Card Type	Modem (synchronous/asynchronous)/Fax/Voice/ISDN
Chipset	Siemens-Nixdorf
ISDN Transfer Rate	128Kbps/112Kbps/64Kbps/56Kbps
Maximum Modem Rate	28.8Kbps
Maximum Fax Rate	14.4Kbps
Data Bus	Serial/Parallel
Fax Class	Class I & II
ISDN Protocol	ITU-T V.110, V.120, X.75 PPP, SLIP
Modem Modulation Protocol	Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.26bis, V.27bis, V.29, V.32, V.32bis, V.33, V.34 ZyXEL ZyX19200, ZyX16800, ZyCELL cellular
Fax Modulation Protocol	ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression	MNP5, V.42, V.42bis

CONNECTIONS
Function	Label		Function		Label
RS-232/422 port		CN1		Parallel port		CN5
Line out		CN2		Data/voice switch		BT1
Line in		CN3		Originate/answer switch		BT2
DC power		CN4

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

DIAGNOSTIC LED(S) - POWER-UP
LED	Status		Condition
HLD	On		Mainboard is performing self-test
HLD	Off		Mainboard passed self-test
LNK	1 blink		ROM checksum error on mainboard
LNK	2 blinks		DRAM on mainboard failed test
LNK	3 blinks		EEPROM checksum error on mainboard
LNK	4 blinks		DSP RAM failed test with code A
LNK	5 blinks		DSP RAM failed test with code B
LNK	6 blinks		VO analog circuit failed calibration test
LNK	7 blinks		VR analog circuit failed calibration test
LNK	8 blinks		FR analog circuit failed calibration test
LNK	9 blinks		DSP to controller communications test failed with code A
LNK	10 blinks		DSP to controller communications test failed with code B
LNK	On		All tests passed
B1 Status		B2 Status		AA Status	Condition
On		Off		Off	2086 chip address/bus test or interface test 1 in progress
Blinking		Off		Off	2086 chip address/bus or interface test 1 failed
Off		On		Off	2086 chip function test in progress
Off		Blinking		Off	2086 chip function test failed
Off		Off		On	2160 chip function test or 2086 chip interface test 3 in progress
Off		Off		Blinking	2160 chip function test or 2086 chip interface test 3 failed
Off		Off		Off	2086 chip interface test 2 in progress

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PWR	Red	On	Power is on
PWR	Red	Off	Power is off
MDM	Red	On	Modem is connected in data mode
MDM	Red	Off	Modem is not connected in data mode
FAX	Red	On	Modem is connected in fax mode
FAX	Red	Off	Modem is not connected in fax mode
VO	Red	On	Modem is connected in voice mode
VO	Red	Off	Modem is not connected in voice mode
SP	Red	On	Modem is communicating over serial port
SP	Red	Off	Modem is not communicating over serial port
PRP	Red	On	Modem is printing over parallel port
PRP	Red	Off	Modem is not printing over parallel port
PCP	Red	On	Modem is communicating over parallel port
PCP	Red	Off	Modem is not communicating over parallel port
B1	Red	On	ISDN B1 channel connection has been established
B1	Red	Off	ISDN B1 channel connection has not been established
B1	Red	Slow Blink	ISDN B1 channel connection has been established with DES encryption
B1	Red	Fast Blink	ISDN B1 channel connection has been established with triple DES
B2	Red	On	ISDN B2 channel connection has been established
B2	Red	Off	ISDN B2 channel connection has not been established
B2	Red	Slow Blink	ISDN B2 channel connection has been established with DES encryption

