers n may have up to 36 characters

STORED NUMBERS
Type:	Immediate
Format:	AT [cmds] \F [cmds]
Description:	Displays ISDN numbers stored with the /P or &Z commands

AUTOMATIC DTR DIALING
Type:	Configuration
Format:	AT [cmds] $Dn [cmds]
Description:	Enables/disables automatic DTR dialing
Command	Function
$D0	DTR dialing disabled
$D1	DTR dialing enabled

DUMB MODE
Type:	Configuration
Format:	AT [cmds] -Hn [cmds]
Description:	Suppresses message echoing
Command	Function
í-H0	Normal operation
-H1	Dumb mode

EXTENDED CONFIGURATION PROFILE
Type:	Configuration
Format:	AT [cmds] *Wn [cmds]
Description:	Saves extended configuration profile
Command	Function
*W0	Saves extended configuration profile 0 to NVRAM and values in registers, S2, S3, S4, S5 & S12
*W1	Saves extended configuration profile 1 to NVRAM and values in registers, S2, S3, S4, S5 & S12

INVALID ESCAPE MESSAGES
Type:	Configuration
Format:	AT [cmds] *Qn [cmds]
Description:	Enables/disables CONNECT message after invalid escape
Command	Function
í*Q0	CONNECT message after invalid escape enabled
*Q1	CONNECT message after invalid escape disabled

SET/DISPLAY ACCEPTED MSN
Type:	Configuration
Format:	AT [cmds] +IMSN(n, ?)=(s) [cmds]
Range:	n=0,1
Description:	Limits acceptance to incoming calls with target MSN
Command		Function
+IMSNn=s		Store MSN
+IMSNn=		Clear MSN
+IMSN?		Display stored MSN

SET/DISPLAY D CHANNEL PROTOCOL (EUROPE)
Type:	Configuration
Format:	AT [cmds] +IDP=(xxxx) [cmds]
Description:	Selects D channel protocol
Command		Function
í+IDP=DSS1		DSS1 protocol enabled
+IDP=1TR6		1TR6 protocol enabled

SET/DISPLAY D CHANNEL PROTOCOL (USA)
Type:	Configuration
Format:	AT [cmds] +IDP(?)=(xxxx, ?) [cmds]
Description:	Selects D channel protocol
Command		Function
í+IDP=NI-1		NI-1 protocol enabled
+IDP=AT&T		AT&T 5ESS protocol enabled
+IDP=FV2N		Group 2 leased line protocol enabled (network side)
+IDP=FV2U		Group 2 leased line protocol enabled (user side)
+IDP?		Display selected protocol
+IDP=?		Display implemented protocols

SET/DISPLAY EAZ DIGIT
Type:	Configuration
Format:	AT [cmds] +IEAZ(?)=(n) [cmds]
Range	0-19, 255
Description:	Sets the EAZ terminal selection digit. Characters 0-9 will select digits 0-9, 10-19 will also select digits 0-9. 255 selects any digit for incoming calls, 0 for outgoing calls
Note:	Command is valid for German 1TR6 protocol only
Command		Function
+IEAZ=n		Store EAZ
+IEAZ?		Display EAZ

SET/DISPLAY DIRECTORY NUMBER
Type:	Configuration
Format:	AT [cmds] +IDN(n, ?)=(s) [cmds]
Range:	n=1,2 (B-channels), s=0-9
Description:	Sets and displays directory numbers. Directory number s can be up to 12 characters long
Command		Function
+IDNn=s		Set directory number
+IDNn=		Clear directory number
+IDNn?		Display directory number

SET/DISPLAY MSN
Type:	Configuration
Format:	AT [cmds] +ICLI(n, ?, /)=(s) [cmds]
Range:	s=0 - 9
Description:	Determines which multiple subscriber number is displayed to the remote side in outgoing calls as the originator address
Command		Function
+ICLI=s		Store originator MSN
+ICLIn=		Clear originator MSN
+ICLI=/		Clear originator MSN; suppress display to remote side
+ICLI?		Display stored originator MSN

SET/DISPLAY SPID
Type:	Configuration
Format:	AT [cmds] +ISPID(n, ?)=(s) [cmds]
Range:	n=1,2 (B-channels)
Description:	Sets and displays service profile ID
Command		Function
+ISPIDn=s		Set service profile ID
+ISPIDn=		Clear service profile ID
+ISPIDn?		Display service profile ID

