Patton 1205/34 USER MANUAL

USER
MANUAL

MODELS 1205 and
1205/34

Synchronous V.35
Modem Eliminators

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

An ISO-9001

Certified Company

Part #07M1205-D
Doc #049021U
Rev. E
Revised 1/22/08

,

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1205 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 1205 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. If the Model 1205 does cause interference to radio
or television reception, which can be determined by disconnecting the
unit, 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).

1.2 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.

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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 Support: [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 this
product. Technical Service hours: 8AM to 5PM EST, Monday through

Friday.

2.0 GENERAL INFORMATION

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 you have any questions
during installation or use of the Model 1205, contact Patton Electronics
Technical Support at [phone].

2.1 FEATURES

• V.35 (EIA-530) operation

• Synchronous data rates from 32 to 144 Kbps

• Host-to-host distances up to 300 feet

• Constant or RTS controlled carrier selections

• RTS-CTS delay options of 0mS, 7mS or 53mS

• Power derived from V.35 interface

• Internal or external clocking

• All necessary data, clocking and control signals supported

• Made in the U.S.A.

2.2 DESCRIPTION

The Patton Model 1205 synchronous modem eliminator lets

two synchronous hosts communicate with each other in the same room
for a fraction of the cost of a pair of high speed modems. Supporting
synchronous data rates of 32, 48, 56, 64, 72, 112, 128 and 144 Kbps,
the Model 1205 can be configured to emulate dial-up or leased line
service. Maximum distance between the connected hosts is 300 feet.
Timing can be set for internal or external clock, and all necessary data,
clocking and control signals are supported.

The Model 1205 modem eliminator implements the V.35 electrical
interface on dual DB-25 or dual M/34 female connectors, according to
the EIA-530 Standard. Operating power for the Model 1205 is drawn
from the V.35 interfaces, so no AC power or batteries are required.

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3.0 CONFIGURATION

The Model 1205 is equipped with one internal four-position DIP
switch and six internal jumpers that allow configuration to a wide range
of applications. This section describes all possible configuration
settings, including the factory default settings.

3.1 ACCESSING SWITCHES AND JUMPERS

All switches and jumpers are located on the Model 1205 PC board.
To access the PC board, open the Model 1205 case by inserting a
small flat-blade screwdriver in the slot on either side of the case and
twisting gently. As Figure 1 (below) illustrates, the DIP switches are
located on the daughterboard and the jumpers are located on the main
PC board.

3.2 INTERNAL DIP SWITCH

The Model 1205 has one four-position DIP switch mounted on the
internal daughterboard. Figure 2 (below) shows the numbering of the
individual switches and their “ON/OFF” positions relative to the
daughterboard.

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Figure 1. Model 1205 DIP Switch and Jumper Locations on PC Board

Figure 2. Model 1205 DIP Switch Orientation on Internal Daughterboard

Switches

Jumpers

On

On

Off

Port

B

Port

A

Port

B

4
3
2
1

4 2 3 1

JP1

JP2

JP3

S1 through S3: Data Rate Setting

Switches S1 through S3 are set in combination to determine the
synchronous data rate for the Model 1205. Switch S4 is not active.

S1

S2 S3 S4 Setting

Off Off Off N/A 32 kbps

(factory default)

On Off Off N/A 48 kbps
Off On Off N/A 56 kbps
On On Off N/A 64 kbps
Off Off On N/A 72 kbps
On Off On N/A 112 kbps
Off On On N/A 128 kbps
On On On N/A 144 kbps

3.3 INTERNAL JUMPERS

The Model 1205 has three pairs of jumpers (JP1, JP2 and JP3)
mounted on the internal PC board. See Figure 3, below. These
jumpers set clocking, carrier, and RTS/CTS delay independently for
ports A and B.

Figure 4 (following page) presents a detailed view of JP1, JP2 and
JP3, and also shows the factory default setting for each jumper. Please
observe that each pair contains one strap to configure Port A and one
strap to configure Port B. Observe also that each strap has three
possible positions: covering posts 1 & 2, covering posts 2 & 3, or
removed altogether. The detailed description for each pair of jumpers
presents all valid strap position options.

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Figure 3. Model 1205 Jumper Orientation and Factory Default on Internal PC Board.

JP3 JP1

JP2

PORT A

PORT B

PORT B

JP1: RTS/CTS Delay

The setting for jumper JP1 determines the amount of delay
between the time the Model 1205 “sees” RTS and when it sends CTS.
In order to emulate either dial-up or leased line modems, you can set
this strap at either 0 msec, 7 msec or 53 msec. Note: Port A and Port
B must be configured separately. Jumper functions are identical.

JP1

Setting

Position 1&2 7 msec Delay

(factory default)

Position 2&3 53 msec Delay

Strap Removed 0 msec Delay

JP2: Carrier Control

The setting for jumper JP2 determines whether the Model 1205’s
carrier is “constantly on” or “controlled by RTS”. Note: Port A and Port
B must be configured separately. Jumper functions are identical.

