Raymar BBI-14.4 Owner's manual

BBI-14.4 Industrial Modem
Installation, Operation and Diagnostics
0049-0001-000 Rev.B
BBI-14.4 Industrial Modem: Installation, Operation, Diagnostics

TABLE of CONTENTS
1. PRODUCT OVERVIEW..................................................................................Page 1
2. PRODUCT DESCRIPTION.............................................................................Page 1
3. MODEM SPECIFICATIONS...........................................................................Page 2
4. SERIAL CONNECTOR SPECIFICATIONS...................................................Page 3
5. TELEPHONE INTERFACE SPECIFICATIONS............................................Page 5
6. POWER SUPPLY SPECIFICATIONS ............................................................Page 6
7. ENVIRONMENTAL SPECIFICATIONS........................................................Page 8
8. APPROVALS ...................................................................................................Page 8
BOARD LAYOUT DRAWING
APPENDIX A: CONNECTOR PIN DEFINITIONS............................................Page A-1
APPENDIX B: AT COMMAND SET..................................................................Page B-1
APPENDIX C: FACTORY CONFIGURATION.................................................Page C-1
APPENDIX D: DIAGNOSTICS ..........................................................................Page D-1
0049-0001-000 Rev.B
BBI-144B Installation, Operation & Diagnostics

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1. PRODUCT OVERVIEW
The BBI-14.4 is an industrial modem for direct connection to public switched telephone lines.
Though similar to commercial modems, the BBI-14.4 contains special features that make it
particularly well suited for industrial applications. These capabilities include:
Environment The BBI-14.4 has been designed explicitly for use in industrial
environments. In addition to an extended temperature range (-40 to +85oC),
the BBI-14.4 includes surge, shock, vibration, and safety parameters superior
to those of conventional commercial modems.
Low Power The BBI-14.4 implements a "low power" standby mode. This mode allows
the BBI-14.4 to consume a small fraction of its active power while waiting
for either controller or telephone activity.
Industrial The BBI-14.4 uses standard industrial connectors for both data and telephone
interfaces. These connectors allow reliable interconnect to other industrial
components. Furthermore, the BBI-14.4 data lines are provided at either RS-
232 or TTL signal levels for both stand-alone and embedded applications.
2. PRODUCT DESCRIPTION
The BBI-14.4 provides dial-up telephone communication capabilities for the industrial
environment. It can be operated stand-alone or as a component of a larger industrial system.
2.1 Telephone Interface
The BBI-14.4 telephone interface operates over two wire loop start lines available in North
America. The telephone line interface is environmentally benign, allowing use in Class I,
Division 2 applications.
2.2 Data Interface
The BBI-14.4 data interface provides RS-232 compatible serial signaling. The data interface
interconnects to industrial controllers at either RS-232E or TTL signal levels. Selectable RS-
232 only or TTL with RS-232 override
2.3 Power
The BBI-14.4B accepts either regulated 4.75 to 5.25 volts DC, unregulated 5.5 to 7.0 volts
DC (battery) or unregulated 9.5 to 18.0 volt power inputs. The unregulated power inputs are
also suitable for use with 6.0 volt and 12.0 volt solar power systems.
2.4 Mechanical
The BBI-14.4 consists of two printed circuit boards: A single two sided baseboard and a four
layer modem board (Telenetics PE14.4)

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3. MODEM SPECIFICATIONS
The BBI-14.4 modem capabilities are based upon the Rockwell RC144ACL modem chipset.
Modem control is through the industry standard 'AT' command set. The BBI-14.4 provides
all popular error correction and data compression capabilities.
The BBI-14.4 provides the following modem features.
Dialing and Data Command Set
RC144ACL (Rockwell) AT command set.
Data Modulations and Speeds
V.32bis 14400, 12000, 14400, 9600, 7200, 4800 bps.
V.32 9600, 4800 bps.
V.22bis 2400, 1200 bps
V.22 1200 bps.
