

                         жЗ жЗ в     в в    жЗ в  Зж жЗ
                         ЧЖ К  К     К К    ЧН К  КК гЗ                         
                         Нг гН гФ    а а    Н  гФ гН гН                         
 

                                ACL II+TM
                        Advanced Communication Link
                  For DTE/DCE Asynchronous Communications


                               User's Guide



        CONTENTS

        Notices   i

        CHAPTER  1    Introduction to the ACL II+
        General description of ACL II+ adapter                  1
        Physical description of the adapter                     2
        System requirements                                     2
        Application Flexibility                                 3

        CHAPTER  2    Installation
        Precautions & hardware configuration                    4
        Switch & jumper locations                               5
        Jumper settings                                         6
        8-Position SW_IRQ settings                              6
        4-Position SW _ I/O address & extended memory
                enable  settings                                8
        How to install the adapter board                        9
        How to connect external panel                          11
        How to connect serial devices                          11
        I/O port pin assignments                               12
        Set up software to match hardware                      14

        APPENDICES
        A. ACL II+ specifications                              15
        B. Hardware configuration                              16
        C. Popular adapters and their memory locations         17
        D. ACL II+ dual port addresses and memory usage        18
        E. I/O register definitions                            19
        F. Interface cable wire list                           20

        CUSTOMER Assistance                                    22

        WARRANTY                                               23
                ACL II+ User's Guide
                manual part number:  650111-03
                c 1995 by Star Gate Technologies, Inc.
                Printed in U.S.A.

        Original issue:  September 1991

        All brand and product names are trademarks or registered trademarks
        of their respective companies.


                SPECIFICATIONS NOTICE
        Star Gate Technologies does not assume any liability arising from
        either the application or the use of any product or circuit described
        in this manual.

        We also reserve the right to make changes to any product to improve
        reliability, function, or design. Therefore, specifications are
        subject to change without notice.

        This manual has been carefully checked, and its information is
        believed to be reliable.  However, no responsibility is assumed for
        inaccuracies.

        This information does not give the purchaser any license under the
        patent rights of the manufacturer, or others.



                RFI WARNING NOTICE
        We recommend that all devices connected to this product have shielded
        cables with metal RFI/EMI connector hoods.



        CHAPTER 1
        Introduction


        GENERAL DESCRIPTION
        The ACL II+TM (Advanced Communication Link II+) is an intelligent
        expansion board that adds serial ports to an IBM PC/AT or compatible
        computer. An ACL II+-equipped computer, when used with a multiuser
        operating system, becomes a powerful tool as the host computer for a
        multiuser system supporting multiple active serial devices.

        The ACL II+ relieves the host PC of communication responsibilities
        while supporting up to eight EIA-232-D, EIA-422, or EIA-485
        asynchronous devices. These include terminals, printers, plotters,
        modems, other computers and many other serial input/output devices.

        Versatility is at your fingertips. With the help of the device driver
        software, you can select either a Data Terminal Equipment (DTE) or a
        Data Communications Equipment (DCE) setup for each EIA-232 port.

        Up to four standard ACL II+ boards may be used in a host PC,
        increasing your capabilities to 32 ports. With the installation of
        special PAL devices, the number of ACL II+ boards that can be used
        in a host PC is limited only by the available IRQs
        (if IRQs are used), available 16-bit slots, the power supply
        capacity and the operating system installed.

For a complete listing of ACL II+ specifications, please refer to Appendix A.

PHYSICAL DESCRIPTION
The Advanced Communication Link II+ consists of six items in one package
(roughly listed in order of unpacking):

1.  USER'S GUIDE
This guide describes how to set up and install the hardware.
It is designed to be kept with the guide to operations manual of the host PC.

2.  ACL II+ DEVICE DRIVER (on 5.25- and 3.5-inch floppy diskette)
These diskettes contain the device driver and support files for the
ACL II+.

3.  DEVICE DRIVER INSTALLATION MANUAL
This manual describes the installation and operation of the device driver
software.

