Patton 1205RC USER MANUAL

USER
MANUAL

MODEL 1205RC

Synchronous V.35
Modem Eliminator:
Rack Mount Card

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

An ISO-9001

Certified Company

Part# 07M1205RC-C
Doc# 049041U,
Rev. D
Revised 1/22/08

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1205RC 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 1205RC 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 1205RC 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 1205RC
does cause interference to radio or television reception, which can be
determined by turning the power off or removing the card, 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).In the event the user
detects intermittent or continuous product malfunction due to nearby
high power transmitting radio frequency equipment, the user is strongly
advised to take the following steps: use only data cables with an exter­nal outer shield bonded to a metal or metalized connector; and, config­ure the rear card as shown in section 3.4 of this manual.

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

1.3 SERVICE

All warranty and nonwarranty 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, support@pat-

ton.com. 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 1205RC. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

2

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 any questions during installation or
use of the 1205RC, contact Patton Electronics Technical Support:

[phone]; http://www.patton.com; or, [e-mail].

2.1 FEATURES

• V.35 (EIA-530) operation

• Synchronous data rates from 32 to 144 Kbps

• Host-to-host distances up to 300 feet

• Internal or external clocking

• All necessary data, clocking and control signals supported

• Constant or RTS controlled carrier selections

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

• Front panel LEDs show TD, DTR and CD activity for each port

• Two UD-26 connectors on rear interface card

• Switchable 120V or 240V power supply

• Mounts in Patton’s 16-slot rack chassis and 2/4/8-slot Cluster
Boxes

• Made in the U.S.A.

2.2 DESCRIPTION

The Patton Model 1205RC synchronous modem eliminator

rack card 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 1205RC 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 1205RC is designed to mount in Patton’s 2U high, 16-

slot rack chassis, as well as Patton’s 2/4/8-slot desktop Cluster Boxes.
This rack chassis and cluster boxes feature a switchable 120/240 VAC
power supply (optional 48 VDC) and hot swappable function/interface
cards mounted in a mid-plane architecture. Front panel LEDs show
TD, DTR and CD activity for both ports, as well as power. The rear
interface card has two UD-26 connectors for patching to the host
devices.

3

3.0 CONFIGURATION

This section describes the location and orientation of the Model

1205RC’s configuration switches and jumpers, and provides detailed
instructions for all possible settings.

The Model 1205RC uses a combination of DIP switches and

jumpers that allow configuration to an extremely wide range of applica­tions. Designed around a mid-plane architecture, the Model 1205RC
incorporates both front and rear cards. Configuration of both may be
necessary. The switches/jumpers are accessible when the cards are
slid out of the rack chassis. Once configured, the Model 1205RC is
designed to operate transparently, without need for frequent re-config­uration: just set it and forget it!

3.1 FUNCTION CARD CONFIGURATION

All switches and jumpers are located on the Model 1205RC’s PC

board. To access the PC board, loosen the two thumb screws on the
front panel and slide the card out of the chassis. As Figure 1 (below)
illustrates, the DIP switches are located on the “daughterboard” and
the jumpers are located on the main PC board.

3.1.1 FUNCTION CARD DIP SWITCH

The Model 1205RC has one four-position DIP switch mounted on

the daughterboard. Figure 2 (following page) shows the numbering of
the individual switches and their “ON/OFF” positions relative to the
daughterboard.

4

Figure 1. Model 1205RC board, showing location of switches/jumper

S1 through S3: Data Rate Setting

Switches S1 through S3 are set in combination to determine the

synchronous data rate for the Model 1205RC. Switch S4 is not active.

S1

S2 S3 S4 Setting
Off Off Off N/A 32 kbps
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 FUNCTION CARD JUMPERS

The Model 1205RC has two ports (Port A and Port B), and each
must be configured independently. Therefore, every function (such as
clocking) has two

jumpers associated with it. As Figure 3 (below)
shows, each jumper has three possible positions: strap covering posts
1 & 2, strap covering posts 2 & 3, or strap removed altogether. The
detailed description for each jumper presents all valid strap positions.

5

Figure 2. Model 1205RC DIP switch orientation on internal daughterboard.

