Patton 1070 User Manual

Dear Valued Customer,

Thank you for purchasing Patton Electronics products! We do

appreciate your business. I trust that you find this user manual helpful.

We manufacture one of the widest selections of data
communications products in the world including CSU/DSU's, network
termination units, powered and self-powered short range modems, fiber optic
modems, interface converters, baluns, electronic data switches, data-line surge
protectors, multiplexers, transceivers, hubs, print servers and much more. We
produce these products at our Gaithersburg, MD, USA, facility, and can
custom manufacture products for your unique needs.

We would like to hear from you. Please contact us in any of the
following ways to tell us how you like this product and how we can meet your
product needs today and in the future.

Web: http://www.patton.com

Sales E-mail: [e-mail]

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Phone - Sales [phone]

Phone - Support [phone]

Fax: [phone]

Mail: Patton Electronics Company

7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA

USER
MANUAL

MODEL 1070

AC Powered, Synchronous
Short Range Modem

We are committed to a quality product at a quality price. Patton
Electronics is BABT and ISO 9001 certified. We meet and exceed the highest
standards in the industry (CE, UL, etc.).

It is our business to serve you. If you are not satisfied with any
aspect of this product or the service provided from Patton Electronics or its
distributors, please let us know.

Thank you.

Burton A.Patton

Vice President

P.S. Please tell us where you purchased this product.
_______________________________________________________________
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CERTIFIED

An ISO-9001

Certified Company

Part #07M1070-C
Doc. #067011UC
Revised 9/12/97

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1070 components to be
free from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of shipment.

This warranty is limited to defects in workmanship or materials, and
does not cover customer damage, abuse or unauthorized modification.
If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings and incidental or
consequential damages arising from the use of or inability to use this
product. Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.

1.1 RADIO AND TV INTERFERENCE

The Model 1070 generates and uses radio frequency energy, and if
not installed and used properly—that is, in strict accordance with the
manufacturer's instructions—may cause interference to radio and
television reception. The Model 1070 has been tested and found to
comply with the limits for a Class A computing device in accordance
with the specifications in Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a
commercial installation. However, there is no guarantee that
interference will not occur in a particular installation. If the Model 1070
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 interface, the user is
encouraged to try to correct the interference by one or more of the
following measures: moving the computing equipment away from the
receiver, re-orienting the receiving antenna and/or plugging the
receiving equipment into a different AC outlet (such that the computing
equipment and receiver are on different branches).

1.3 SERVICE

All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Service at [phone], http://www.patton.com, or

[e-mail].

NOTE: Packages received without an RMA number will not be

accepted.

Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 1070. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

1.2 CE NOTICE

The CE symbol on your Patton Electronics equipment indicates
that it is in compliance with the Electromagnetic Compatibility (EMC)
directive and the Low Voltage Directive (LVD) of the Union European
(EU). A Certificate of Compliance is available by contacting Technical
Support.

1

2

2.0 GENERAL INFORMATION

3.0 CONFIGURATION

Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at [phone].

2.1 FEATURES

• Data rates from 1.2 to 19.2 Kbps, switch selectable

• Built-in optical isolation & high speed surge protection

• Distances up to 10 miles

• Tristate LED indicators

• Point-to-point or multipoint

• Loopback test modes

• Internal or external clocking

• Hardware and software flow control support

• Externally powered

2.2 DESCRIPTION

The Model 1070 Series synchronous short range modem is

equipped with a virtual wish list of “bells and whistles”: Point-to-point or
multipoint applications are supported. Two separate control signals
may be passed (one each way): RTS and DCD. Data lines are
protected from ground loops and electrically volatile environments by
optical isolation and Silicon Avalanche Diodes. System integrity can be
evaluated using two test modes: local analog loopback and remote
analog loopback. Tri-state LEDs monitor transmit data, receive data
and control signals. Finally, 4-wire connections may be made using
either an RJ-11 jack or terminal blocks—both are included.