4.  ACL II+ ADAPTER BOARD

5.  BOARD-TO-PANEL INTERFACE CABLE

6.  EXTERNAL PANEL (EIA-232, EIA-422, or EIA-485 option)  This panel
serves as a junction box.  It contains the eight serial ports for connection
with up to eight serial devices, as well as the socket for connection with
the Board-to-Panel Interface Cable. The wiring for the serial devices
complies with Electronic Industry Association (EIA) standard EIA-232,
EIA-422, or EIA-485.


System Requirements
The following minimum system requirements are necessary for proper operation
of the ACL II+ adapter:

љ The host PC must be an IBM ISA-bus compatible.

љ One 16-bit expansion slot must be available for each ACL II+ adapter.

љ At least one IRQ line must be available if interrupts are to be used.
APPLICATION FLEXIBILITY FOR PROGRAMMERS
The ACL II+ adapter is mainly a device to enhance communications, but it has
the processing power to do other tasks as well.  With additional programming
by the user, the ACL II+ adapter can:

љ Perform line discipline functions, such as local terminal emulations and
character conversions.

љ Perform file-oriented algorithms, such as data compacting, on an
inter-channel basis.  For example, a file can be received through one port,
processed, then retransmitted through the same, different, or multiple ports
simultaneously.

љ Reconcile format differences without host computer intervention, making it
appear as if one device is directly compatible with another system, even
though the actual format is different.  For example, an intelligent repeater
which converts ASCII to EBCDIC.

If you need programming information, please call 1-800-STAR GATE
(1-800-782-7428). Ask your Sales Representative for a copy of the ACL Family
Technical Reference Manual.



        CHAPTER 2
        Installation



        PRECAUTIONS
The ACL II+ adapter board contains several components that may be permanently
damaged if the board is handled improperly.  To avoid accidental damage,
follow these recommendations:

љ Before handling the board, touch a grounded object to discharge any static
electricity that has built up on your body.
љ Hold the board only by its edges.
љ Never insert or remove the board while power is applied to the computer.
Once the computer power switch is shut off, wait at least 10 seconds for the
power supply to discharge before inserting or removing the adapter.


        HARDWARE CONFIGURATION
The information you will need to set up the hardware includes:

From reading the software driver and application program
documentation...

љ check if the driver offers interrupt-driven and/or polled mode operation
љ if given both, select the mode of operation by checking your application
program for the best mode to use
љ if you are using interrupt-driven operation, check which interrupts
  are offered by the driver.

From your records and host PC documentation... find out:
љ IRQs that are in use and no longer available to the ACL II+ driver, if you
are using interrupts
љ if the host PC uses a cache memory
љ available I/O and memory ranges.

ACL II+ SWITCHES AND JUMPERS
Before installing the ACL II+ board into your host PC, you may need to
confirm the default settings or make some other adjustments to the switches
shown below.

You can set up and install multiple ACL family boards at the same time.
Just make sure that their I/O addresses do not conflict.

    кФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФП
    Г                                                                  Г
    Г                                                           JMP4   Г
    Г                                                   JMP3кП  кП     Г
    Г                                                       Рй  Рй     Г
    Г                                                                  Г
    Г                     4-POSITION      8-POSITION                   Г
    Г                           кSWФФП  кФФSWФФФФФП                    Г
    Г                           РФФФФй  РФФФФФФФФФй                    Г
    РФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФП          кФФП           кФФй
                                          РФФФФФФФФФФй  РФФФФФФФФФФФй


Figure 1 _ Jumper and DIP switch locations

Part                    4-position              8-position
                        DIP switch              DIP switch

Function                I/O address             IRQ selection

Default              all  switches OFF        only position 3 ON
                        (200-204H)              (IRQ 5)


Figure 2 _ Description of DIP switches
JMP3 & JMP4_EIA-232 vs. EIA-422/EIA-485
PANEL POWER SUPPLY JUMPER SETTINGS
Jumpers JMP3 and JMP4 switch the power supply to the external panel. They
allow you to set up the ACL II+ to support either EIA-232 or EIA-422/EIA-485
panels.  For EIA-232 panels, make sure that no shunt is installed on JMP3 or
JMP4. For EIA-422 or EIA-485 panels, make sure that a shunt is installed on
both JMP3 and JMP4. Default settings will match the type of panel you
bought--no shunts for EIA-232 external panels, both shunts installed for
EIA-422 or EIA-485 panels. For pin-outs, see page 12.