STORE NUMBERS FOR CLOSED USER GROUPS
Type:	Configuration
Format:	AT [cmds] +ICLD(n, ?)=(s) [cmds]
Range:	n=1 - 3
Description:	Restricts call acceptance to remote systems
Command		Function
+ICLDn=s		Store a call number
+ICLDn=		Clear a call number
+ICDL?		Clear stored numbers

VERBOSE CONNECT MESSAGES
Type:	Configuration
Format:	AT [cmds] -Mn [cmds]
Description:	Controls text of verbose CONNECT messages
Command	Function
í-M0	Verbose CONNECT messages dependant on AT\V
-M1	Verbose CONNECT messages independent of AT\V

BIT-MAPPED REGISTER S14
Format:		AT [cmds] S14=n [cmds]
Range:		0-174
Unit:		Bit-mapped
Description:		Controls echo, result codes and display, dial mode, and answer/originate mode.
Bit	Dec. Value	Function
0	0	Not used
1	0 2	Command echo disabled Command echo enabled
2	0 4	Result codes enabled Result codes disabled
3	0 8	Display result codes in numeric format Display result codes in verbose format
4	0 16	Smart mode Dumb mode
5	0 32	Bit rate detection enabled Bit rate detection disabled
6	0 64	Polling allowed during connection establishment Polling not allowed during connection establishment
7	0 128	Answer mode enabled Originate mode enabled

BIT-MAPPED REGISTER S21
Format		AT [cmds] S21=n [cmds]
Range:		0-253
Unit:		Bit-mapped
Description:		Selects jack type, CTS/DCD/DSR signals, low DTR action, and the long space disconnect function.
Bit	Dec. Value	Function
0,1	0	Not used
2	í 0 4	CTS follows RTS CTS forced high
4, 3	0 8 í 16 24	DTR signal ignored Modem goes to command mode on low DTR Modem disconnects on low DTR; Auto-Answer is disabled. Modem is initialized on low DTR
5	0 í 32	DCD forced high DCD normal
6,7	0	Not used

BIT-MAPPED REGISTER S22
Format		AT [cmds] S22=n [cmds]
Range:		0-255
Unit:		Bit-mapped
Description:		Limits results codes
Bit	Dec. Value	Function
0-3	0	Not used
6 - 4	0 64 80 96 í 112	Busy line reported with NO CARRIER Busy line reported with NO CARRIER Busy line reported with NO CARRIER Busy line reported with BUSY Busy line reported with BUSY
7	0	Not used

BIT-MAPPED REGISTER S27
Format		AT [cmds] S27=n [cmds]
Range:		0-111
Unit:		Bit-mapped
Description:		Selects synchronous/asynchronous mode, and line type
Bit	Dec. Value	Function
1, 0	í 0 1 2	Asynchronous mode Synchronous mode Synchronous operation, DTR dialing
2, 3	í 0 4 8	Switched line Group 0 leased line, manual connection established Group 0 leased line, automatic connection established
4-7	0	Not used

BIT-MAPPED REGISTER S28
Format		AT [cmds] S28=n [cmds]
Range:		0-31
Unit:		Bit-mapped
Description:		Controls V.110 rate adaption
Bit	Dec. Value	Function
0, 1	0	Not used
2, 3	0 í 4 8 12	V.110 bit rate adaptation enabled V.110 bit rate adaptation enabled V.110 bit rate adaptation disabled V.110 bit rate adaptation enabled
4-7	0	Not used

BIT-MAPPED REGISTER S31
Format		AT [cmds] S31=n [cmds]
Unit:		Bit-mapped
Description:		Enables/disables DTR dialing
Bit	Dec. Value	Function
0-4	0	Not used
5	í 0 32	DTR dialing enabled DTR dialing disabled
6, 7	0	Not used

BIT-MAPPED REGISTER S36
Type:		Register
Format		AT [cmds] S36=n [cmds]
Description:		Selects the action of the modem if it fails to connect with the error-correction protocol set in &Q.
Bit	Dec. Value	Function
0-3	0	Normal mode (V.110)
	1	Direct mode (V.110)
	2	X.75 mode
	3	X.75; fallback to V.110 mode
	4	V.120 mode
	5	V.120; fallback to V.110 mode
	6	X.75 or V.120 mode
	í 7	X.75 or V.120; fallback to V.110 mode
	8	X.75 VT-100 mode (German T-Online service)
	9	X.75 CEPT & KIT mode (German T-Online service)
4-6	0	Reserved
7	í 0 128	Channel bundling disabled Channel bundling enabled