The Model 1070 uses a set of eight external DIP switches that allow
configuration to a wide range of synchronous applications. Because all
eight switches are in one externally accessible DIP package, there is no
need to open the Model 1070's case for configuration. The switches allow
you to control line contention, clocking methods, RTS/CTS delay and data
rates. Figures 1 and 2 (below) and Table 1 (opposite page) summarize
the switch locations, positions and functions.

FRONT

12345678

ON

REAR

Figure 1. Switch locations underneath Model 1070

ON

ON

In addition, the Model 1070 is perfect for low power RS-232
applications. The new Model 1070 is AC powered and recommended
for low power RS-232 environments. The Model 1070 supports switch
selectable data rates to 19.2 Kbps, and extends RS-232 transmission
distances up to 10 miles over two twisted pair.

The Model 1070 is housed in a sturdy metal case, and comes with
either 115 or 220V external transformers. This is the top-of-the-line in
synchronous short range modems.

3 4

12345678

Figure 2. Close up of 1070 DIP switch package

showing OFF/ON positions relative to switch numbers

OFF

SWITCH SUMMARY TABLE

Position Function Factory Default

Switch 1 Data Rate Off
Switch 2 Data Rate Off
Switch 3 Data Rate On
Switch 4 Not Used N/A
Switch 5 Transmit Clock Off
Switch 6 RTS/CTS Delay On
Switch 7 RTS/CTS Delay Off
Switch 8 Carrier Control Off

Table 1. Summary of switch settings, showing factory defaults

3.1 DETAILED SWITCH SETTINGS

This section provides detailed information about the function of
each DIP switch and lists all possible settings. Use this section as
configuration guide for applications where the Model 1070's default
would not provide correct results.

3.1.1 DATA RATE

Switches 1 thru 3 are set in combination to allow the Model 1070 to
be used at data rates from 1200 bps up to 19,200 bps.

Switch 1 Switch 2 Switch 3 Setting

On On On 1.2 Kbps
Off On On 2.4 Kbps
On Off On 4.8 Kbps
On On Off 7.2 Kbps
Off Off On 9.6 Kbps
Off On Off 14.4 Kbps
On Off Off 19.2 Kbps
Off Off Off 19.2 Kbps

9,600 Bps

}

Internal Clock

8 ms

}

Constant

3.1.2 TRANSMIT CLOCK

Switch 5 is used to specify the clocking method. The Model 1070
can provide an internal clock (Pin 15), or receive an external clock
(from Pin 24).

Switch 5

On = External
Off = Internal

3.1.3 RTS/CTS DELAY

Switches 6 and 7 are used together to specify RTS/CTS delay.
After request to send (RTS) is raised by the host terminal, the Model
1070 raises CTS after a slight delay in order to give the remote terminal
time to receive an incoming signal. Depending on the type of
environment, either a 0 mS, 8 mS or 53 mS delay can be selected.

Switch 6 Switch 7

On On = 0 mS
On Off = 8 mS
Off On = 53 mS

3.1.4 CARRIER ENABLE

Switch 8 is used to specify how the carrier signal is raised. In most
point-to-point full duplex applications, the carrier signal can remain
constantly "high". In a multi-point environment, contention for the line is
"controlled" by RTS.

Switch 8

On = Controlled by RTS
Off = Constant Carrier

Note: Switch 4 is not used.

5

6

4.0 INSTALLATION

The Model 1070 is easy to install. After configuring the DIP
switches and DCE/DTE switches, connect the two twisted pairs using
one of two methods: terminal blocks or RJ-11 jack. Figure 3 (below)
shows the location of the terminal blocks and RJ-11 jack, as well as the
female DB-25 on the rear of the Model 1070.

Powered Async. Short
Range Modem

RX+ RX- GND TX- TX+

RS-232 Interface

Figure 3. Rear view of 1070 showing interface connectors

Made In The USA

LinePower

4.1.2 TWISTED PAIR CONNECTION USING RJ-11

If your two-pair cable is terminated in an RJ-11 plug, you may use
the RJ-11 jack in the back of the Model 1070 to make the connection.
The RJ-11 jack on a Model 1070 series Short Range Modem is
prewired for a standard TELCO wiring environment. To be sure you
have the right wiring, use the diagram below as a guide.