8-POSITION SW -- IRQ SETTINGS
The 8-position DIP switch is used to select polled mode operation, or the IRQ
used in the interrupt  mode.  Select the mode best suited to your application
if both are offered by the device driver.

љ    Turning OFF all switches selects the polled mode.

љ    Turning ON a switch selects the corresponding IRQ, shown below.

                 кФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФП
                 Г кФП кФП кФП кФП кФП кФП кФП кФП  Г
           ON    Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г  Г
                 Г УФД УФД УФД УФД УФД УФД УФД УФД  Г
                 Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г Г  Г
           OFF   Г РФй РФй РФй РФй РФй РФй РФй РФй  Г
                 РФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФй

Switch position:    1   2   3   4   5   6   7   8
IRQ:                3   4   5   9  10  11  12  15

Figure 3 _  8-position DIP switch settings for selecting IRQ
(default setting of IRQ 5 shown)

NOTE: After making an IRQ selection, record your choice for future reference
in Appendix B.


GUIDELINES FOR SETTING IRQS
If the device driver is to be interrupt-driven, make sure that each ACL  II
board:

љ along with every other device installed in the host PC has a unique IRQ
(unless the driver allows several ACL family boards to share interrupts)

љ has only one switch on the 8-position SW in the ON position.

NOTE:  IRQ 5 is the hardware default because most of the device drivers we
sell use interrupts, and our Tech Support specialists have found relatively
few conflicts with IRQ 5.


4-POSITION SW_I/O ADDRESS AND EXTENDED MEMORY ENABLE SETTINGS
Positions 1 and 2 of the 4-position DIP switch are used to select the
I/O address of the board's I/O registers.  Remember to select an unused and
unique I/O address for each board. The selections are listed as follows:

                     кФФФФФФФФФФФФФФФФФФФФФФФФФП
               ON    Г  кФФП кФФП  кФФП  кФФП  Г
                     Г  Г  Г Г  Г  Г  Г  Г  Г  Г
                     Г  УФФД УФФД  УФФД  УФФД  Г
               OFF   Г  Г  Г Г  Г  Г  Г  Г  Г  Г
                     Г  РФФй РФФй  РФФй  РФФй  Г
                     РФФФФФФФФФФФФФФФФФФФФФФФФФй
Switch
positions:               1     2     3      4


                Switch positions:       I/O Address
                1       2               (Hexadecimal)
                OFF     OFF             200,    204
                ON      OFF             300,    304
                OFF     ON              600,    604
                ON      ON              700,    704


Set switch positions 1 and 2 to select an I/O address that is not used by any
other device in the host PC. To avoid conflicts, remember that the actual I/O
address occupies two bytes due to partial decoding.
For example, 200-201H and 204-205H for the default setting.
(Check your software driver for its I/O address usage.)

Switch position 3 is covered on the next page.

Switch position 4 is not used for setup. Confirm the default
OFF setting.

Figure _ 4-Position DIP switch settings for I/O addresses
(default setting for 200H, 204H shown)

NOTE:  Programmers who wish to study the definition of the I/O registers,
please see Appendix E.
4-POSITION SW_I/O ADDRESS AND EXTENDED MEMORY ENABLE SETTINGS
Positions 1 and 2 of the 4-position DIP switch are used to select the
I/O address of the board's I/O registers.  Remember to select an unused and
unique I/O address for each board. The selections are listed as follows:


SWITCH POSITION 3_EXTENDED MEMORY ENABLE
When the switch in position 3 is in the:

љ OFF position, you can locate the dual port memory anywhere in the first 16
megabytes of the host PC's memory space. This is the factory-set default
position.

љ ON position, you can locate the dual port memory in only the first megabyte
of the host PC's memory space.

If the host PC has a cache memory, the caching may interfere with the
operation of the ACL II+.
  Either:

љ disable the host PC's cache

љ or place this switch in the ON position to keep the dual port memory in
the first megabyte of the address space.  Cache memory typically does not
act on addresses A0000H through F0000H in the first megabyte.