On

4
3
2
1

Top of Card

Figure 3. Possible function card strap positions

123

Front of Card

123

123

The Model 1205RC has six jumpers (JP1,thru JP6) mounted on
the PC board (see Figure 4, below). These jumpers set clocking, carri­er, and RTS/CTS delay independently for ports A and B.

JP1: RTS/CTS Delay (Port A)

The setting for jumper JP1 determines–with respect to Port A– the
amount of delay between the time the Model 1205RC “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.

JP1

Setting
Position 1&2 7 msec Delay (factory default)
Position 2&3 53 msec Delay
Strap Removed 0 msec Delay

JP6: RTS/CTS Delay (Port B)

The setting for jumper JP6 determines–with respect to Port B– the
amount of delay between the time the Model 1205RC “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.

JP6

Setting
Position 1&2 7 msec Delay (factory default)
Position 2&3 53 msec Delay
Strap Removed 0 msec Delay

6

Figure 4. Jumper locations on Model 1205RC front card

JP2

JP1

JP3

JP6

JP4

JP5

JP2: Carrier Control (Port A)

The setting for jumper JP2 determines–with respect to Port A–

whether the Model 1205RC’s carrier is “constantly on” or “controlled
by RTS”.

JP2

Setting
Position 1&2 Carrier “Constantly ON” (factory default)
Position 2&3 Carrier “Controlled by RTS”
Strap Removed Not a valid setting

JP3: Carrier Control (Port B)

The setting for jumper JP3 determines–with respect to Port B–

whether the Model 1205RC’s carrier is “constantly on” or “controlled
by RTS”.

JP3

Setting
Position 1&2 Carrier “Controlled by RTS”
Position 2&3 Carrier “Constantly ON” (factory default)
Strap Removed Not a valid setting

JP5: Clock Source (Port A)

The setting for jumper JP5 determines–with respect to Port A–

whether clocking is internal or external. Note: Only

Port A may be set

for external clock.

JP5 (Port

A) Setting
Position 1&2 External Clock
Position 2&3 Internal Clock (factory default)
Strap Removed Not a valid setting

JP4: Clock Source (Port B)

The setting for jumper JP4 determines–with respect to Port B–

whether clocking is internal or receive loopback. Note

1

: If Port B is set

for receive loopback clock, Port A must

be set for external clock.

Note

2

: Port B may not be set for external clock.

JP4 (Port B)

Setting
Position 1&2 Receive Loopback Clock
Position 2&3 Internal Clock (factory default)
Strap Removed Not a valid setting

7

3.4 REAR CARD CONFIGURATION

The rear interface card for the Model 1205RC is equipped with two
female UD-26 connectors: one for each DTE host port. This card has
one configuration jumper (JB4). Figure 5 (below) shows the location of
this jumper on the PC board.

SGND & FRGND (JB4)

In the connected position, this jumper links UD-26 pin 7 (Signal
Ground) and frame ground. In the open position, pin 1 is “lifted” from
frame ground.

JB4

Position 1&2 = SGND (UD-26 pin 7)

and FRGND Connected

Position 2&3 = SGND (UD-26 pin 7)

and FRGND Not Connected

Figure 5. Rear card jumper location

JB4

(peg 1 toward

bottom of card,

peg 3 toward top

of card)

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4.0 INSTALLATION

This section describes the functions of the Model 1000R16 rack
chassis, tells how to install front and rear Model 1205RC cards into the
chassis, and provides diagrams for wiring the interface connections
correctly.

4.1 THE MODEL 1000R16 RACK CHASSIS

The Model 1000R16 Rack Chassis (Figure 6) has sixteen card
slots, plus its own power supply. Measuring only 3.5” high, the Model
1000R16 is designed to occupy only 2U in a 19” rack. Sturdy front
handles allow the Model 1000R16 to be extracted and transported con­veniently.

4.1.1 THE RACK POWER SUPPLY

The power supply included in the Model 1000R16 rack uses the
same mid-plane architecture as the modem cards. The front card of
the power supply slides in from the front, and the rear card slides in
from the rear. They plug into one another in the middle of the rack.
The front card is then secured by thumb screws and the rear card by
conventional metal screws.

