GDI 2070-9D, 2070-9A, 2070-9B, 2070-9E User Manual

2070-9D
2070-9A
2070-9B

2070-9E

USER’S MANUAL

33.6K SMART MODEM

June 11, 2009

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data with all rights and titles reserved by

GDI Communications LLC. By accepting this

document, the recipient assumes custody herof

and agrees not to dislcose this data or any portion

of this data to any unauthorized person without

the prior written consent of GDI Communications

LLC. Recipient further agrees not to incorporate

these drawings, specifications or technical

information, in whole or in part, in any other

THIS LEGEND SHALL BE INCLUDED ON

ANY REPRODUCTION OF THIS DOCUMENT

Proprietary Data

product or endeavor.

GDI COMMUNICATIONS, LLC

280 I-80 West Exit 1
PO BOX 1330
Verdi, Nevada 89439
Phone: [phone]
FAX: [phone]
www.sgdi.com

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TABLE of CONTENTS

GLOSSARY..........................................................................................................................................................1

GERNERAL DESCRIPTION.............................................................................................................................2

GENERAL CHARACTERISTICS.....................................................................................................................3

INDICATORS, CONNECTORS, AND SWITCHES........................................................................................5

Dialup Indicators..........................................................................................................................................5

RJ45 Termination Table ...............................................................................................................................5

DB9 Termination Table................................................................................................................................5

C20 Termination Table.................................................................................................................................5

96 pin edge connector...................................................................................................................................6

INSTALLATION .................................................................................................................................................7

Dialup Configuration Switches.....................................................................................................................7

DISTANCE OR MAXIMUM UNITS PER LINE .............................................................................................9

SYSTEMS WITH NO RTS SIGNAL................................................................................................................9

SYSTEM PROBLEMS..............................................................................ERROR! BOOKMARK NOT DEFINED.

THEORY OF OPERATION.............................................................................................................................12

DIALUP MODEM ...............................................................................................................................................12

FSK OPTION.....................................................................................................................................................13

BLOCK DIAGRAMS ............................................................................................................................................14

Dialup Block Diagram................................................................................................................................14

FSK Expansion Block Diagram..................................................................................................................15

MAINTENANCE...............................................................................................................................................16

PREVENTATIVE MAINTENANCE ........................................................................................................................16

TROUBLE ANALYSIS .........................................................................................................................................16

TROUBLE SHOOTING SEQUENCE CHART............................................................................................................ 16

WAVEFORMS....................................................................................................................................................17

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2070-9x User’s Manual Page 1

GLOSSARY

Anti-Streaming – A function on GDI
modems that prevents a Host from
transmitting continuously.

DCD – Data Carrier Detect. An EIA RS­232D control signal that can be used
to gate RXD to a DTE.

DCE – Data Communications
Equipment. A device that converts
data from a DTE to a transport stream.
For example. The GDI model 400
modem is a DCE that converts RS232
data from a controller to a FSK Telco
system.

DTE – Data Terminal Equipment. A
device that initiates communication
over RS232 lines.

CTS – Clear To Send. A EIA RS-232D
control signal that can be used to gate
TXD data from a DTE.

Full duplex – A communication
system where data can be transmitted
in both directions at the same time.

Half duplex - A communication
system where data can be transmitted
in only one direction at a time.

FSK – Frequency Shift Keying.
Communication protocol where data is
encoded into binary format and
represented by different frequencies.

Host – Any DTE device.

MARK – Signal state of a FSK system
that represents a logical “1” value.

Private wire – Telco communication
hardware that is leased for private
use.

SPACE – Signal state of a FSK system
that represents a logical “0” value

0 dBm – Represents the signal level
required to produce 1mw in a 600Ω
load.
Soft carrier

Surface mount parts – Electronic parts
that are designed to be soldered to
pads instead of vias.

RXD – Receive Data. An EIA RS-232D
data signal that transfers information
in form of binary data to a DTE.

RTS – Request To send. An EIA RS­232D control signal that can be used
to gate TXD to a DTE. The DTE
asserts RTS and then waits for the
DCE to respond with CTS.

TXD Transmit Data. n EIA RS-232D
data signal that transfers information
in form of binary data from a DTE.

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2070-9x User’s Manual Page 2

GERNERAL DESCRIPTION

The 2070-9xx is a 33.6Kbps dial-up
modem in a form factor designed for
use in a Model 2070 Controller.

It is compatible with other V.34
modems and is designed for traffic
control environments.

Located on the front panel of the 2070­9xx is a RS-232 port that can connect
the dialup modem to a computer
through a female DB9 connector. This
port can also be connected to the
2070’s I/O bus.