HOW TO INSTALL THE ADAPTER BOARD
The ACL II+ adapter board may be installed into any IBM PC/AT computer or
any 286, 386 or 486-based ISA-bus compatible.  Follow this procedure:

1.  Place the computer, monitor and all peripheral device POWER switches in
the OFF position.

2.  Disconnect all power cables from the rear of the computer chassis.

3.  Get the guide to operations manual supplied with the computer.
Follow the instructions for removing the computer cover and installing a
board.

4.  Select a slot. The ACL II+ board may be installed in any 16-bit
(full-length) expansion slot.

5.  Remove the retaining screw holding the expansion slot cover plate.
Lift off and save the plate for later use.

6.  Hold the ACL II+ board and carefully align the board's edge connector
with the expansion slot connector.  Firmly press the board straight down
into the expansion slot connector.  Make sure that the board is pushed in
all the way.

7.  Replace the retaining screw and tighten the screw to secure the board.

8.  After installing the board, follow the instructions in the guide to
operations manual for replacing the computer cover.  Then reconnect all power
cables.

NOTE:  To remove the board, follow these steps in reverse.

HOW TO CONNECT THE EXTERNAL PANEL
Follow these steps to connect the board-to-panel interface cable to the
ACL II+ adapter board and the external panel.

1.  Make sure the host PC power is OFF before plugging (or unplugging) the
interface cable.

2.  Plug the mating end of the interface cable into the receptacle on the
external panel. Plug the other end of the interface cable into the mating
receptacle on the ACL II+ adapter.

Standard EIA-232 Panel & Cable: The 62-pin receptacles on both the ACL II+
adapter and the external panel are the same.  The interface cable is a
straight-through cable with both ends the same, so you can plug either end
in either receptacle.  The cable's wire list is in Appendix F.

3.  Tighten the retaining screws on each end of the cable so that a solid
connection is made on both ends.


HOW TO CONNECT SERIAL DEVICES
Connect from one to eight peripheral devices to the eight female ports on
the EIA-232, EIA-422, or EIA-485 external panel. Use serial interface cable
that has shielded wires and metalized RFI/EMI connector hoods.  If not,
increased RFI/EMI emissions may result. Figure 7 shows how ports are
numbered for the EIA-232, EIA-422 and EIA-485 external panels.


     кФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФП
     Г  кФФП                                                Г
     Г  Г  Г     кФП  кФП  кФП  кФП  кФП  кФП  кФП  кФП     Г
     Г  Г  Г     Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г     Г
     Г  Г  Г     Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г     Г
     Г  Г  Г     Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г     Г
     Г  Г  Г     Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г  Г Г     Г
     Г  Г  Г     РФй  РФй  РФй  РФй  РФй  РФй  РФй  РФй     Г
     Г  РФФй     P1   P2   P3   P4   P5   P6    P7  P8      Г
     РФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФФй

Figure 7 _ Serial ports on the External Panel

Each I/O port on the EIA-232 panel is wired for compliance with Electronic
Industry Association (EIA) standard EIA-232-D.  Through the driver software,
you can set up each EIA-232 port as either Data Terminal Equipment (DTE) or
Data Communication Equipment (DCE). Pin signals are listed on the next page.

I/O PORT PIN SIGNALS
EIA-232 PANEL BOX WITH DB-25 FEMALE CONNECTORS

DTE                                             DCE
Pin     Signal          DTE                     Pin     Signal  DCE
#       Name            Use                     #       Name    Use
2       TxD             output                  2       TxD     input
3       RxD             input                   3       RxD     output
4       RTS             output                  4       RTS     input
5       CTS             input                   5       CTS     output
6       DSR             input                   6       DSR     output
7       GND             signal ground           7       GND     signal ground
8       DCD             input                   8       DCD     input
20      DTR             output                  20      DTR     input




NOTES:
љ    The default software setup for ports at power-up is DTE.

љ    To connect a DTE port to a DCE port, use a straight-through cable.

љ    If a particular serial device needs no modem handshake signals, connect
only pins 2, 3 and 7. We recommend connecting only the necessary signals in
the EIA-232-D interface cable.


