Card Type	ISDN TA
Chipset	Siemens
ISDN Protocol	V.110, V.120, X.75, PPP
Switch Type	5ESS, DMS100, 1TR6, EWSD, DSS1, NI-1
Data Bus	Serial
Error Correction/Compression	V.42bis

CONNECTIONS
Function	Label	Function	Label
Analog line 1 in	CN1	DC power in	CN5
Analog line 2 in	CN2	Power switch	SW1
ISDN line out	CN3	Auto-dial switch	SW2
Serial port	CN4
Note: Pressing the auto-dial switch while connected will disconnect the call.

DIAGNOSTIC LED(S) (POWER-UP)
LED	Color	Status	Condition
LNK	Unidentified	On	TA is testing memory
LNK	Unidentified	Blinking	Memory test failed
B1	Unidentified	On	TA is testing ISDN controller interface
B1	Unidentified	Blinking	ISDN controller interface test failed
B2	Unidentified	On	TA is testing ISDN controller functions
B2	Unidentified	Blinking	ISDN controller function test failed
AA	Unidentified	On	TA is testing HDLC functions
AA	Unidentified	Blinking	HDLC function test failed
LNK	Unidentified	On	All tests passed
Note: On power-up, the TA should go through the tests in the order indicated above. A blinking LED or any pattern other than the ones shown above indicate an error.

DIAGNOSTIC LED(S) (NORMAL OPERATION)
LED	Color	Status	Condition
PWR	Unidentified	On	Power is on
PWR	Unidentified	Off	Power is off
LNK	Unidentified	On	Physical ISDN layer active
LNK	Unidentified	Off	Physical ISDN layer inactive
LNK	Unidentified	Blinking	D-channel link layer in multi-frame mode
B1	Unidentified	On	B1 channel connected
B1	Unidentified	Off	B1 channel not connected
B1	Unidentified	Random blink	B1 channel is retransmitting packets
B1	Unidentified	1 blink	B1 channel is protected by single DES encryption
B1	Unidentified	3 blinks	B1 channel is protected by triple DES encryption
B2	Unidentified	On	B2 channel connected
B2	Unidentified	Off	B2 channel not connected
B2	Unidentified	Random blink	B2 channel is retransmitting packets
B2	Unidentified	1 blink	B2 channel is protected by single DES encryption
B2	Unidentified	3 blinks	B2 channel is protected by triple DES encryption
AA	Unidentified	On	Auto-answer enabled
AA	Unidentified	Off	Auto-answer disabled
AA	Unidentified	Blinking	Phone is ringing
DTR	Unidentified	On	DTR signal is high
DTR	Unidentified	Off	DTR signal is low
TX	Unidentified	Blinking	Serial port is transmitting data to TA
TX	Unidentified	Off	Serial port is not transmitting data to TA
RX	Unidentified	Blinking	Serial port is receiving data from TA
RX	Unidentified	Off	Serial port is not receiving data from TA
1	Unidentified	On	Analog line 1 is off-hook
1	Unidentified	Off	Analog line 1 is on-hook
2	Unidentified	On	Analog line 2 is off-hook
2	Unidentified	Off	Analog line 2 is on-hook

SUPPORTED STANDARD COMMANDS

Basic AT Commands

+++, ‘comma’, A/

A, E, L, M, O, V

&C, &D, &F, &W, &Z

S-Registers

S0, S1, S2, S3, S4, S5, S7, S8

Note: See MHI help file for complete information.

ADDRESS IDENTIFICATION
Type:	Immediate
Format:	AT [cmds] &ZOy=YaNb<#>/Zcxxxx/ [cmds] AT [cmds] &ZOy=A/Zcxxxx/ [cmds]
Description:	Sets the modem’s call identification to identify itself to remote ISDN devices. A indicates that no number is specified.
Note:	One of either the YaNb<#> arguments or the A/Zcxxxx/ must be present.
Argument	Function
y=A	Set address for analog adapter 1.
y=B	Set address for analog adapter 2.
y=I	Set address for ISDN.
í a=0	Unknown number locality.
a=1	International number.
a=2	National number.
a=3	Network number.
a=4	Subscriber number.
a=6	Abbreviated number.
í b=0	Unknown number type.
b=1	ISDN type number.
b=3	X.121 data type number.
b=8	National standard number.
b=9	Private number.
í c=0	NSAP subaddress of IA5 characters, AFI=0x50.
c=2	User specified subaddress of IA5 characters.