BIT-MAPPED REGISTER S37
Type:		Register
Format		AT [cmds] S37=n [cmds]
Description:		Sets the maximum allowable ISDN line bit rate in V.110 operation
Bit	Dec. Value	Function
0-4	5	ISDN line bit rate at 1200bps
	6	ISDN line bit rate at 2400bps
	7	ISDN line bit rate at 4800bps
	9	ISDN line bit rate at 9600bps
	13	ISDN line bit rate at 19.2Kbps
	í21	ISDN line bit rate at 38.4Kbps
	22	ISDN line bit rate at 48.0Kbps
	23	ISDN line bit rate at 56.0Kbps
	24	ISDN line bit rate at 64.0Kbps
5	0	Reserved
6	í0 64	ISDN bit rate depends on serial port rate ISDN bit rate determined by %B
7	í0 128	Fixed serial port rate serial port rate adapted to ISDN line rate

BIT-MAPPED REGISTER S46
Type:			Register
Format:		AT [cmds] S46=n [cmds]
Description:		Selects active error correction and compression protocols
Bit	Dec. Value			Function
0-3	0			Data compression disabled
	1			V.42bis data compression enabled
	2			V.42bis data compression enabled
	í 3			V.42bis data compression enabled
4-7	0			Reserved

BIT-MAPPED REGISTER S51
Type:		Register
Format		AT [cmds] S51=n [cmds]
Description:		Sets flow control options
Bit	Dec. Value	Function
0-3	0	No handshake
	1	Bi-directional XON/XOFF flow control enabled
	2	Unidirectional RTS/CTS flow control enabled
	3	Bi-directional RTS/CTS flow control enabled
	í4	Unidirectional XON/XOFF flow control by DCE enabled
	5	CTS flow control by DCE enabled. CTS low until connection established
	6	Bi-directional RTS/CTS flow control enabled. CTS low until connection established
4	í0 16	XON/XOFF remote passthrough disabled XON/XOFF remote passthrough enabled
5-7	0	Reserved

BIT-MAPPED REGISTER S52
Type:		Register
Format		AT [cmds] S52=n [cmds]
Description:		Sets DSR, CTS, DCD options
Bit	Dec. Value	Function
0, 1	í0	DSR forced high, CTS forced high
	1	DSR indicates B-channel switched through, CTS forced high
	2	DSR forced high, CTS follows DCD
	3	DSR indicates B-channel switched through, CTS follows DCD
2, 3	í0 8	DCD either forced high, or indicates existing connection ( depending on S21) DCD off for .5 seconds during connection
4,5	í0 32	DSR forced high, CTS forced high DSR indicates B-channel switched through, CTS forced high
6,7	0 64 128	CTS determined by \D CTS follows RTS CTS follows RTS after .5…6 seconds

BIT-MAPPED REGISTER S87
Type:		Register
Format		AT [cmds] S87=n [cmds]
Description:		Read only register. Reports current bit rate
Bit	Dec. Value	Function
0-4	0	No connection established
	4	ISDN line bit rate at 1200bps
	6	ISDN line bit rate at 2400bps
	7	ISDN line bit rate at 4800bps
	9	ISDN line bit rate at 9600bps
	13	ISDN line bit rate at 19.2Kbps
	í21	ISDN line bit rate at 38.4Kbps
	22	ISDN line bit rate at 48.0Kbps
	23	ISDN line bit rate at 56.0Kbps
	24	ISDN line bit rate at 64.0Kbps
5	í0 32	One-channel connection 2nd ISDN connection with 128/112Kbps (2nd B-channel with 56/64Kbps)
6, 7	0	Reserved

BIT-MAPPED REGISTER S93
Type:		Register
Format		AT [cmds] S93=n [cmds]
Description:		Determines serial port bit rate
Bit	Dec. Value	Function
0-4	0	No connection established
	5	Serial port bit rate at 1200bps
	6	Serial port bit rate at 2400bps
	7	Serial port bit rate at 4800bps
	9	Serial port bit rate at 9600bps
	13	Serial port bit rate at 19.2Kbps
	í21	Serial port bit rate at 38.4Kbps
	22	Serial port bit rate at 48.0Kbps
	23	Serial port bit rate at 56.0Kbps
	24	Serial port bit rate at 64.0Kbps
5	0	Reserved
6, 7	0 64 128 192	Data format 8N1 Data format 7E1 Data format 7O1 Data format 7N2