                EIA-422  PANEL BOX WITH DB-9 FEMALE CONNECTORS

                                PIN     SIGNAL
                                2       RD-
                                4       XD+
                                7       XD-
                                9       RD+

                EIA-485 PANEL BOX WITH DB-9 FEMALE CONNECTORS

                                PIN     SIGNAL
                                2       RXD-
                                4       TXD+
                                7       TXD-
                                9       RXD+



Many RS-485 multidrop connections require a two wire configuration
(TXD+/RXD+, TXD- RXD-).  In order to get the two wire configuration, the
connector on each port must connect TXD+ to RXD+, and TXD- to RXD-
(please see figure below).


        TXD+ ФФФФФФФП
                    УФФФ TXD+/RXD+
        RXD+ ФФФФФФФй

        TXD- ФФФФФФФП
                    УФФФ TXD-/RXD-
        RXD- ФФФФФФФй

SET UP SOFTWARE TO MATCH THE HARDWARE
To prepare for software installation, follow these steps:

1.  ACL II+ boards can have either a 16K or 64K byte dual port memory.
Check the dual port memory size on your adapter board. Look at the part
number on your invoice if you are unsure of the size.

2.  Be aware that the ACL II+ dual port can't share memory space with other
types of adapters. Check the records of your host computer to locate an
unused memory space that is large enough to accommodate the dual port of
your board.  If your records are incomplete, see Appendix C for a list of
popular PC adapters and their typical locations and memory usage.

3.  Be aware that a 16K byte dual port must be located on a 16K boundary
during software installation; a 64K dual port on a 64K boundary. If you are
unclear about what boundary address you can use, see Appendix D for a list
of suggested  boundary addresses.

Now please refer to the Installation Manual for the device driver software
to load the software driver for the ACL II+ board from the supplied diskette
and configure it to match the hardware.


APPENDIX A


ACL II+ SPECIFICATIONS

Number of Channels              8 maximum

Interface Format                Serial with control lines:
                                DTE or DCE configuration, software
                                switchable for EIA-232-D

Communications                  50 to 115,200 baud selectable
                                under program control

Software Program                Parity: Even, odd, mark, space or Choices
                                none.  Character length: 5, 6, 7 or 8
                                bits.  Stop bit length: 1 or 2 bits.

External Panel                  (8)   25-position D-shell female
                                receptacles for EIA-232, 9-position
                                D-shell female receptacles
                                for EIA-422 or EIA-485.

I/O Channel Address                     2 locations per setting.
                                        Four settings per board.

Operating Temperature                   0oC to 55oC

Storage Temperature                    -10oC to 70oC

Relative Operating                      10% to 90% noncondensing
Humidity

Appendix B



HARDWARE CONFIGURATION
Record the hardware configuration of the ACL II+ board and any other boards
in the host PC here.  Use this for future reference to avoid conflicts.

ACL II+   Slot ______   IRQ______  I/O address___________

Dual port boundary address_____________


_______   Slot ______   IRQ______  I/O address__________

Boundary address____________

_______   Slot ______   IRQ______  I/O address__________

Boundary address____________

_______   Slot ______   IRQ______  I/O address__________

Boundary address____________

_______   Slot ______   IRQ______  I/O address__________

Boundary address____________

_______   Slot ______   IRQ______  I/O address__________

Boundary address____________

_______   Slot ______   IRQ______  I/O address__________

Boundary address____________


APPENDIX C

POPULAR  ADAPTERS AND THEIR
MEMORY LOCATIONS
Caution: To avoid memory contention, always check your system memory map
before assigning the ACL II+ memory space. Some popular adapters whose
memory spaces cannot be shared by the ACL II+'s dual port memory are shown
in the generic PC memory map below at their usual locations.
FFFFFF  AT extended memory (15 M)          (Upper limit of 386 and AT systems)

100000
FFFFF   ROM

F0000
EFFFF   Area usually used in 386s or ATs

E0000
DFFFF   Recommended location for 64K LIM in ATs and 386s

D0000
CFFFF
        User area address locations

CD000
CCFFF   Fixed disk (8K, 16K or 32K)--ESDI, SCSI, RLL bios
        (some to CBFFF)
C8000
C7FFF   ROM expansion (16K)                          VGA adapters

C4000
C3FFF                           EGA adapters

C0000
BFFFF   CGA, MDA, HGA adapters

B0000
AFFFF

A0000
9FFFF   640K system RAM


00000

APPENDIX D

ACL II+ DUAL  PORT ADDRESSES
AND MEMORY USAGE
The ACL II+ dual port address is the location in host memory space for the
dual ported memory residing on the ACL II+ board.  For a 16K dual port, the
address must be on a 16k byte boundary; for 64K dual port, the address must
be on a 64K boundary.  Look below for a list of possible locations.
See Appendix C for the memory usage of some popular adapters.