JP2

Setting
Position 1&2 Carrier “Controlled by RTS”
Position 2&3 Carrier “Constantly ON”

(factory default)

Strap Removed Not a Valid Setting

JP3: Clock Source

The setting for jumper JP3 determines whether clocking is internal,

external or received loopback. Note

1

: Only port A may be set for

external clock. Note

2

: If Port B is set for receive loopback clock, Port A

must

be set for external clock. Port B may not be set for external clock.

JP3 (Port A)

Setting

Position 1 and 2 Internal Clock

(factory default)

Position 2 and 3 External Clock
Strap Removed Not a Valid Setting

JP3 (Port B)

Setting

Position 1 and 2 Internal Clock

(factory default)

Position 2 and 3 Received Loopback Clock

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Figure 4. Detailed View of Model 1205 Jumpers Showing Factory Default Settings

Port A

Port B

Port B

Port B

Port A

Port A

JP3

JP2JP1

1 2 3

1 2 3

1 2 3

1 2 3

1 2 3

1 2 3

Strap Removed Not a Valid Setting

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150 foot

Cable

150 foot

Cable

Model

1205

Sync. Host A - may supply clock

Sync. Host B - may not

supply clock

Figure 5. Maximum Allowable Cable Distances for the Model 1205

Port A

Port B

4.0 INSTALLATION & OPERATION

Once the Model 1205 is properly configured, installation and

operation are very simple. The Model 1205 draws all necessary
operating power from the V.35 interface, thus no AC power or batteries
are required. There is no power switch. Just like a cable, the unit
should operate transparently when the host devices are turned on and
communicating. Follow these installation and operation instructions.

1. Configure the Model 1205 for your specific application according to

the instructions in Section 3.0 of this manual.

2. Turn off the host (DTE) devices to which the Model 1205 is to be
connected.

3. If one of the host devices has an EIA-530 port, you may plug the
Model 1205 directly into that device. Then connect the Model 1205
to the other host device using a multipair cable* not to exceed 300
feet in length.

4. If neither host device has an EIA-530 port, you will need a multipair
adapter cable* for each end of the Model 1205. The total

cable

length must not exceed 300 feet

. See Figure 5 above.

5. Turn on both host devices. They should communicate normally as
if connected by a simple cable. If they do not communicate
properly, check the configuration of the Model 1205 and each host
device (Who is supplying the clock?, etc.). If problems are still
detected, call Patton Technical Support a: [phone];
http://www.patton.com; or, [e-mail].

*Custom DB-25 to M/34 adapter cables are available from Patton

Electronics at [phone]; http://www.patton.com; or,
[e-mail]. See Appendix B for details.

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APPENDIX A

MODEL 1205 SPECIFICATIONS

Data

Rates: 32, 48, 56, 64, 72, 112, 128 and 144 Kbps

Clocking: Internal, external or receive loopback

Interface: ITU/CCITT V.35/EIA RS-530

Distance: 300 feet (DTE to DTE)

Connectors: DB-25 or M/34 female on both Port A and

Port B

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A- Frame Ground
C- Request to Send
E- Data Set Ready
H- Data Terminal Ready
K­M­P- Transmitted Data (A)
S- Transmitted Data (B)
U- Terminal Timing (A)
W- Terminal Timing (B)
Y- Transmit Timing (A)
AA- Transmit Timing (B)

Signal Ground -B
Clear To Send -D

Data Carrier Detect -F

Receive Data (A) -R
Receive Data (B) -T

Receive Timing (A) -V

Receive Timing (B) - X

CCITT V.35 Interface (M/34 Female)

1 - (FG) Frame Ground
2 - Transmit Data A
3 - Receive Data A
4 - (RTS) Request to Send
5 - (CTS) Clear to Send
6 - (DSR) Data Set Ready
7 - (SG) Signal Ground
8 - (CD) Carrier Detect
9 - Receive Clock B

11 - External Clock B
12 - Transmit Clock B

Data Term. Ready (DTR) - 20

CCITT V.35/EIA-530 INTERFACE (DB-25 Female)

External Clock A - 24

Receive Clock A - 17

Transmit Data B - 14

Receive Data B - 16

Power Supply: Draws interface power from RTS & DTR

signals on both ports.

RTS/CTS Delay: Strap selectable, 0, 7, 53 mS (+/- 15%)

Altitude: 0 to 10,000 feet

Humidity: 5 to 95% noncondensing

Dimensions: Approximately 3” x 2” x .75” (76 x 51 x

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An ISO-9001

Certified Company

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]

Support E-mail: [e-mail]

Phone - Sales [phone]

Phone - Support [phone]

Fax: [phone]

Mail: Patton Electronics Company

7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA

We are committed to a quality product at a quality price. Patton
Electronics is 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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