Patton electronics 1205rc User manual

USER

MANUAL

MODEL 1205RC

Synchronous V.35

Modem Eliminator:

Rack Mount Card

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part# 07M1205RC-C

Doc# 049041U,

Rev. D

Revised 1/22/08

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 communica-

tions 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, multi-

plexers, 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 fol-

lowing 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: [email protected]

Support E-mail: [email protected]

Phone - Sales (301) 975-1000

Phone - Support (301) 975-1007

Fax: (301) 869-9293

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.

_________________________________________________________

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 modifi-

cation. 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 consequen-

tial 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 interfer-

ence 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 fol-

lowing measures: moving the computing equipment away from the

receiver, re-orienting the receiving antenna and/or plugging the receiv-

ing equipment into a different AC outlet (such that the computing equip-

ment 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 exter-

nal outer shield bonded to a metal or metalized connector; and, config-

ure 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.

APPENDIX C

MODEL 1205RC INTERFACE STANDARDS

Patton Electronics Company

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

1.3 SERVICE

All warranty and nonwarranty repairs must be returned freight pre-

paid and insured to Patton Electronics. All returns must have a Return

Materials Authorization number on the outside of the shipping contain-

er. This number may be obtained from Patton Electronics Technical

Support: (301) 975-1007; 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.

APPENDIX B

MODEL 1205RC FACTORY REPLACEMENT PARTS

The Patton Model 1205RC rack system features interchangeable

rear cards, power cords/fuses for international various operating envi-

ronments and other user-replaceable parts. Model numbers, descrip-

tions 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

2.0 GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is warrant-

ed for One Year parts and labor. If any questions during installation or

use of the 1205RC, contact Patton Electronics Technical Support:

(301) 975-1007; http://www.patton.com; or, [email protected].

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 emu-

late 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 support-

ed.

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.

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

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 applica-

tions. 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-config-

uration: 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.

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

5.2 POWER-UP

There is no power switch on the Model 1205RC: Power is auto-

matically 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 pass-

ing data normally, the following LED conditions will exist:

• PWR = green

• TD = blinking red and green

• CD = green

• DTR = green

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 indi-

cate 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 transmis-

sion. 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 transmis-

sion is occurring.

• Two “CD” LEDs monitor the status of each port’s carrier detect sig-

nal. 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).

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

Model 1205RC

Power

DTR

Port

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.

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

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, carri-

er, 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

Figure 4. Jumper locations on Model 1205RC front card

JP2 JP1 JP3

JP6 JP4

JP5

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).

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 metal-

ized backshell.

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

A1 B1

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. Note1: If Port B is set

for receive loopback clock, Port A must be set for external clock.

Note2: 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

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.

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)

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 con-

veniently.

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.

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 set-

ting changes and fuse replacement should only be per-

formed by qualified service personnel. Contact Patton

Electronics Technical support at (301)975-1007,

http://www.patton.com, or [email protected] for more

information.

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)

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 con-

veniently.

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.

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 set-

ting changes and fuse replacement should only be per-

formed by qualified service personnel. Contact Patton

Electronics Technical support at (301)975-1007,

http://www.patton.com, or [email protected] for more

information.

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. Note1: If Port B is set

for receive loopback clock, Port A must be set for external clock.

Note2: 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

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.

The Model 1205RC has six jumpers (JP1,thru JP6) mounted on

the PC board (see Figure 4, below). These jumpers set clocking, carri-

er, 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

Figure 4. Jumper locations on Model 1205RC front card

JP2 JP1 JP3

JP6 JP4

JP5

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).

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 metal-

ized 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 indi-

cate 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 transmis-

sion. 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 transmis-

sion is occurring.

• Two “CD” LEDs monitor the status of each port’s carrier detect sig-

nal. 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).

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

Model 1205RC

Power

DTR

Port

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.

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

Top of Card

Figure 3. Possible function card strap positions

123

Front of Card

123 123

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 applica-

tions. 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-config-

uration: 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.

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

5.2 POWER-UP

There is no power switch on the Model 1205RC: Power is auto-

matically 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 pass-

ing data normally, the following LED conditions will exist:

• PWR = green

• TD = blinking red and green

• CD = green

• DTR = green

2.0 GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is warrant-

ed for One Year parts and labor. If any questions during installation or

use of the 1205RC, contact Patton Electronics Technical Support:

(301) 975-1007; http://www.patton.com; or, [email protected].

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 emu-

late 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 support-

ed.

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.

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

1.3 SERVICE

All warranty and nonwarranty repairs must be returned freight pre-

paid and insured to Patton Electronics. All returns must have a Return

Materials Authorization number on the outside of the shipping contain-

er. This number may be obtained from Patton Electronics Technical

Support: (301) 975-1007; 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.

APPENDIX B

MODEL 1205RC FACTORY REPLACEMENT PARTS

The Patton Model 1205RC rack system features interchangeable

rear cards, power cords/fuses for international various operating envi-

ronments and other user-replaceable parts. Model numbers, descrip-

tions 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