    Dual port    Base1              ACL II+ board
      size       memory          dual port address (hex)

      16K   256K, 512K, 640K     A0000 B0000 C0000 D0000
                                 A4000 B4000 C4000 D4000
                                 A8000 B8000 C8000 D8000
                                 AC000 BC000 CC000 DC000

            256K, 512K only      80000 90000 84000 94000
                                 88000 98000 8C000 9C000

               256K only         40000 50000 60000 70000
                                 44000 54000 64000 74000
                                 48000 58000 68000 78000
                                 4C000 5C000 6C000 7C000

       64K   256K, 512K, 640K    A0000 C0000 D0000

             256K, 512K only     80000 90000

                256K only        40000 50000 60000 70000

1Base memory is the amount of system RAM resident and enabled in the system
unit.

NOTES:
Though the  ACL II+ dual port can be located anywhere in the AT's 16
megabytes of address space, most often it is placed within the first 1
megabyte to avoid conflicts with cache memory.  First megabyte addresses
are listed here.

 We generally recommend a dual port address of D0000H because this area is
 relatively free of conflicts.

        APPENDIX E

        I/O REGISTER DEFINITIONS
A pair of registers is used to select the dual port boundary address of the
board.  The 4-position DIP switch is used to locate these registers at one
of four address locations. The bit definitions for the registers are given
below.

Map Register
I/O Location            Bit Position
                         7     6     5     4     3     2     1     0

200, 300, 600 or 700    A19   A18   A17   A16   A15   A14    R1    E2

{A19 - A16 store the least significant boundary address bits.}

For 16K byte dual port boards, bits A14 to A19 are used. For 64K byte dual
port boards, only bits A16 through A19 are used, and A14 and A15 should be
written as zeros (0) for future compatibility.

1Writing a  "1"  to the reset bit invokes a hardware reset of the board.
This bit should be set to 1 for at least 100 milliseconds to ensure that the
processor resets.

2The map register also contains the dual port enable bit. Writing a "1" to
the dual port enable bit enables the dual port memory.


Megabyte Map Register
I/O Location                       Bit Position
                        7     6     5     4     3     2     1     0

204, 304, 604 or 704    0     0     0     0    A23   A22   A21   A20

{A23 - A20 store the most significant boundary address bits.}

When switch position 3 of the 4-position DIP switch is ON, bits A20 to A23
are forced to zero, keeping the dual port address in the first megabyte of
memory.

APPENDIX F
EIA-232 INTERFACE CABLE WIRE LIST

Signal Name                     Connector      Cable
 (DTE)          (DCE)           Box Signal      Pin
TxD1            RxD1            P1-2            25
RxD1            TxD1            P1-3             3
RTS1            CTS1            P1-4            24
CTS1            RTS1            P1-5             5
DSR1            DTR1            P1-6             4
GND             GND             P1-7
DCD1            NA              P1-8             7
DTR1            DSR1            P1-20           26

TxD2            RxD2            P2-2            29
RxD2            TxD2            P2-3            50
RTS2            CTS2            P2-4            49
CTS2            RTS2            P2-5            27
DSR2            DTR2            P2-6            28
GND             GND             P2-7
DCD2            NA              P2-8            36
DTR2            DSR2            P2-20            6

TxD3            RxD3            P3-2             2
RxD3            TxD3            P3-3             1
RTS3            CTS3            P3-4            23
CTS3            RTS3            P3-5            22
DSR3            DTR3            P3-6            43
GND             GND             P3-7
DCD3            NA              P3-8            46
DTR3            DSR3            P3-20           44