ADDRESS IDENTIFICATION - INCOMING CALL
Type:	Immediate
Format:	AT [cmds] &ZIn=<#> [cmds]
Description:	Compares the number for an incoming call to the address stored for each value of n. If the numbers match, the call is routed to the appropriate mode and protocol.
Argument	Function
n=0	Set address for X.75 ISDN.
n=1	Set address for V.110 ISDN.
n=2	Set address for V.120 ISDN.
n=3	Set address for PPP asynchronous to HDLC conversion.
n=4	Set address for protocol auto-detection.
n=6	Set address for analog adapter 1.
n=7	Set address for analog adapter 2.

AUTO-ANSWER PRIORITY
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Description:	Selects which analog adapter will answer incoming analog calls first.
Command	Function
í &L0	Analog adapter 1 answers first.
&L1	Analog adapter 2 answers first.

BANDWIDTH ON DEMAND - HIGH TRAFFIC THRESHOLD
Type:	Register
Format:	AT [cmds] JAn [cmds]
Default:	48
Range:	0 - 255
Unit:	1 Kbps
Description:	Sets the level that the bandwidth in use must be over for the time set by the KAM and KAS commands for the TA to attempt to add another B channel connection.

BANDWIDTH ON DEMAND - HIGH TRAFFIC TIME, MINUTES
Type:	Register
Format:	AT [cmds] KAMn [cmds]
Default:	0
Range:	0 - 63
Unit:	1 minute
Description:	Sets the amount of time, in minutes, that the bandwidth in use set by the JA command must be exceeded for the TA to attempt to add another B channel connection.

BANDWIDTH ON DEMAND - HIGH TRAFFIC TIME, SECONDS
Type:	Register
Format:	AT [cmds] KASn [cmds]
Default:	0
Range:	0 - 63
Unit:	1 second
Description:	Sets the amount of time, in seconds, that the bandwidth in use set by the JA command must be exceeded for the TA to attempt to add another B channel connection.

BANDWIDTH ON DEMAND - LOW TRAFFIC THRESHOLD
Type:	Register
Format:	AT [cmds] JSn [cmds]
Default:	32
Range:	0 - 255
Unit:	1 Kbps
Description:	Sets the level that the bandwidth in use must be under for the time set by the KSM and KSS commands for the TA to drop a B channel connection.

BANDWIDTH ON DEMAND - LOW TRAFFIC TIME, MINUTES
Type:	Register
Format:	AT [cmds] KSMn [cmds]
Default:	0
Range:	0 - 63
Unit:	1 minute
Description:	Sets the amount of time, in minutes, that the bandwidth in use set by the JS command must be under for the TA to drop a B channel connection.

BANDWIDTH ON DEMAND - LOW TRAFFIC TIME, SECONDS
Type:	Register
Format:	AT [cmds] KSSn [cmds]
Default:	0
Range:	0 - 63
Unit:	1 second
Description:	Sets the amount of time, in seconds, that the bandwidth in use set by the JS command must be under for the TA to drop a B channel connection.

BIT-MAPPED REGISTER S15
Format:		AT [cmds] S15=n [cmds]
Default:		130
Range:		0 - 158
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 S21
Format:		AT [cmds] S21=n [cmds]
Default:		154
Range:		0 - 220
Description:		Controls DTR, CTS, CD, and DSR signals, and speaker options.
Bit	Value	Function
0	0	Not used.
2, 1	00 í 01 10	Speaker disabled. Speaker enabled until carrier signal detected Speaker enabled.
3	í 0 1	DSR forced high. DSR normal.
4	0 í 1	CD forced high. CD normal.
5	0	Not used.
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 - 127
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	Insertion during phone call disabled. Insertion during phone call enabled.
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.