V.21 0-300 bps.
Bell 212A 1200 bps.
Bell 103J 0-300 bps.
Data Modulation Connectivity
Connectivity: 95% or better
Error Correction and Data Compression Specifications
Error Correction MNP Class 2-4, MNP 10, V.42.
Data Compression MNP 5, V.42bis.
Serial Formats and Flow Control
Serial Speeds: 57600, 38400, 19200, 9600, 4800, 2400, 1200, 300bps
Serial Formats: 8N1, 7E1, 7O1, 7N2
Flow Control: RTS/CTS, XON/XOFF, None

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4. SERIAL CONNECTOR SPECIFICATIONS
The BBI-14.4 communicates with industrial controllers through RS-232 compatible serial
signaling. Both RS-232E and TTL signal levels are provided. The RS-232E signal levels are
used to interconnect with RS-232E compatible embedded controllers; the TTL signal levels
are used to interconnect with TTL compatible embedded controllers. The RS-232E signal
levels are also used to configure the BBI-14.4.
The RS-232E and TTL signals are present on several connectors. The RS-232 signal levels
are present on three (3) connectors: the TTL levels are present on two (2) connectors;
The BBI-14.4 RS-232E and TTL signals interfaces are independent. All RS-232E signals are
internally connected together; likewise, all TTL signals are internally connected together. The
RS-232E signals, though, are not internally connected to the TTL signals.
4.1 The following lists the BBI-14.4 serial interfaces. All connector definitions are
described in Appendix A
RS-232 Configuration Connector 1 (J5)
Connector Type: DB9, female, right angle
Signal Levels: RS-232
RS-232 Configuration Connector 2 (J4)
Connector Type: DB9, female, straight board mount.
Signal Levels: RS-232
RS-232 Configuration Connector 3 (TB2)
Connector Type: Part of Alternate Telephone Connector 2,
see below.
Signal Levels: RS-232
TTL Serial Connector 2 (P1)
Connector Type: 15 pin, 0.025" square post, gold plated,
single row
Signal Levels: TTL
TTL Serial Connector 2 (TB3)
Connector Type: 7 circuit, screw-type terminal block
Signal Levels: TTL

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4.2 Serial Interface Selection (Jumper J6)
As previously described, the BBI-14.4 has two separate serial interfaces: one for RS-232E
levels and one for TTL levels. BBI-14.4 interface selection is determined either automatically
or manually.
The BBI-14.4 becomes active and responds to a serial interface in response to either the
interface DTR signal becoming active or in response to an incoming ring signal. In the first
case, the interface DTR signal determines the active serial interface. In the second case,
incoming ring, a manual jumper determines the active interface.
When configured to respond to the RS-232E interface (J6 Jumper Position 1-2), an active RS-
232E DTR signal will power up the BBI-14.4 and its RS-232E line drivers. Communication
to and from the BBI-14.4 will be through the RS-232 E serial interface only. The TTL serial
interface signals will be clamped at inactive signal levels. Also in this configuration, when
incoming ring has been detected, the RS-232E interface will become active.
When configured for the TTL interface (J6 Jumper Position 2-3), active TTL DTR signal will
activate the BBI-14.4. Communication is to and from the controller through the TTL serial
interface only. The BBI-14.4 RS-232E line drivers will be powered off. When an incoming
ring has been detected, the TTL interface will become active.
When in the RS-232E configuration, TTL signals are always ignored. This configuration
allows the BBI-14.4A to be used as a conventional modem.
When in the TTL configuration, though, RS-232E signals can be used for BBI-14.4
configuration. Regardless of the state of the TTL serial interface, an active RS-232E DTR
signal will result in inactivating the TWX serial interface, activating the RS-232E serial
interface. If there is an active modem connection the call is not disconnected. To disconnect
the user must enter the command mode (+++) type ATH or drop DTR (to disconnect) and
reinstate DTR to the active state.