TxD4            RxD4            P4-2             8
RxD4            TxD4            P4-3            30
RTS4            CTS4            P4-4            32
CTS4            RTS4            P4-5             9
DSR4            DTR4            P4-6            31
GND             GND             P4-7
DCD4            NA              P4-8            47
DTR4            DSR4            P4-20           10

Signal Name                     Connector      Cable
 (DTE)          (DCE)           Box Signal      Pin
TxD5            RxD5            P5-2            34
RxD5            TxD5            P5-3            55
RTS5            CTS5            P5-4            13
CTS5            RTS5            P5-5            54
DSR5            DTR5            P5-6            14
GND             GND             P5-7
DCD5            NA              P5-8            20
DTR5            DSR5            P5-20           15

TxD6            RxD6            P6-2            58
RxD6            TxD6            P6-3            41
RTS6            CTS6            P6-4            19
CTS6            RTS6            P6-5            61
DSR6            DTR6            P6-6            59
GND             GND             P6-7
DCD6            NA              P6-8            57
DTR6            DSR6            P6-20           60

TxD7            RxD7            P7-2            53
RxD7            TxD7            P7-3            52
RTS7            CTS7            P7-4            11
CTS7            RTS7            P7-5            40
DSR7            DTR7            P7-6            33
GND             GND             P7-7
DCD7            NA              P7-8            42*
DTR7            DSR7            P7-20           12

TxD8            RxD8            P8-2            18
RxD8            TxD8            P8-3            39
RTS8            CTS8            P8-4            17
CTS8            RTS8            P8-5            38
DSR8            DTR8            P8-6            37
GND             GND             P8-7
DCD8            NA              P8-8            21*
DTR8            DSR8            P8-20           16

GND             GND                             35, 45, 48, 51, 56, 62

NA = not applicable
*When shunts are installed on JMP3 and JMP4, and an EIA-422 or EIA-485
external panel is used, these lines supply +5V to the external panel.
CUSTOMER ASSISTANCE


For Customer Service or Sales assistance, call 1-800-STAR GATE
(1-800-782-7428) or 216-349-1860 from 8 a.m. to 6 p.m., Eastern Standard Time.
You can also use our BBS (216-349-2904). Our Technical Support hours are
from 8:00 a.m. to 5:30 p.m., EST. If you have any comments, suggestions, or
corrections regarding this manual, please make photo-copies of the affected
pages, indicate your comments on the copies, and mail or FAX the copies to
the address or FAX number below.
FAX (216) 349-1978
Star Gate Technologies, Inc.
Attn: Technical Documentation Dept.
29300 Aurora Road
Solon, Ohio 44139

LIMITED WARRANTY

Star Gate  Technologies, Inc., warrants the ACL II+ adapter against
defective materials or workmanship for a period of one (1) year from the date
of original purchase.

This limited warranty is void if the adapter has been damaged by accident,
improper modifications, neglect, improper service, or other causes not
arising out of defects in material or workmanship.

If this product is not in good working order as warranted above, your only
remedy shall be repair or replacement. The choice of either repair or
replacement is at the discretion of Star Gate Technologies. In no event will
Star Gate Technologies, Inc., be liable to you for any damages, including
lost profits, lost savings, or other incidental or consequential damages
arising out of the use or inability to use such a product, even if Star Gate
Technologies, Inc., has been advised of the possibility of such damages, or
any claim by any other party.

Note:   Some states do not allow exclusion or limitation of incidental or
consequential damages or limitations on how long an implied warranty lasts,
so the above limitations or exclusions may not apply.

THE FOREGOING LIMITED WARRANTY SHALL BE IN LIEU OF ANY OTHER WARRANTY,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  REPLACEMENT OF
NONCONFORMING GOODS, FOR THE REASONS AND PERIOD DESCRIBED ABOVE, SHALL
CONSTITUTE FULFILLMENT OF ALL LIABILITY OF SELLER TO BUYERS, WHETHER BASED ON
CONTRACT, NEGLIGENCE OR OTHERWISE WITH RESPECT TO OR ARISING OUT OF SUCH
GOODS.

Note:   Some states do not allow the exclusion of implied warranties, so the
above exclusion may not apply to you. This warranty gives you specific legal
rights; you may also have other rights which vary from state to state.