BIT-MAPPED REGISTER S95
Type:		Register
Format		AT [cmds] S95=n [cmds]
Description:		Determines result codes
Bit	Dec. Value	Function
0-3	0	No modified CONNECT messages
	1	Indicates error-corrected connections
	2	Indicates error-corrected connections and error correction method
	í8	Extensive CONNECT result codes
4	í0 16	CONNECT messages with bit rate CONNECT messages without bit rate
5	í0 32	CONNECT messages after invalid escape sequence No CONNECT messages after invalid escape sequence
6, 7	í0 128	Result codes enabled or disabled (depending on S14) Result codes disabled in answer mode

BIT-MAPPED REGISTER S96
Type:		Register
Format		AT [cmds] S96=n [cmds]
Description:		Sets AT command interpreter
Bit	Dec. Value	Function
0,1	0	Reserved
2	í0	Message ‘Press any key to continue’ enabled
	4	Message ‘Press any key to continue’ disabled
3,4	í0 8 16 24	German user interface (European default) English user interface (US default) Reserved Reserved
5,6	0	Reserved
7	í0 128	Disable error message for access of invalid or protected S register (® OK) Enable error message for access of invalid or protected S register (® ERROR)

BIT-MAPPED REGISTER S151
Type:		Register
Format		AT [cmds] S151=n [cmds]
Description:		Controls ISDN D channel
Bit	Dec. Value	Function
0	í0 1	Send error result code to network if device is busy or not ready Do not send error result code to network if device is busy or not ready
1	í0	Incoming calls confirmed with ALERT
	1	No ALERT for incoming calls
2	í0 4	V.120: LLC (low layer capability) not signaled in D-channel V.110: BC (bearer capability) and LLC not signaled in D-channel V.120: LLC (low layer capability) signaled in D-channel V.110: BC (bearer capability) and LLC signaled in D-channel
3	0	Reserved
4	0 16	Incoming calls on B-channel 1 will be accepted Incoming calls on B-channel 1 will be ignored
5	0 32	Incoming calls on B-channel 2 will be accepted Incoming calls on B-channel 2 will be ignored
6,7	0	Reserved

BIT-MAPPED REGISTER S153
Type:		Register
Format		AT [cmds] S153=n [cmds]
Description:		Controls CONNECT/NO CARRIER message options
Bit	Dec. Value	Function
0	í0 1	Remote number is not displayed after CONNECT Remote number is displayed after CONNECT
1	í0 2	Remote number is not displayed after RING Remote number is displayed after RING
2	í0	MSN/EAZ dialed by the remote side is not displayed
	4	MSN/EAZ dialed by the remote side is displayed if bit 0 and/or 1=1
3-5	0	Reserved
6	í0 64	Result codes are not displayed Result codes are displayed
7	í0 128	Disconnect reason not displayed Disconnect reason reported after NO CARRIER according to S154/S155

BIT-MAPPED REGISTER S158
Type:		Register
Format		AT [cmds] S158=n [cmds]
Description:		Controls CONNECT/NO CARRIER message options
Bit	Dec. Value	Function
0	í00 01 02	No connection was established Current/last connection on B-channel 1 Current/last connection on B-channel 2

BIT-MAPPED REGISTER S159
Type:		Register
Format		AT [cmds] S159=n [cmds]
Description:		Shows current status of ISDN interface
Bit	Dec. Value	Function
0	í0 1	No power on S0 bus detected Normal or restricted power on S0 bus
1	0	Reserved
2	0 4	S0 bus not activated S0 bus activated
3	0 8	No TEI assigned TEI assigned
4-7	0	Reserved

BIT-MAPPED REGISTER S160
Type:	Register (read only)
Format	AT [cmds] S160=n [cmds]
Description:	Shows information about last call on ISDN interface
Value (Hex)	Function
00h	No incoming call
10h	Call is currently being reported
11h	Call accepted
12h	Call withdrawn or answered by another device on the S0 bus
20h	Call had wrong bearer capability or service indicator
21h	Call had wrong MSN or EAZ
30h	DTR was off, call was rejected
31h	ISDN adapter was already connected or establishing another connection
40h	Number check not OK
41h	Number check not OK, no number was given

BIT-MAPPED REGISTER S162
Type:		Register
Format		AT [cmds] S162=n [cmds]
Description:		Selects preferred B-channel
Bit	Dec. Value	Function
0,1	í0 1 2	Any B-channel is used: Leased line operation: B1 channel is used B1 channel has priority B2 channel has priority