DIAGNOSTIC LED(S) (CON’T)
LED	Color	Status	Condition
B2	Red	Fast Blink	ISDN B2 channel connection has been established with triple DES
AA	Red	On	Auto-answer enabled
AA	Red	Off	Auto-answer disabled
AA	Red	Blinking	Phone is ringing
CD	Red	On	Carrier signal detected
CD	Red	Off	Carrier signal not detected
			Terminal Mode	Printer Mode
DTR/POL	Red	On	DTR signal is high	Printer is on-line
DTR/POL	Red	Off	DTR signal is low	Printer is off-line
DSR/PSL	Red	On	DSR signal is high	Printer is ready for input
DSR/PSL	Red	Off	DSR signal is low	Printer is not ready for input
RTS/PPE	Red	On	RTS signal is high	Printer is out of paper
RTS/PPE	Red	Off	RTS signal is low	Printer is not out of paper
CTS/PER	Red	On	CTS signal is high	Printer has encountered an error
CTS/PER	Red	Off	CTS signal is low	Printer has not encountered an error
TXD	Red	On	Modem is transmitting data
TXD	Red	Off	Modem is not transmitting data
RXD	Red	On	Modem is receiving data
RXD	Red	Off	Modem is not receiving data
HLD	Red	On	Call is on hold on handset
HLD	Red	Off	Call is not on hold on handset
LNK	Red	On	ISDN physical layer active
LNK	Red	Off	ISDN physical layer inactive
LNK	Red	Blinking	ISDN D channel in multiple-frame mode
OH	Red	On	Modem is off-hook
OH	Red	Off	Modem is on-hook
ORG	Red	On	Modem is in originate mode
ORG	Red	Off	Modem is in answer mode

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 SLIP asynchronous to HDLC conversion.
n=6	Set address for fax/modem.
n=7	Set address for A/B adapter.

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=M	Set address for fax/modem.
y=I	Set address for ISDN.
y=B	Set address for A/B adapter.
í a=0	Unknown number locality.
a=1	International number.
a=2	National number.
a=3	Network number.
a=4	Subscriber number.
í b=0	Unknown number type.
b=1	ISDN type number.
b=3	X.121 data type number.
b=4	Telex 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.

AUTO-ANSWER PRIORITY
Type:	Configuration
Format:	AT [cmds] &Ln [cmds]
Description:	Selects how the modem will answer calls it cannot determine the call’s type.
Command	Function
í &L0	A/B adapter answers first.
&L1	Data/fax answers first.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

BIT-MAPPED REGISTER S48
Format:		AT [cmds] S48=n [cmds]
Default:		0
Range:		0 - 63
Unit:		Bit-mapped
Description:		Controls caller ID format, call answering, calling tone, V.23 speed, DTR change action, and protocol negotiation.
Bit	Value	Function
0	í 0 1	Caller ID displayed normally. Caller ID displayed as raw data.
1	í 0 1	Modem will answer all calls. Modem will answer data calls only.
2	í 0 1	Calling tone disabled. Calling tone enabled.
3	í 0 1	V.23 speed set to 1200/75. V.23 speed set to 75/1200.
4	í 0 1	Modem does nothing on DTR change. Modem will dial default number on high DTR and disconnect and reset on low DTR.
5	í 0 1	Modem will negotiate all protocols. Modem will not negotiate protocols faster than 9600bps.

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

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

BIT-MAPPED REGISTER S80
Format:		AT [cmds] S80=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls originate/answer mode and low-layer compatibility information.
Bit	Value	Function
0	í 0 1	Fax/modem operates in originate mode. Fax/modem operates in answer mode.
1	í 0 1	ISDN D channel operates in originate mode. ISDN D channel operates in answer mode.
2	í 0 1	ISDN B channel operates in originate mode. ISDN B channel operates in answer mode.
3	í 0 1	A/B adapter operates in originate mode. A/B adapter operates in answer mode.
4	í 0 1	Fax/modem does not send low-level compatibility information. Fax/modem sends low-level compatibility information.
5	í 0 1	ISDN D channel does not send low-level compatibility information. ISDN D channel sends low-level compatibility information.
6	í 0 1	ISDN B channel does not send low-level compatibility information. ISDN B channel sends low-level compatibility information.
7	í 0 1	A/B adapter does not send low-level compatibility information. A/B adapter sends low-level compatibility information.