The RS-232E configuration is called stand alone mode. It is intended for applications when
attached to intelligent controllers which can configure the BBI-14.4 in the field. The TTL
configuration is called the embedded mode. It is intended for applications when attached to
older controllers that cannot configure the BBI-14.4 in the field. When in embedded mode,
the RS-232E interface is used to configure the BBI-14.4.
Connector Type 3 pin header
Jumper Positions 1-2: RS232 2-3: TTL with RS232 override
NOTE: Section 6 below discusses the BBI-202T's three power supply options and indicates
which serial interface (RS-232 and/or TTL) is supported by each power option.

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5. TELEPHONE INTERFACE SPECIFICATIONS
The BBI-14.4 contains telephone circuitry for connection to the public switched telephone
network. The circuitry is suitable for loop start telephone lines.
The BBI-14.4 has both primary and alternate telephone connectors. The primary connector is
used for connecting RJ-11 terminated cabling. The alternate telephone connectors provide
terminal strip wiring of telephone cabling. Internally, all connectors are wired together.
The following lists the BBI-14.4 telephone interfaces. All connector definitions are described
in Appendix A.
Telephone Line Type: Two wire loop start lines.
Primary Connector (J1): RJ-11.
Only the center two signals of the RJ-11, (TIP and RING),
are used by the BBI-14.4.
Alternate Connector 1 (TB1): 6 circuit, screw-type terminal block.
Alternate Connector 2 (TB2): 10 circuit, screw-type terminal block.
Both TIP and RING of the primary connector are connected
to the alternate connector 2.
Telephone Polarity: None. The BBI-14.4 telephone circuitry is insensitive to the
telephone line's polarity.
Telephone Functions: Dialing and answering by AT commands. Automatic
answering is also programmable.
Call Progress Detection: Dial tone, busy, and silence.
Digit Dialing Types: Tone and pulse.
Additional Functions: None. The BBI-14.4 does not provide line current
detection, caller ID, distinctive ringing or any other
additional telephone functions.
Telephone Speaker: None.
Telephone LED Indicators: None
Telephone Approvals: FCC Part 68. The BBI-14.4 is also suitable for approval
within Canada.
Safety Suitable for use in Class I, Division 2 Hazardous Locations.

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6. POWER SUPPLY SPECIFICATIONS
The BBI-14.4 contains a low quiescent power regulator. The BBI-14.4 also has a "low
power" standby mode which minimizes overall power requirements when the BBI-14.4 is
used intermittently.
6.1 Power Supply Selection ~ The power supplies are selected through the use of a multi-pin
ganged header (JP1A, B & C) and power is connected to either a 2 circuit, screw-type
terminal block (TB4) or a 15 pin header (P1).
The following lists the BBI-14.4 power interfaces. All connector pin definitions are described
in Appendix A.
Power Connector P1
Connector Type: 15 Pin Header
Selection: Selected by jumper between JP1B & JP1A
Regulated Power Supply Range: 4.75 to 5.75VDC.
Standby Supply Currents: 200uA
Active Supply Currents: 190mA
In-Rush Current: < 250mA
Reverse Protection Method: I.C. Internal Protection
Over-Voltage Clamp Limit: None
Serial Data Interface Supported: RS-232 and TTL
Power Connector TB4
Connector Type: 2 circuit, screw-type terminal block.
Selection: Selected by jumper between JP1B and JP1C
Unregulated Power Supply Range: 9.5 to 18VDC.
Standby Supply Current: 150 uA
Active Supply Current: 125 mA
In-Rush Current: <250 mA
Reverse Protection Method: TransZorb TVS and I.C. Internal Protection
Over-Voltage Clamp limit: Zener diode
Serial Data Interface Supported: RS-232 and TTL
Battery / Solar Panel Connection TB4
Connector Type: 2 circuit, screw-type terminal block.