BIT-MAPPED REGISTER S35
Format:		AT [cmds] S35=n [cmds]
Default:		0
Range:		0 - 144
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
3 - 0	0000	Not used.
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
6, 5	00	Not used.
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 S38
Format:		AT [cmds] S38=n [cmds]
Default:		0
Range:		0 - 9
Description:		Controls auto-dial and CD signal.
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.

BIT-MAPPED REGISTER S42
Format:		AT [cmds] S42=n [cmds]
Default:		0
Range:		0 - 104
Description:		Controls escape sequence, data/voice switch, and RING result codes.
Bit	Value	Function
2 - 0	000	Not used.
3	í 0 1	Escape sequence enabled in answer mode. Escape sequence disabled in answer mode.
4	0	Not used.
5	í 0 1	Data/Voice switch enabled. Data/Voice switch disabled.
6	í 0 1	Enable RING result. Disable RING result.

BIT-MAPPED REGISTER S44
Format:		AT [cmds] S44=n [cmds]
Default:		0
Range:		0 - 24
Description:		Controls cyclic dialing and DSR signal.
Bit	Value	Function
3	í 0 1	Modem will dial only stored number specified by an executed DS command. Modem will cycle through stored numbers on DS command until modem connects.
4	í 0 1	DSR normal. DSR follows DTR.

BIT-MAPPED REGISTER S80
Format:		AT [cmds] S80=n [cmds]
Default:		0
Range:		0 - 208
Description:		Controls originate/answer mode and low-layer compatibility information.
Bit	Value	Function
3 - 0	0000	Not used.
4	í 0 1	Analog adapter 2 does not send low-level compatibility information. Analog adapter 2 sends low-level compatibility information.
5	0	Not used.
6	í 0 1	ISDN does not send low-level compatibility information. ISDN sends low-level compatibility information.
7	í 0 1	Analog adapter 1 does not send low-level compatibility information. Analog adapter 1 sends low-level compatibility information.

BIT-MAPPED REGISTER S83
Format:		AT [cmds] S83=n [cmds]
Default:		Unidentified
Range:		0 - 53
Description:		Controls the Loopback 4 function, V.42bis compression, and the default dialing device.
Bit	Value	Function
0	0 1	Loopback 4 disabled. Loopback 4 enabled.
1	0	Not used.
2	0 1	V.42bis compression disabled. V.42bis compression enabled.
3	0	Not used.
5, 4	í 00 10 11	Originate calls with analog adapter 1 by default. Originate calls with ISDN by default. Originate calls with analog adapter 2 by default.

BIT-MAPPED REGISTER S118
Format:		AT [cmds] S118=n [cmds]
Default:		Unidentified
Range:		0 - 245
Description:		Controls dial-in mode, default line speed, low-speed service type, and analog call acceptance.
Bit	Value	Function
0	0 1	Dial-in calls may be answered. Dial-in calls may not be answered.
1	0	Not used.
2	0 1	Use 64Kbps speed for ISDN. Use 56Kbps speed for ISDN.
3	0	Not used.
4	í 0 1	Use 3.1KHz service for analog line 2. Use voice service for analog line 2.
5	í 0 1	Use 3.1KHz service for analog line 1. Use voice service for analog line 1.
6	í 0 1	All analog calls will be answered. Only analog calls with matching MSN will be answered.
7	í 0 1	Incoming analog calls will be answered. Incoming analog calls will be ignored.