BIT-MAPPED REGISTER S171
Type:		Register
Format		AT [cmds] S171=n [cmds]
Description:		Specifies details of X.75 protocol
Bit	Dec. Value	Function
0-2	í0 1 2 3 4	Data block size 128 bytes Data block size 256 bytes Data block size 512 bytes Data block size 1024 bytes Data block size 2048 bytes
3	0	Reserved
4	0 16	Async/sync conversion for PPP disabled Async/sync conversion for PPP enabled
5	0 32	64Kbps (Europe default) 56Kbps (US default)
6,7	í0 64 128 192	T.70NL header disabled T.70NL header disabled T.70NL header enabled. Block size reduced by 2 bytes T.70NL header enabled. Block size extended by 2 bytes

BIT-MAPPED REGISTER S172
Type:		Register
Format		AT [cmds] S172=n [cmds]
Description:		Specifies details of V.120 protocol
Bit	Dec. Value	Function
0	í0 1	Data block size 127 bytes Data block size 259 bytes
1-6	0	Reserved
7	í0 128	64Kbps (Europe default) 56Kbps (US default)

BIT-MAPPED REGISTER S173
Type:		Register
Format		AT [cmds] S173=n [cmds]
Description:		Specifies details of V.110 protocol
Bit	Dec. Value	Function
0	0	Reserved
1-2	0 2 4 6	No parity, asynchronous Odd parity, asynchronous Even parity, asynchronous "1" parity, asynchronous
3	í0 8	RTS, DCD, DSR normal operations V.110 half duplex operation, asynchronous
4	í0 16	Bit rate tolerance 12.5%, asynchronous Bit rate tolerance 25%, asynchronous
5	í0 32	1 stop bit, asynchronous 2 stop bit 2, asynchronous
6-7	í0 64 128 192	8 bits/character, asynchronous (no parity bit) 7 bits/character, asynchronous (no parity bit) 6 bits/character, asynchronous (no parity bit) 5 bits/character, asynchronous (no parity bit)

BIT-MAPPED REGISTER S175
Type:		Register
Format		AT [cmds] S175=n [cmds]
Description:		Controls additional settings for channel bundling
Bit	Dec. Value	Function
0,1	0	Reserved
2	í0 4	Static channel bundling (second B-channel always active) Dynamic channel bundling (second B-channel active when needed)
3	í0 8	Connection hold time starts when throughput falls below limit Connection hold time starts with each charge unit
4	í0 16	Secondary connection with the same number as primary connection Secondary connection with the same number as primary connection without SPC flag
5	í0 32	Supplied number not required for identification of second B-channel Supplied number required for identification of second B-channel
6	í0 64	CONNECT reported after primary connection establishment CONNECT reported after secondary connection establishment
7	í0 128	Normal DSR function DSR off when secondary connection established

CALL INDICATION DELAY
Type:	Register
Format	AT [cmds] S152=n [cmds]
Range:	0-50
Unit:	10ms
Description:	Sets the delay for indication of incoming calls

CHANNEL BUNDLING HOLD TIME
Type	Register
Format	AT [cmds] S178=n [cmds]
Range	0-255 x 10
Unit	10sec
Description	Defines amount of time the second B channel is held after the throughput falls below the limit set in register S176. Register used only if bit 2 of Register S175 is set.

CHANNEL BUNDLING THROUGHPUT AVERAGING
Type	Register
Format	AT [cmds] S177=n [cmds]
Range	0-32
Unit	1sec
Description	Defines time over which the average data throughput is calculated in order to smooth fluctuations throughout. Default=0

CHANNEL BUNDLING THROUGHPUT LIMIT
Type	Register
Format	AT [cmds] S176=n [cmds]
Range	0-255 x 100
Unit	100 bytes/sec
Description	Defines data throughput limit that must be exceeded for second B-channel to be established. Register used only if bit 2 of Register S175 is set.

CHARGE UNITS - CURRENT (EUROPE)
Type	Register
Format	AT [cmds] S191=n [cmds]
Range	10
Unit	ASCII
Description	Contains number of charge units or total charge for current or last connection

CHARGE UNITS - TOTAL (EUROPE)
Type	Register
Format	AT [cmds] S192=n [cmds]
Range	10
Unit	ASCII
Description	Contains total number of charge units or total charge for all previous connections. 0 resets register

CHARGED UNITS
Type	Register
Format	AT [cmds] S167=n [cmds]
Range	0-255
Unit	10
Description	Sets the maximum number of charged units which my be used within a certain number of days set in register S168