9

Figure 6. Model 1000R16 Rack Chassis with power supply

WARNING! There are no user-serviceable parts in the

power supply section of the Model 1205RC. Voltage set­ting changes and fuse replacement should only be per­formed by qualified service personnel. Contact Patton
Electronics Technical support at [phone],
http://www.patton.com, or [e-mail] for more
information.

Switching the Power Supply On and Off

The power supply on/off switch is located on the front panel.
When plugged in and switched on, a red front panel LED will glow.
Since the Model 1000R16 is a “hot swappable” rack, it is not necessary
for any cards to be installed before switching on the power supply.
The power supply may be switched off at any time without harming the
installed cards.

NOTE: Please refer to the Model 1000RP Series User Manual AC
and DC Rack Mount Power Supplies for fuse and power card

replacement information.

4.2 INSTALLING THE MODEL 1205RC INTO THE CHASSIS

The Model 1205RC is comprised of a front card and a rear card.
The two cards meet inside the rack chassis and plug into each other by
way of mating 50 pin card edge connectors. Use the following steps
as a guideline for installing each Model 1205RC into the rack chassis:

1. Slide the rear card into the back of the chassis along the
metal rails provided.

2. Secure the rear card using the metal screws provided.

3. Slide the card into the front of the chassis. It should meet the
rear card when it’s almost all the way into the chassis.

4. Push the front card gently into the card-edge receptacle of the
rear card. It should “click” into place.

5. Secure the front card using the thumb screws.

NOTE: Since the Model 1000R16 chassis allows “hot swapping”
of cards, it is not necessary to power down the rack when you
install or remove a Model 1205RC.

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4.3 HOST (DTE) CONNECTION

The Model 1205RC rear card has two UD-26 connectors, labeled
“A1” and “B1” (see figure 7, below). These correspond to host (DTE)
connection Port A and Port B, as discussed in Section 3.0.

To connect V.35 host (DTE) devices A and B to the Model
1205RC, follow these instructions:

1. Configure the Model 1205RC for your specific application accord-

ing to the instructions in Section 3.0 of this manual.

2. Connect host devices A and B to the Model 1205RC using multi-

pair adapter cables (see Appendix B for a list of custom adapter

cables available from Patton Electronics). Observe the following

conditions when making connections :

a) Each multipair cable must not exceed 150 feet in length

(see Figure 8, below).

b) If external clock is used, the host (DTE) device supplying the

clock must

be connected to Port A. The Model 1205RC

cannot

receive an external clock on Port B (see Section 3.0

for configuration details).

c) If receive clock is used on Port B, Port A must

supply an

external clock (see Section 3.0 for configuration details).

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Notice! Any terminal cable connected to the Model

1205RC must be shielded cable, and the outer shield must
be 360 degree bonded–at both ends–to a metal or metal­ized backshell.

Figure 7. Model 1205RC rear interface card, showing connectors

A1 B1

5.0 OPERATION

Once you have configured the Model 1205RC and connected the
cables to host A and host B, you are ready to operate the unit. This
section describes the LED status monitors and power-up procedure.

5.1 LED STATUS MONITORS

The Model 1205RC features 13 front panel status LEDs that indi­cate the condition of the Model 1205RC and the two ports, A & B (see
Figure 9, above):

• The green “PWR” LED glows green when power is applied to the
Model 1205RC through its mid-plane chassis connection.

• Two “TD” LEDs monitor the status of each port’s data transmis­sion. The red LED glows when the signal is in an idle (negative)
state. The green LED glows when the signal is in a transmitting
(positive) state. Both LEDs will normally blink when data transmis­sion is occurring.

• Two “CD” LEDs monitor the status of each port’s carrier detect sig­nal. The red LED glows when the receive channel is not active
(negative condition). The green LED glows when the receive
channel is active (positive condition).

• Two “DTR” LEDs monitor the status of DTR for each port. The red
LED glows to indicate that the host device connected to that port
is not ready to communicate (negative condition). The green LED
glows to indicate that the host device connected to that port is
ready to communicate (positive condition).