BIT-MAPPED REGISTER S119
Format:		AT [cmds] S119=n [cmds]
Default:		Unidentified
Range:		0 - 54
Description:		Controls callback function, signalling DDI, call acceptance, V.110 minimum speed, and MSN function.
Bit	Value	Function
0	í 0 1	Callback function disabled. Callback function enabled.
1	í 0 1	Point-to-point signaling DDI function disabled. Point-to-point signaling DDI function enabled.
2	í 0 1	Multipoint signaling DDI function disabled. Multipoint signaling DDI function enabled.
3	í 0 1	All calls will be answered. Only calls with matching MSN will be answered.
4	í 0 1	V.110 speed set to 19.2Kbps if local serial port speed is 19.2Kbps or faster. V.110 speed set to 38.4Kbps if local serial port speed is 38.4Kbps or faster.
5	í 0 1	MSN functions normally. Treat MSN settings as subaddresses.

CALL CHARGE - B1
Type:	Register
Format:	AT [cmds] S120? S121? [cmds]
Default:	Read-only
Range:	0-65535
Unit:	N/A
Description:	These registers store the accumulated call charge for the first ISDN B channel. S120 stores the Most Significant Byte, and S121 stores the Least Significant Byte. To obtain the correct value, use S120 * 256 + S121.

CALL CHARGE - B2
Type:	Register
Format:	AT [cmds] S122? S123? [cmds]
Default:	Read-only
Range:	0-65535
Unit:	N/A
Description:	These registers store the accumulated call charge for the second ISDN B channel. S122 stores the Most Significant Byte, and S123 stores the Least Significant Byte. To obtain the correct value, use S122 * 256 + S123.

CALLER ID
Type:	Register
Format:	AT [cmds] S84=n [cmds]
Description:	Controls the Caller ID function of the TA.
Command	Function
í S84=0	Caller ID enabled.
S84=16	Caller ID disabled.

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

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.

COMPRESSION AND ERROR CORRECTION MODE
Type:	Configuration
Format:	AT [cmds] &Knn [cmds]
Description:	Selects the type of data compression used over ISDN connections.
Command	Function
&K00	Compression disabled for ISDN calls.
&K44	V.42bis enabled for ISDN 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.
&V6	Displays analog adapter 1 settings.
&V7	Displays analog adapter 2 settings.

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 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] CG [cmds]
Description:	Performs modem diagnostics.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> AT [cmds] DYaNb<#>/Zcxxxx/ AT [cmds] DA/Zcxxxx/
Description:	Dials telephone number according to any modifiers included in the string.
Modifier	Function
DA	Dial with analog adapter 1.
DB	Dial with analog adapter 2.
DI	Dial with ISDN.
DL	Re-dial last number.
DSm+n	Number in memory location m dialed. If n is also specified, TA will make a bundled call.
DW	Dialing resumed following dial tone detection.
D,	Dialing paused for amount of time specified in S8 register.
N0	Unknown number type.
N1	ISDN type number.
N3	X.121 data type number.
N8	National standard number.
N9	Private number.
Y0	Unknown number locality.
Y1	International number.
Y2	National number.
Y3	Network number.
Y4	Subscriber number.
Y6	Abbreviated number.
Z0	NSAP subaddress of IA5 characters, AFI=0x50.
Z2	User specified subaddress of IA5 characters.

DIALING MODE DEFAULT
Type:	Configuration
Format:	AT [cmds] &On [cmds]
Description:	Selects which device the TA will originate calls with by default.
Command	Function
&O0	Originate calls with analog adapter 2.
&O2	Originate calls with ISDN.
&O3	Originate calls with analog adapter 1.

DISPLAY CALL CHARGE
Type:	Immediate
Format:	AT [cmds] CH? [cmds]
Description:	Displays the number of charge units for the last call.

DYNAMIC BANDWIDTH ALLOCATION
Type:	Configuration
Format:	AT [cmds] CEn [cmds]
Description:	Selects whether dynamic bandwidth allocation will be used to allow simultaneous data and voice calls.
Command	Function
CE0	Dynamic bandwidth allocation disabled.
í CE1	Dynamic bandwidth allocation enabled.

ENDPOINT DISCRIMINATOR ADDRESS
Type:	Configuration
Format:	AT [cmds] EPD=<a,b,c,d...s,t> [cmds]
Example:	ATEPD=<284,254,124,62,5>
Range:	0 - 255
Description:	Sets the endpoint discriminator address for multipoint PPP systems. Up to twenty numbers may be specified.