RJ-1

1 SIGNAL

1 GND

†

2 RCV
3 XMT
4 XMT
5 RCV
6 GND

For proper signal crossing between two Model 1070s using RJ-11
connectors, pin-out the twisted pair cable according to the diagram
below. The Model 1070 is not sensitive to polarity, so other
configurations may work.

4.1 TWISTED PAIR WIRING OVERVIEW

These short range modems are designed to work in

pairs

. You will
need one at each end of a 4-wire twisted pair circuit. The pairs must be
"dry" (unconditioned) metallic wire, 19 - 26 AWG. The smaller gauges
limit distance somewhat compared with larger gauges. When you have
completed wiring for your data circuit, the pin connections should be as
shown below:

XMT RCV
XMT RCV
GG

To Shield (Optional)

RCV XMT
RCV XMT

One Pair

}

One Pair

}

4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS

If your two twisted pair line terminates in bare wires, strip the ends
and connect the individual leads to each Model 1070's terminal block.
Be sure the end-to-end connections follow the diagram above.

SIGNAL

†

GND

PIN# COLOR

1 Blue White 6 GND

‡

COLOR PIN# SIGNAL

RCV 2 Yellow Red 4 XMT
XMT 3 Green Black 5 RCV
XMT 4 Red Yellow 2 RCV
RCV 5 Black Green 3 XMT
GND 6 White Blue 1 GND

†

Connection to ground is optional

‡

Standard color codes—yours may be different

1 - Blue
2 - Yellow
3 - Green
4 - Red
5 - Black
6 - White

AT&T standard modular color codes

87

4.2 WIRING FOR MULTIPOINT CIRCUITS

4.2.2 STAR TOPOLOGY

The Model 1070 supports multi-point applications using either a
star or daisy chain topology. Both topologies require special wiring, as
well as specific DIP switch settings for master and slave units.

4.2.1 DAISY CHAIN TOPOLOGY

Using a daisy chain topology, you may connect several Model
1070s together in a master/slave arrangement. Maximum distance
between the units will vary based upon the number of drops, data rate,
wire gauge, etc. Call Patton Technical Support for specific distance
estimates.

Figure 4 (below) shows how to wire the two-pair cables properly for
a Model 1070 daisy chain topology. Note that the ground connection is
not needed.

HOST FIRST SLAVE OTHER SLAVE(S)

XMT RCV RCV
XMT RCV RCV
RCV XMT XMT
RCV XMT XMT

Figure 4. Model 1070 daisy chain wiring

In a multipoint topology, you must configure the CARRIER
ENABLE switch (DIP switch 8) differently for the master Model 1070
than for the slave Model 1070(s). Here are the proper DIP switch
settings for a daisy chain topology:

Number 8

Switch
Master Positions OFF
Slave Positions ON

In a star topology, you may connect several Model 1070s together
in a master/slave arrangement. Maximum distance between the units
will vary based upon the number of drops, data rate, wire gauge, etc.
Call Patton Technical Support for specific distance estimates.

Figure 5 (below) shows how to wire the two-pair cables properly for
a Model 1070 star topology. Note that the ground connection is not
needed.

HOST FIRST SLAVE SECOND SLAVE

XMT RCV

RCV

XMT RCV

RCV

RCV XMT

XMT

RCV XMT

XMT

Figure 5. Model 1070 star wiring

In a multipoint topology, you must configure the CARRIER
ENABLE switch (DIP switch 8) differently for the master Model 1070
than for the slave Model 1070(s). Here are the proper DIP switch
settings for a star topology:

Switch

Number 8
Master Positions OFF
Slave Positions ON

4.2 RS-232 CONNECTION

To connect the Model 1070 to data terminal hardware (PC, host,

terminal, etc.), use a

straight through

Model 1070 to data communications hardware (modem, multiplexer,
etc.), use a

null modem

RS-232 cable.