Selection: Selected by jumper between JP1C Pins 1 & 2
Unregulated Power Supply Range: 5.5 to 7VDC
Standby Supply Current: 150 uA

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Active Supply Current: 125 mA
In-Rush Current: <250 mA
Reverse Protection Method: TransZorb TVS and I.C. Internal Protection
Over-Voltage Clamp limit: Zener diode
Serial Data Interface Supported: RS-232 only

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6.2 Standby Operation
The BBI-14.4 is configured for "low-power" standby operation. When in the standby mode,
the BBI-14.4B consumes only 200uA power. Standby is controlled by the serial interface
(RS-232 or TTL) DTR signal.
The BBI-14.4 will automatically enter standby mode after 30 seconds of no DTR activity.
Standby mode ends when either a ring has been detected on the telephone line or DTR
becomes active. If ringing occurs, the BBI-14.4 increases its power demands only enough to
determine if the ring is valid. If the BBI-14.4 determines the ring invalid, it returns to standby
mode after 30 seconds. If the ring is valid, the BBI-14.4 will answer the call. (Note that the
BBI-14.4B must be in the auto-answer mode, i.e.: S0=1 or greater, see Appendix B)

7. ENVIRONMENTAL SPECIFICATIONS
The BBI-14.4 meets the following environmental specifications.
Operating Temperatures -40 to 85oC
Storage Temperature -55 to 100oC
Relative Humidity 0 to 95% non-condensing.
Altitude 20,000 ft (operating), 40,000 ft (shipping).
Vibration Effect Withstand 10 to 500 Hz at 1 g on any axis per SAMA
PMC-31-1 without damage or impairment.
ESD susceptibility Field connected circuits meet the requirements of IEC
801-2 for ESD withstand capability up to 10 KV.
EMI susceptibility Withstand 27 to 1000 MHz per IEC 801-3 level 1
(1v/m) without damage or impairment.
EMI radiation Meets FCC Rules Part J, Subpart 15, Class A for
radiated emissions.
8. APPROVALS
The BBI-14.4 meets the following approvals:
Telephone FCC Part 68
Emissions FCC Part 15
Environment UL listed (pending) for use in Class I, Division 2,
Groups C and D hazardous locations.
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APPENDIX A. CONNECTOR PIN DEFINITIONS
CONNECTOR P1: TTL Serial Connector 1
1 not used
GND 2 ground
+5VDC 3 regulated 5 volts (4.7 to 5.2VDC)
4 not used
5 not used
TD 6 transmit data to BBI-14.4
RTS 7 request to send to BBI-14.4
DTR 8 data terminal ready to BBI-14.4
RD 9 receive data from BBI-14.4
CTS 10 clear to send from BBI-14.4
DSR 11 data set ready from BBI-14.4
CD 12 data carrier detect from BBI-14.4
13 not used
14 not used
15 not used
CONNECTOR TB3: TTL Serial Connector 2
+5VDC 1 regulated 5 volts
TD 2 transmit data to BBI-14.4
RTS 3 request to send to BBI-14.4
DTR 4 data terminal ready to BBI-14.4
RD 5 receive data from BBI-14.4
CTS 6 clear to send from BBI-14.4
CD 7 data carrier detect from BBI-14.4
CONNECTOR J5: RS-232 Configuration Connector 1
DCD 1 data carrier detect from BBI-14.4
RD 2 receive data from BBI-14.4
TD 3 transmit data to BBI-14.4
DTR 4 data terminal ready to BBI-14.4
GND 5 ground
DSR 6 data set ready from BBI-14.4
RTS 7 request to send to BBI-14.4
CTS 8 clear to send from BBI-14.4
RI 9 ring indication from BBI-14.4
PGND shield protective ground
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CONNECTOR J4: RS-232 Configuration Connector 2
DCD 1 data carrier detect from BBI-14.4
RD 2 receive data from BBI-14.4
TD 3 transmit data to BBI-14.4