FIRMWARE DOWNLOAD
Type:	Immediate
Format:	AT [cmds] UPX
Description:	Begins an XMODEM download to the modem firmware.

FLOW CONTROL
Type:	Configuration
Format:	AT [cmds] &Hn [cmds]
Description:	Selects the type of flow control to use.
Command	Function
&H0	Flow control disabled.
í &H3	Hardware flow control enabled.
&H4	Software flow control enabled.

FLOW CONTROL
Type:	Register
Format:	AT [cmds] S27=n [cmds]
Description:	Selects the type of flow control to use.
Command	Function
S27=0	Flow control disabled.
í S27=24	Hardware flow control enabled.
S27=32	Software flow control enabled.

FLOW CONTROL CHARACTER - XOFF
Type:	Register
Format:	AT [cmds] S32=n [cmds]
Default:	19
Range:	0-255
Unit:	1 ASCII character
Description:	Sets the character used to represent XOFF.

FLOW CONTROL CHARACTER - XON
Type:	Register
Format:	AT [cmds] S31=n [cmds]
Default:	17
Range:	0-255
Unit:	1 ASCII character
Description:	Sets the character used to represent XON.

HELP
Type:	Immediate
Format:	AT [cmds] $ [cmds]
Description:	Displays help on the basic (no prefix) AT commands.

HIGH LAYER COMPATIBILITY - ANALOG ADAPTER 1
Type:	Register
Format:	AT [cmds] S111=n [cmds]
Description:	Sets high layer compatibility information for analog adapter 1 in non-1TR6 modes.
Note:	This table should not be used in 1TR6 mode; see SERVICE INDICATOR DETAILS for settings.
Command	Function
í S111=0	High layer compatibility information not sent.
S111=1	HLC information set to telephone.
S111=4	HLC information set to fax.
S111=40	HLC information set to F.220 Teletex.
S111=49	HLC information set to F.200 Teletex.
S111=50	HLC information set to F.300/T110 video service.
S111=53	HLC information set to F.60 telex.
S111=56	HLC information set to X.400 message handling.
S111=65	HLC information set to X.200 OSI application.

HIGH LAYER COMPATIBILITY - ANALOG ADAPTER 2
Type:	Register
Format:	AT [cmds] S108=n [cmds]
Description:	Sets high layer compatibility information for analog adapter 2 in non-1TR6 modes.
Note:	This table should not be used in 1TR6 mode; see SERVICE INDICATOR DETAILS for settings.
Command	Function
í S108=0	High layer compatibility information not sent.
S108=1	HLC information set to telephone.
S108=4	HLC information set to fax.
S108=40	HLC information set to F.220 Teletex.
S108=49	HLC information set to F.200 Teletex.
S108=50	HLC information set to F.300/T110 video service.
S108=53	HLC information set to F.60 telex.
S108=56	HLC information set to X.400 message handling.
S108=65	HLC information set to X.200 OSI application.

HIGH LAYER COMPATIBILITY - ISDN INTERFACE
Type:	Register
Format:	AT [cmds] S110=n [cmds]
Description:	Sets high layer compatibility information for the ISDN interface in non-1TR6 modes.
Note:	This table should not be used in 1TR6 mode; see SERVICE INDICATOR DETAILS for settings.
Command	Function
í S110=0	High layer compatibility information not sent.
S110=1	HLC information set to telephone.
S110=4	HLC information set to fax.
S110=40	HLC information set to F.220 Teletex.
S110=49	HLC information set to F.200 Teletex.
S110=50	HLC information set to F.300/T110 video service.
S110=53	HLC information set to F.60 telex.
S110=56	HLC information set to X.400 message handling.
S110=65	HLC information set to X.200 OSI application.

HOOK CONTROL
Type:	Immediate
Format:	AT [cmds] Hn [cmds]
Description:	Hangs up ISDN and analog lines.
Command		Function
H0		Hangs up line currently in use.
H3		Hangs up analog line 1.
H4		Hangs up analog line 2.