9 10

RS-232 cable. To connect the

5.0 OPERATION

Once you have properly configured and connected each Model
1070, simply plug in the AC power adapter to get them running; there
is no power switch on the Model 1070. You can monitor the operation
of the Model 1070 using the front panel LED indicators and built-in
loopback test modes.

5.1 LED INDICATORS

5.2.2 REMOTE ANALOG LOOP

The second test mode is Remote Analog Loop. To enter this
mode, set one of the Model 1070s (local) in test mode by depressing
the "Loopback Test" switch. Any characters sent from the remote
Model 1070 will be returned back to the originating device (see Figure

6). If no characters are echoed back, check the wiring between the two
Model 1070s. Be sure to wire the units according to the instructions in
Section 4.0 Installation.

The Model 1070 incorporates six front panel LEDs that show the

status of the modem:

1. The power LED glows when AC power is applied to the modem.

2. The loopback test LED glows when the loopback test switch

has been depressed and is in a test mode.

3. The tri-state TD and RD indicators blink red and green with data
activity. Solid red indicates a low RS-232 logic level, and no color
indicates no activity on the line. Note: RS-232 devices idle in a low
state, so the LED will glow red if the connections are correct and the
RS-232 device is in an idle state.

4. The RTS and CD indicators glow red for a "low" signal and
green for a "high" signal. Note: RTS refers to the signal generated by
the DTE on pin 4. CD refers to the signal generated by the Model 1070
on pin 8. It also indicates that a signal is being received by the remote
modem.

5.2 LOOPBACK TEST MODES

Selected the test modes by depressing the "Loopback Test" switch.
When in loopback mode, the "Loopback Test" LED will glow red. Two
tests are possible using this switch: Local Analog Loop (LAL) and
Remote Analog Loop (RAL).

TD

RD

TD

RD

TX+
TX-

RX­RX+

Local 1070

Local 1070RC

In Normal Mode

In Normal Mode

TX+
TX-

RX­RX+

Local 1070

Local 1070RC

In Loopback Mode

In Loopback Mode

Figure 6. Loopback Test Modes

RX+
RX-

TX­TX+

Remote 1070

Remote 1070RC

In Normal Mode

In Normal Mode

RX+
RX-

TX­TX+

Remote 1070

Remote 1070RC

In Normal Mode

In Normal Mode

RD

TD

RD

TD

5.2.1 LOCAL ANALOG LOOP

The first test mode is Local Analog Loop (V.54 Loop 3). Any data
sent to the local Model 1070 in the this mode will be echoed (returned)
back to the user device. For example, characters typed on the
keyboard of a terminal will appear on the terminal screen (see Figure 6
on the following page).

1211

APPENDIX A

APPENDIX B

PATTON MODEL 1070 SPECIFICATIONS

Transmission Format: Synchronous
Distances: See table (below)
Interface: RS-232 (CCITT V.24) DB-25 female
Transmission Line: 4-wire, unconditioned via RJ-11 or terminal blocks
Data Rates: 1.2, 2.4, 4.8, 7.2, 9.6, 14.4 and 19.2 Kbps
Clocking: Internal or external
Controls: Carrier constantly "ON" or controlled by RTS; RTS/CTS

delay set to 0, 8 or 53 mS

Applications: Point-to-point or multi-point
Indicators: Tri-state indicators for Transmit Data, Receive Data,

Request to Send and Carrier Detect

Diagnostics: Loop 3 and 4, local and remote analog loopback
Optical Isolation: 2500 V RMS (minimum)
Power Supply: Wall-mount, 10 - 12V AC, 200mA
Dimensions: 4.127"W x 1.52"H x 5.0"L

PATTON MODEL 1070 CABLE RECOMMENDATIONS

The Patton Model 1070 is designed and tested to communicate

over twisted-pair cable with the following characteristics:

W

ire Gauge Capacitance Resistance

19 AWG/.9mm 83nF/mi or 15.72 pF/ft. .0163Ω/ft.
22 AWG/.6mm 83nF/mi or 15.72 pF/ft. .0326Ω/ft.
24 AWG/.4mm 83nF/mi or 15.72 pF/ft. .05165Ω/ft.