DTR 4 data terminal ready to BBI-14.4
GND 5 ground
DSR 6 data set ready from BBI-14.4
RTS 7 request to send to BBI-14.4
CTS 8 clear to send from BBI-14.4
RI 9 ring indication from BBI-14.4
PGND shield protective ground
CONNECTOR J1: Primary Telephone Connector
Dial Pin Leased Line
2 2-Wire: Not Used 4-Wire: Rx
T/R 3 2-Wire: Tx/Rx 4-Wire: Tx
T/R 4 2-Wire: Tx/Rx 4-Wire: Tx
5 2-Wire: Not Used 4-Wire: Rx
CONNECTOR TB1: Alternate Telephone Connector 1
Definition Pin Dial Leased Line
T/R 1 Tip or Ring 2-Wire: Tx/Rx 4-Wire:Tx
T/R 2 Tip or Ring 2-Wire: Tx/Rx 4-Wire:Tx
R 3 2-Wire: Not Used 4-Wire:Rx
R 4 2-Wire: Not Used 4-Wire:Rx
K-GND 5 key ground (not used)
KEY 6 key output (not used)
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CONNECTOR TB2: Alternate Telephone Connector 2
Definition Pin Dial Leased Line
T/R 1 Tip or Ring 2-Wire: Tx/Rx 4-Wire:Tx
T/R 2 Tip or Ring 2-Wire: Tx/Rx 4-Wire:Tx
R 3 2-Wire: Not Used 4-Wire:Rx
R 4 2-Wire: Not Used 4-Wire:Rx
K-GND 5 key ground (not used)
KEY 6 key output (not used)
DTR 8 data terminal ready to BBI-14.4
RD 9 receive data from BBI-14.4
TD 10 transmit data to BBI-14.4
CONNECTOR TB4: Unregulated (9.5-18VDC) or Battery/Solar Power (5.5-7VDC)
Connector
GND 1 ground
EXTVDC 2 power input
JUMPERS JP1A, B & C: Regulated / Unregulated / Battery Power Selector
Jumper Position JP1A to JP1B Regulated 4.75 - 5.25VDC
Jumper Position JP1B to JP1C Unregulated 9.5 - 18VDC
Jumper Position JP1C, Pins 1-2 Battery/Solar Power (5.5 to 7VDC)
JUMPER J6: RS-232 / TTL Data Interface Selector
Jumper Position 1-2 RS-232 only
Jumper Position 2-3 TTL with RS232 override
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APPENDIX B. AT COMMAND SET
The BBI-14.4 modem is based upon the Rockwell RC144ACL chipset. This chipset contains
Rockwell's "AT" command set.
The RC144ACL is part of the family of RC96ACXXX/RC144XXX modem device set family. The
low power version is used in the BBI-14.4B and will support both facsimile and data operation at
14400 bits per second (bps).
The full Rockwell command set specification is available from Rockwell and is contained within their
document:
AT Command Reference Manual
for the RC144ACi,RC144ACL and
RC144ACG Modem Families.
Order No.883
Rev. 3, May 5, 1995
A summary of the Rockwell command set is provided on the following pages B-3 through B-6.
The revision of the Rockwell firmware within the BBI-14.4 is Telenetics Version 1.4T.
1. BBI-14.4 Command Set Modifications
The BBI-14.4 contains a modified version of the standard Rockwell AT command set. These
modifications are as follows:
(a) &DN Modification
The &Dn command is configure in active profile 0 during Final System test, for &D0 so
that DTR is ignored (assumed ON)
(b) &Cn Modification
The &Cn command is set for &C1 in Final System test (Carrier Detect will follow the
state of the carrier.
(c) RTS/CTS Modification
The &Rn command has been modified (Code Version 1.4T) to the following:
&R0 is set so that CTS will follow RTS. There is a CTS/RTS delay of 5ms to 100ms
with an RS232 interface and no delay with a TTL interface.
&R1 has not been changed; CTS is controlled by the flow control functions.
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2. AUTO DIAL
Command \D1 will enable Auto Dial: When DTR goes from an OFF to ON condition, and \D1
is set, the modem will auto dial the phone number stored in location &Z0 (up to 45 digits).