BIT-MAPPED REGISTER S83
Format:		AT [cmds] S83=n [cmds]
Default:		Unidentified
Range:		0 - 55
Unit:		Bit-mapped
Description:		Controls the Loopback 4 function, V.42bis compression on ISDN, and the default dialing device.
Bit	Value	Function
0	0 1	Loopback 4 disabled. Loopback 4 enabled.
1	0 1	V.42bis disabled on ISDN channel 2. V.42bis enabled on ISDN channel 2.
2	0 1	V.42bis disabled on ISDN channel 1. V.42bis enabled on ISDN channel 1.
3	0	Not used.
5-4	í 00 10 11	Originate calls in fax/data mode by default. Originate calls in ISDN mode by default. Originate calls in A/B adapter mode by default.

BIT-MAPPED REGISTER S84
Format:		AT [cmds] S84=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls protocol capture, register value format, caller ID information reporting, auto-answer priority,CAPI standard, and serial port mode.
Bit	Value	Function
0	í 0 1	Serial protocol capturing disabled. Serial protocol capturing enabled.
1	í 0 1	B-channel protocol capturing disabled. B-channel protocol capturing enabled.
2	í 0 1	D-channel protocol capturing disabled. D-channel protocol capturing enabled.
3	í 0 1	Display register values in decimal. Display register values in hexadecimal.
4	í 0 1	Caller ID information display enabled. Caller ID information display disabled.
5	í 0 1	A/B adapter answers an unknown call type first. Data/fax answers an unknown call type first.
6	í 0 1	Use CAPI 1.1a standard. Use CAPI 2.0 standard.
7	í 0 1	Serial port in single-stream mode. Serial port in multistream mode.

BIT-MAPPED REGISTER S87
Format:		AT [cmds] S87=n [cmds]
Default:		0
Range:		0 - 114
Unit:		Bit-mapped
Description:		Indicates module type and controls U-interface mode, DTMF dialing type, and bundle connection mode.
Note:		Bit 7 is read-only.
Bit	Value	Function
1-0	í 00 01 10	U-interface operates in normal TA mode. U-interface operates in local modem RT mode. U-interface operates in local modem COT mode.
3-2	00	Not used.
4	í 0 1	Normal DTMF dialing for A/B adapter. En bloc DTMF dialing for A/B adapter. User must dial # to send numbers.
6-5	í 00 01 10 11	Bundle connections disabled. Bundle connections enabled on answer only. Bundle connections enabled on originate only. Bundle connections enabled.
7	0 1	Modem has S/T module. Modem has U module.

BIT-MAPPED REGISTER S89
Format:		AT [cmds] S89=n [cmds]
Default:		0
Range:		0 - 255
Unit:		Bit-mapped
Description:		Controls encryption and metering pulse.
Bit	Value	Function
0	í 0 1	DES encryption disabled. DES encryption enabled.
1	í 0 1	Attempt single DES only. Attempt triple DES.
2	í 0 1	Public key system enabled. Modem will generate key. Public key system disabled. User must enter key.
3	í 0 1	Keep non-encrypted connection. Disconnect from non-encrypted connection.
5-4	00	Not used.
6	í 0 1	Metering pulse disabled. Metering pulse enabled.

BIT-MAPPED REGISTER S118
Format:		AT [cmds] S118=n [cmds]
Default:		Unidentified
Range:		0 - 54
Unit:		Bit-mapped
Description:		Controls default line speed, low-speed service type, and analog call acceptance.
Bit	Value	Function
0	0	Not used.
1	í 0 1	Use 64Kbps speed for DTE channel 1. Use 56Kbps speed for DTE channel 1.
2	í 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 fax/modem. Use voice service for fax/modem.
5	í 0 1	Use 3.1KHz service for A/B adapter. Use voice service for A/B adapter.
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
Unit:		Bit-mapped
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 signalling DDI function disabled. Point-to-point signalling DDI function enabled.
2	í 0 1	Multipoint signalling DDI function disabled. Multipoint signalling 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.

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

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 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 channel. S122 stores the Most Significant Byte, and S123 stores the Least Significant Byte. To obtain the correct value, use S122 * 256 + S123.

CALL RESUME
Type:	Immediate
Format:	AT [cmds] CRn [cmds]
Description:	Resumes the call with call number n.

CALL SUSPEND
Type:	Immediate
Format:	AT [cmds] CSn [cmds]
Description:	Suspends the current call with call number n.

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

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

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

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

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