Using the above characteristics as a baseline, we estimate the

distance limitations for the Model 1070 to be as follows.

Model 1070 Distance Table - Miles (Km)

Data
Rate

19,200 2.5 (4.0) 2.1 (3.4) 1.3 (2.1)

9,600 3.7 (6.0) 2.3 (3.7) 1.7 (2.7)
4,800 4.9 (7.9) 4.9 (7.9) 2.5 (4.0)
2,400 8.2 (13.2) 5.8 (9.3) 4.6 (7.4)
1,200 10.2 (16.4) 8.3 (13.4) 6.8 (10.9)

19 (.9mm) 22 (.6mm) 24 (.4mm)

Wire Gauge

To reduce the potential of difficulties in the field, we recommend that
the cable used to connect the Model 1070s have a capacitance of no
greater than 20pF/ft., and that the wire be no thinner than 26 AWG.
The Model 1070 is designed to withstand normal environmental noise
and conditions. However, other environmental factors too numerous to
discuss may affect proper operation.

The distance table above should

be used as a general guideline only.

13 14

APPENDIX C

APPENDIX D

PATTON MODEL 1070 INTERFACE PIN ASSIGNMENTS

DIRECTION STANDARD "DCE" DIRECTION

1- (FG) Frame Ground
2- (TD) Transmit Data To Model 1070
3- (RD) Receive Data From Model 1070
4- (RTS) Request to Send To Model 1070
5- (CTS) Clear to Send From Model 1070
6- (DSR) Data Set Ready From Model 1070

To Model 1070 Data Term. Ready (DTR) - 20

7- (SG) Signal Ground
8- (DCD) Data Carrier Detect From Model 1070

11- To Model 1070

PATTON MODEL 1070 BLOCK DIAGRAM

15 16

APPENDIX B

TROUBLESHOOTING

APPENDIX B

TROUBLESHOOTING

SYMPTOM PROBLEM SOLUTION

LEDs do not light
when AC power

1. Loose power
connection

1. Make sure the AC
connection is flush

transformer is
plugged into wall

2. Outlet is defective

3. AC power cord is
defective

2. Try a different outlet

3. Remove the cord
from the outlet and
check for continuity

4. The AC transformer
is not plugged into the

4. Have another cup of
coffee!

Model 1070

No data transfer in
either or both
directions

1. Improper twisted
pair wiring

1. Compare your
twisted pair wiring with
the diagram in Section

4.1

2. Improper bit rate
setting

2. Ensure all bit rate
settings on all
connected serial ports
are the same

3. Distance
specifications

3. Check specifications
in Appendix A

exceeded

SYMPTOM PROBLEM SOLUTION

"TD" and "RD" LEDs
indicate activity, but
units will not
communicate or
data is garbled

1. Improper RS-232
wiring

2. Improper twisted
pair wiring

1. Check wiring
between Model 1070
and connected DTE
device—it should be

straight through

2. Compare your
twisted pair wiring with
the diagram in Section

4.1

3. Improper bit rate
setting

3. Make sure the bit
rates on all connected
serial devices are the
same

"TD" and "RD" LEDs
indicate activity, but

1. Defective twisted
pair line

1. Test continuity of

twisted pair line
"CD" LED is unlit or
red (should be
green)

2. Poor twisted pair
connection to Model
1070s

2. Check screw

terminal/RJ-11

connections to Model

1070s; check integrity

of plug RJ-11

terminations
Occasional data

errors

1. Distance/bit rate
capacity exceeded

2. Poor quality twisted
pair circuit

3. Poor twisted pair
connections to Model
1070s

Copyright © 1997

Patton Electronics Company

All Rights Reserved

17 18

1. Check specifications

in Appendix A

2. Use a different

twisted pair circuit

3. Check screw

terminal/RJ-11

connections to Model

1070s; check integrity

of plug RJ-11
terminations