The phone line connects to the 2070­9xx through a standard RJ-11
connector located on the front panel.
A second RJ-11 connector is provided
for connection to a telephone.

The 2070-9xx can automatically
negotiate line rates from 300bps to
33600 bps.

All operating parameters such as
speed, etc., can be configured using
industry standard AT commands.

The serial port has a maximum speed
of 115.2 Kbps and is RS-232 and V.24
compatible.

The 2070-9xx cannot be used with
leased lines.

The SM336 also features Auto Answer,
Auto Dial, and tone or pulse dialing.

The 2070-9xx can be factory fitted with
a FSK Expansion Card. which is a FSK
Private wire Modem.. FSK stands for
Frequency Shift Keying which is a
modulation scheme that Shifts
(changes) the frequency to represent a
digital “1” (SPACE) or an “O” (Mark).

The FSK option can be configured for
the following baud rates:

2070-9A: 1200bps serial,
1200Hz/2200Hz Mark/Space
Frequencies, and 900Hz Soft Carrier
frequency

2070-9B: 9600bps serial,

11200Hz/17600Hz Mark/Space
Frequencies and 7800Hz Soft Carrier
frequency.

2070-9E: 19200bps serial,

19200Hz/38400Hz Mark/Space
Frequencies and 13800 Soft Carrier
Frequency.

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2070-9x User’s Manual Page 3

GENERAL CHARACTERISTICS

FORM FACTOR

Standard 2070 plug in board size:

8.375” x 5.69” x 1.592”

Temp………..-37 to +74 degrees C.
Humidity…….5 to 95 % non­condensing.
Power …….….5 V @ 500ma
+12V @ 100 ma

-12V @ 100ma

DIALUP:

Modulation……..Quadrature Amp.
Mod.

Modem…ITU V.34 and Rockwell V.FC

Interface…ITU V.24/V.28, EIA-232

Data Throughput…..115.2 Kbps

Data Rates:

33.6Kbps, 31.3Kbps, 28.8Kbps,

26.4Kbps, 24.0Kbps, 21.6Kbps,

19.2Kbps, 16.8Kbps, 14.4Kbps,

12.0Kbps, 9.6Kbps, 7.2Kbps, 4.8Kbps,

2.4Kbps, 1.2K baud, 300 baud.
The modem will automatically select
the best operating speed. Speeds are
±0.01%.

Specifications: V.34, V.32 bis, V.32,
V.22
bis, V.22A/B, V.23, V.21,
Bell 212, Bell 103, V.33,
V.17, V.29, V.27, V.21
Channel 2

Error Correction….V.42 LAPM, MNP2­4,
MNP 10

Data Compression…V.42 bis, MNP 5

Loop Tests….. ITU V.54 loop2
(RDL) and
Loop 3 (LAL)

Data Carrier…….1800 ± 0.5 Hz
Calling Tone……1300 ± 10 Hz
Answering Tone…2100 ± 15 Hz
Receiver Freq. Tolerance…….±14 Hz
S/N Ratio…………..-26 dB
Dynamic Range……-12 dBm to –42
dBm
Transmit Level: Fixed at –11 ±2 dB
Ring detect Sensitivity…. 38 VRMS
Ring Equiv. Number….…1 Bel
Termination………600 Ohm
Return Loss… Better than 14 dB
between
200 and 4000 Hz

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2070-9x User’s Manual Page 4

FSK:

Serial Data Rate……..0-19,200 baud.
Meets EIA RS-232D and CCITT V.24
electrically

CTS Delay .......................12 ±2 ms

Soft Carrier Turnoff Time 10 ±2ms

Receive Squelch ............6.5 ±1ms

Carrier Detect Time........8 ±2ms

Data Format…Asynchronous, serial by
bit

Line interface…..Private Metallic wire
600 Ohm
Modulation…….Phase Coherent FSK.

Modulation Frequencies:
Mark and Space Frequencies have a
±1% tolerance.

Frequency 2070-9A 2070-9B 2070-9E
Mark 1200Hz 11200 Hz 19200 Hz
Space 2200 Hz 17600 Hz 38400 Hz
Soft Carrier 900 Hz 7800 Hz 13800 Hz

4 wire Full Duplex and 2 wire Half
Duplex
Receive Sensitivity….0 to -40 dB.
Output Level……Continuously
adjustable from -8dBm to 0 dBm. (set
to 0dBm)

Anti-streaming
RTS Trigger mode time-out 7s.
Loss of Data mode time out 7s.

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