Command \D0 (default) will disable the Auto Dial feature.
3. IDENTIFICATION PARAMETER
Command I3 will report the firmware version V2.41_T1442.
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SUMMARY OF THE ROCKWELL "AT" COMMAND SET
To communicate using the modem, use an asynchronous communication program. The command set
for the Telenetics modems is compatible with the Hayes command set.
The modem is controlled and configured by the AT (attention command). Each command consists of
the following elements (with exception of the A/and the +++ command which will be discussed later).
1. The two character sequence AT
2. A command
3. A command parameter
4. A carriage return
A command is not entered until a carriage return <ENTER> is entered. Spaces entered are ignored.
For example, to enter the command `Answer', type ATA and <ENTER>.
Some commands do not have parameters. Any missing parameters in a command are assigned the
value zero, which may be a valid parameter for the command. The sequence followed by AT
command causes the modem to enter a command state. That is, AT without a command serves as a
wake up code and an "OK" appears on the screen.
The modem queues commands in a 40-character command line. The command line begins with AT
and can have several commands. A separator is not required between the commands.
The command line format is the "AT" prefix, followed the required commands from the attached list
and terminated with a Carriage Return.
When a carriage return is received, the commands are performed in the order in which they are sent to
the modem. If more than 40 characters are sent to the modem, an error occurs and all commands must
be re-entered.
BASIC AT COMMANDS...
A/ Execute Previous Command, without Striking <CR> Key
AT Attention
AAnswer Immediate
BO CCITT V.22 Mode
B1 Bell 212A Mode -DEFAULT
DP Dial Using Pulse Dial
DDial Command
DT Dial Using DTMF Tone Dial Default
DL Dial Using Last Number, Regardless of Last Command
DW Wait for Dial Tone For Period Set by S7 register
AD@ Quiet Answer: Wait for 5 seconds of Silence Before Dialing
AD! Hookflash: Commonly Used PBX Systems
DR Reverse Answer Mode
DSn Dial Stored Number n=0 - 3
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AD/ Wait 0.125 Seconds
AD; Returns to Command Mode After Dialing
AD, Pause fo Time Set by S8 Register
E0 Command Echo Disabled
E1 Command Mode Echo Enabled -DEFAULT
F0 No Echo when Connected
F1 Echo Transmitted Characters when Connected -DEFAULT
H0 Go On Hook (Open Relay)
H1 Go Off Hook (Close Relay)
10 Identification Code
I1 Identification Code
I2 "OK" Response if Checksum Verifies
I3 Revision Number
L0 Lowest Volume setting
L1 Same as L0
L2 Medium Volume Setting -DEFAULT
L3 Maximum Volume
M0 Speaker Always Off
M1 Speaker On Until Carrier is Detected -DEFAULT
M2 Speaker Always On
M3 DTMF Tones are Not Heard, but Speaker is On Until Carrier Detected
0Originate Immediate or eturn to Data Mode
Q0 Enable Result Code -DEFAULT
Q1 Disable Result Code
Sn? Provide S Register Value (n = 0 - 27)
Sn= Set Register Value (n = 0 - 27)
V1 Verbose Response -DEFAULT. See V0 for Response
W0 Negotiation Process Result Codes Not Required -DEFAULT
W1 Negotiation Process Result Codes Returned
X0 Enable Result Codes 0-4
X1 Enable Result Codes 0-5
X2 Enable Result Codes 0-6
X3 Enable Result Codes 0-5 and 7 and 10
X4 Enable Result Codes 0-10 -DEFAULT
Y0 Disable Long Space Disconnect -DEFAULT
Y1 Enable Long Space Disconnect
Z0 Software Reset, Restore S Register from Profile Location 0