12

Figure 9. Model 1205RC front panel, showing LED indicators.

Model 1205RC

Power

TD

Port

CD

A

DTR

TD

Port

CD

B

DTR

5.2 POWER-UP

There is no power switch on the Model 1205RC: Power is auto­matically applied to the 1205RC when its card-edge connector makes
contact with the chassis’ mid-plane socket, or when the chassis’ power
supply is turned on. Note: The 1205RC is a “hot swappable” card—it

will not be damaged by plugging it in or removing it while the rack is
powered up.

When the Model 1205RC is powered up, and both ports are pass­ing data normally, the following LED conditions will exist:

• PWR = green

• TD = blinking red and green

• CD = green

• DTR = green

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APPENDIX A

MODEL 1205RC SPECIFICATIONS

Transmission Format: Synchronous, CCITT V.35

Internal Interface: Connection to Model 1000R16 rack

chassis via male card edge

External Interface: UD-26 female, ports A1 and B1

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

Clocking: Internal, external or receive loopback

Distance: 300 feet (DTE to DTE)

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

Indicators: Independent Bi-color LED indicators for

each port: TD, CD and DTR; common
“Power” indicator

Temperature: 0-50°C / 32-122°F

Humidity: 5 to 95%, noncondensing

Dimensions: 0.95”w x 3.1”h x 5.4”l

14

APPENDIX B

MODEL 1205RC FACTORY REPLACEMENT PARTS

The Patton Model 1205RC rack system features interchangeable
rear cards, power cords/fuses for international various operating envi­ronments and other user-replaceable parts. Model numbers, descrip­tions and prices for these parts are listed below:

Patton Model #

Description

1000RPEM..........................120/240V Rear Power Entry Module

1000RPSM-2.......................120/240V Front Power Supply Module

1000RPEM-DC ...................DC Rear Power Entry Module

1000RPSM-48A ..................48V Front Power Supply Module

1000RPEM-V ......................120/240V CE Compliant Rear Power

Entry Module

1000RPSM-V ......................120/240V CE Compliant Front Power

Supply Module

0805US ...............................American Power Cord

0805EUR.............................European Power Cord CEE 7

0805UK ...............................United Kingdom Power Cord

0805AUS.............................Australia/New Zealand Power Cord

0805DEN.............................Denmark Power Cord

0805FR ...............................France/Belgium Power Cord

0805IN.................................India Power Cord

0805IS.................................Israel Power Cord

0805JAP..............................Japan Power Cord

0805SW ..............................Switzerland Power Cord

0516FPB1 ...........................Single Width Blank Front Panel

0516FPB4 ...........................4-Wide Blank Front Panel

0516RPB1...........................Single Width Blank Rear Panel

0516RPB4...........................4-Wide Blank Rear Panel

056S1..................................Set of 16 #4 pan head screws/washers

1205-26M/35M....................cable, 6ft, UD-26 male to M/34 male

1205-26M/35F.....................cable, 6ft, UD-26 male to M/34 female

1205-26M/25M....................cable, 6ft, UD-26 male to DB-25 male

1205-26M/25F.....................cable, 6ft, UD-26 male to DB-25 female

15

APPENDIX C

MODEL 1205RC INTERFACE STANDARDS

© Copyright

Patton Electronics Company

All Rights Reserved

16

13- Not Used
12- (TC/) Transmit Clock
11- (XTC/) Network Clock
10- Not Used
9- (RC/) Receive Clock
8- (CD) Carrier Detect
7- (SG) Signal Ground
6- (DSR) Data Set Ready
5- (CTS) Clear to Send
4- (RTS) Request to Send
3- (RD) Receive Data
2- (TD) Transmit Data
1- (FG) Frame Ground

MODEL 1205RC V.35 INTERFACE (DCE WIRING)

Not Used -26
Not Used -25

Network Clock (XTC) -24

Not Used -23
Not Used -22
Not Used -21

Data Term Ready (DTR) -20

Not Used -19

Not Used -18
Receive Clock (RC) -17
Receive Data (RD/) -16

Transmit Clock (TC) -15

Transmit Data (TD/) -14

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

Executive Vice President

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

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