HOOK FLASH TIME
Type:	Register
Format:	AT [cmds] S56=n [cmds]
Default:	50
Range:	0-255
Unit:	10ms
Description:	Selects the amount of time the analog adapter goes on-hook for a hook flash.

I-FIELD DATA LENGTH
Type:	Register
Format:	AT [cmds] S114=n [cmds] AT [cmds] S115=n [cmds]
Default:	Unidentified
Range:	0-65535
Unit:	N/A
Description:	These registers set the data length for the I-field. S114 stores the Most Significant Byte, and S115 stores the Least Significant Byte. To set the correct value for S114, use the formula S114 = INT(value/256). To set S115, use the formula S115 = value - S114 * 256.

ISDN BUNDLE CONNECTION
Type:	Configuration
Format:	AT [cmds] &Jn [cmds]
Description:	Selects when the modem will attempt to make a two-channel bundle connection.
Command	Function
í &J0	Bundle connections disabled.
&J1	Bundle connections enabled on answer only.
&J2	Bundle connections enabled on originate only.
&J3	Bundle connections enabled.

ISDN BUNDLE CONNECTION
Type:	Configuration
Format:	AT [cmds] S87=n [cmds]
Description:	Selects when the modem will attempt to make a two-channel bundle connection.
Command	Function
í S87=0	Bundle connections disabled.
S87=32	Bundle connections enabled on answer only.
S87=64	Bundle connections enabled on originate only.
S87=96	Bundle connections enabled.

ISDN PACKET SIZE
Type:	Configuration
Format:	AT [cmds] CLn [cmds]
Default:	252
Range:	0-2048
Unit:	1 byte
Description:	Sets the maximum packet size for transmitting data on the ISDN line.

ISDN SPEED - B-CHANNEL
Type:	Configuration
Format:	AT [cmds] &En [cmds]
Description:	Selects the base speed that will be used for ISDN B-channel communications.
Command	Function
í &E0	64Kbps base speed.
&E1	56Kbps base speed.

LOCAL SERIAL PORT SPEED
Type:	Register
Format:	AT [cmds] S18=n [cmds]
Description:	Sets serial port speed.
Value	Meaning
0	Serial port speed follows connect speed.
1	Sets 921.6Kbps speed.
2	Sets 460.8Kbps speed.
3	Sets 230.4Kbps speed.
8	Sets 115.2Kbps speed.
9	Sets 57.6Kbps speed.
10	Sets 38.4Kbps speed.
11	Sets 19.2Kbps speed.
12	Sets 9600bps speed.
13	Sets 4800bps speed.
14	Sets 2400bps speed.
15	Sets 1200bps speed.

LOCAL SERIAL PORT SPEED ON AUTO-ANSWER
Type:	Register
Format:	AT [cmds] S20=n [cmds]
Description:	Sets the speed of the local serial port when the modem auto-answers an incoming call.
Value	Meaning
0	Sets 921.6Kbps speed.
1	Sets 460.8Kbps speed.
2	Sets 230.4Kbps speed.
3	Sets 115.2Kbps speed.
8	Sets 57.6Kbps speed.
9	Sets 38.4Kbps speed.
10	Sets 19.2Kbps speed.
11	Sets 9600bps speed.
12	Sets 4800bps speed.
13	Sets 2400bps speed.
14	Sets 1200bps speed.

LOOPBACK 4
Type:	Configuration
Format:	AT [cmds] CPn [cmds]
Description:	Selects the Loopback 4 function.
Command	Function
í CP0	Loopback 4 disabled.
CP1	Loopback 4 enabled.

LOOPBACK TEST SIGNALS
Type:	Register
Format:	AT [cmds] S41=n [cmds]
Description:	Selects whether loopback test signals 140 and 141 on the RS-232 interface will be used.
Command	Function
S41=0	Loopback test signals disabled.
S41=8	Loopback test signals enabled.