Z1 Restore S Register from Profile Location 1 in NVRAM
&C0 EIA Carrier Line Always Forced on -DEFAULT
&D0 DTR Always on -DEFAULT
&D1 Modem Goes to Command Mode When DTR Goes OFF
&D2 Modem Goes on HOOK and Return to Command Mode when DTR Goes OFF
&D3 Modem Initializes when DTR Goes OFF
&F Fetch S Register from EPROM for Factory Default
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&G1 500 Hz Guard Tone Enable
&G2 1800 Hz Guard Tone Enabled
&J0 RJ-11 Select -DEFAULT
&J1 No Function
&L0 Switched Line Select -DEFAULT
&L1 Leased Line Select (Not Supported)
&M0 Asynchronous Mode -DEFAULT
&P0 US Make/Break Ratio for Pulse Dialing -DEFAULT
&P1 UK Make/Break Ratio for Pulse Dialing
&Q0 Same as &M0
&R0 Clear to Send (CTS) Follows RTS -DEFAULT
&R1 CTS Always On
&S0 Data Set Ready (DSR) Always on -DEFAULT
&S1 DSR Normal
&T0 Terminate Test in Progress -DEFAULT
&T1 Initiate Local Analog Loopback for time Set by Register S18
&T2 Not Defined
&T3 Initiate Digital Loopback for time Set by Register
&T4 Enable Remote Digital Loopback (RDLB) Response
&T5 Disable Remote Digital Loopback (RDLB) Response
&T6 Initiate RDLB
&T7 Initiate RDLB with Self Test
&T8 Initiate ALB with Self Test
&W0 Write S Register Into User Profile Number 0
&W1 Write S Register Into User Profile Number 1
&X0 Modem Provides Transmit Clock
&X1 DTE Supplies Transmit Clock
&X2 Slave Clock Mode (Not Supported)
&Y0 Power Up recall user Profile 0
&V List Configuration Both Active and Stored
&Zm=An Store Telephone Numbers into NVRAM (XL93C46) where:
m is the Number Location (0-3)
A is P or T (pulse or Tone)
n is the Telephone Number
%E0 Disable line quality monitor and auto retrain.
%E1 Enable line quality monitor and auto retrain.
%E2 Enable line quality monitor and fallback/fall forward.
%L Return received line signal level.
%Q Report the line signal quality.
\D0 Selects AutoDial mode DTR is switched from OFF to ON the number in Z0 location
will be dial
\D1 Auto Dial disable (default)
\G0 Disable modem to modem flow control.
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\G1 Enable modem to modem flow control.
\H0 Dial Mode (Default)
\H1 Lease Line Mode
\Kn Controls break handling during three states:
When modem receives a break from the DTE:
\K0,2,4 Enter on-line command mode, no break sent to the remote modem.
\K1 Clear buffers and send break to remote modem.
\K3 Send break to remote modem immediately.
\K5 Send break to remote modem in sequence with transmitted data.
When modem receives \B in on-line command state:
\K0,1 Clear buffers and send break to remote modem.
\K2,3 Send break to remote modem immediately.
\K4,5 Send break to remote modem in sequence with transmitted data.
When modem receives break from the remote modem:
\K0,1 Clear data buffers and send break to DTE.
\K2,3 Send a break immediately to DTE.
\K4,5 Send a break with received data to the DTE.
\M0 Lease Line Modem in Answer Mode
\M1 Lease Line Modem in Originate Mode
\N0 Select normal speed buffered mode.
\N1 Select direct mode.
\N2 Select reliable link mode.
\N3 Select auto reliable mode.
\N4 Force LAPM mode.
\N5 Force MNP mode.
ECC COMMANDS...
%C0 Disable data compression.
%C1 Enable MNP 5 data compression.
%C2 Enable V.42 bis data compression.
%C3 Enable both V.42 bis and MNP 5 compression.
\A0 Set maximum block size in MNP to 64.
\A1 Set maximum block size in MNP to 128.
\A2 Set maximum block size in MNP to 192.
\A3 Set maximum block size in MNP to 256.
\Bn Send break of n x 100 ms.
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