METERING PULSE
Format:		AT [cmds] S89=n [cmds]
Default:		0
Range:		0 - 96
Description:		Selects whether the TA will generate metering pulses on either of the analog adapters.
Bit	Value	Function
3 - 0	0000	Not used.
5	í 0 1	Metering pulse disabled on analog adapter 2. Metering pulse enabled on analog adapter 2.
6	í 0 1	Metering pulse disabled on analog adapter 1. Metering pulse enabled on analog adapter 1.

PPP IDLE OUT PREVENTION
Type:	Register
Format:	AT [cmds] S124=n [cmds]
Default:	0
Range:	0-255
Unit:	1 second
Description:	Sends an empty packet to avoid disconnection on PPP connections.

PREFIX FOR INTERNATIONAL NUMBERS
Type:	Configuration
Format:	AT [cmds] CIxxxx [cmds]
Description:	Sets the prefix that the modem will prepend to international numbers when reporting them in result codes.

PREFIX FOR LONG-DISTANCE NUMBERS
Type:	Configuration
Format:	AT [cmds] CNxxxx [cmds]
Description:	Sets the prefix that the modem will prepend to long-distance (but not international) numbers when reporting them in result codes.

PROTOCOL/SPEED - ISDN B-CHANNEL
Type:	Configuration
Format:	AT [cmds] Bnn [cmds]
Description:	Selects the protocol and speed that will be used for ISDN B-channel communications.
Command	Function
B00	Use X.75 transparent.
B01	Use X.75 with T.70.
B04	Use X.75 with BTX.
B10	Use V.110 autospeed.
B13	Use V.110 at 2400bps.
B14	Use V.110 at 4800bps.
B15	Use V.110 at 9600bps.
B16	Use V.110 at 14.4Kbps.
B17	Use V.110 at 19.2Kbps.
B18	Use V.110 at 38.4Kbps.
B19	Use V.110 at 57.6Kbps.
B20	Use V.120.
B40	Use PPP asynchronous to HDLC conversion.

PROTOCOL/SPEED - ISDN B-CHANNEL
Type:	Register
Format:	AT [cmds] S82=n [cmds]
Description:	Selects the protocol and speed that will be used for ISDN B-channel communications.
Command	Function
S82=60	Use V.120 at 64Kbps.
S82=61	Use V.120 at 56Kbps.
S82=62	Use X.75 transparent at 64Kbps.
S82=63	Use X.75 transparent at 56Kbps.
S82=64	Use X.75 with T.70 at 64Kbps.
S82=65	Use X.75 with T.70 at 56Kbps.
S82=70	Use X.75 with BTX at 64Kbps.
S82=71	Use X.75 with BTX at 56Kbps.
S82=72	Use V.110 at 64Kbps.
S82=73	Use V.110 at 56Kbps.
S82=74	Use PPP asynchronous to HDLC conversion at 64Kbps.
S82=75	Use PPP asynchronous to HDLC conversion at 56Kbps.
S82=76	Use SLIP asynchronous to HDLC conversion at 64Kbps.
S82=77	Use SLIP asynchronous to HDLC conversion at 56Kbps.

PROTOCOL/SPEED - ISDN B-CHANNEL BUNDLING
Type:	Register
Format:	AT [cmds] S100=n [cmds]
Description:	Selects the protocol that will be used for ISDN B-channel bundling.
Command	Function
í S100=0	Use Multiple Link Protocol.
S100=1	Use cFossil Channel Bundling.

PROTOCOL/SPEED - ISDN D-CHANNEL
Type:	Configuration
Format:	AT [cmds] Pn [cmds]
Description:	Selects the protocol and speed that will be used for ISDN D-channel communications.
Command	Function
í P0	Use Northern Telecom.
P1	Use National ISDN for 1 SPID.
P2	Use National ISDN for 2 SPIDs.
P4	Use AT&T point-to-point.
P5	Use AT&T multipoint for 1 SPID.
P6	Use AT&T multipoint for 2 SPIDs.