Patton electronics 1080A Manual de usuario

USER

MANUAL

MODEL 1080A and

MODEL 1080A-64

Universal Synchronous &

Asynchronous

Short Range Modems

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part #07M1080A-D

Doc. #072041UD

Revised 6/19/98

CERTIFIED

An ISO-9001

Certified Company

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 1080A Series 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 1080A Series 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 1080A Series

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 1080A Series 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).

1.2 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 Patton

Technical Support.

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:

tel: (301) 975-1007;

email: [email protected]; or,

www: http://www.patton.com.

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 1080A Series. 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 by Patton's qualified

technicians. If any questions or problems arise during installation or

use of this product, please do not hesitate to contact Patton Electronics

Technical Support at (301) 975-1007.

2.1 FEATURES

• Synchronous or asynchronous operation

• Model 1080A supports data rates up to 57.6 kbps

• Model 1080A-64 supports data rates up to 64 kbps

• Two-wire/half duplex or four-wire/full or half duplex

• V.52 & V.54 test modes

• Automatic equalization & gain control

• Anti-streaming timer

• Distances up to 20 miles (32 km)

• Point-to-point or multipoint

• Internal, external or received loopback clocking

• Hardware and software flow control support

• Built-in transformer isolation & high speed surge protection

• External AC power

• Bi-color LED indicators

• Detects broken or inferior cable by lighting error LED

2.2 DESCRIPTION

The Model 1080A Series Universal Short Range Modem

operates 2-wire (half duplex) or 4-wire (full or half duplex), in

synchronous or asynchronous modes, over unconditioned telephone

lines. The Model 1080A supports bit rates up to 57.6 kbps. The Model

1080A-64 supports rates up to 64 kbps. Both operate in synchronous

mode between the local and remote modems; when connected to an

asynchronous RS-232 device, the Model 1080A Series SRM converts

the asynchronous data to synchronous data.

The Model 1080A Series has several features to enhance overall

performance: automatic equalization, automatic gain control, anti-

streaming timer, transformer isolation to guard against data loss due to

ground potential differences, and Silicon Avalanche Diode surge

protection to guard against data line transients.

The Model 1080A Series features V.52 compliant bit error rate

pattern tests and two V.54 test modes: local analog loopback and

remote digital loopback. The operator at the local end may test both

local and remote modems, plus the line, in the digital loopback mode.

Both RDL and LAL modes can be controlled by a manual switch or via

the V.24/RS-232 interface.

3.0 CONFIGURATION OVERVIEW

The Model 1080A Series is fairly simple to install and is ruggedly

designed for excellent reliability: just set it and forget it. The following

instructions will help you set up and install the Model 1080A or 1080A-

64 properly.

3.1 CONFIGURATION SWITCHES

The Model 1080A Series uses a unique set of 24 external mini DIP

switches that allow configuration to an extremely wide range of

applications. These 24 DIP switches are grouped into three eight-

switch sets, and are externally accessible from the underside of the unit

(see Figure 1). Since all configuration DIP switches are externally

accessible, there is no need to open the case for configuration.

The configuration switches allow you to select data rates, clocking

methods, V.52 & V.54 tests, word lengths, extended signaling rates,

async. or sync. mode, 2- or 4-wire operation, anti-stream control and

input impedance. The drawings, text and tables on the following pages

describe all switch locations, positions and functions.

12345678

FRONT

REAR

Figure 1. Underside of Model 1080A Series, showing location of DIP switches

OFF

Each Model 1080A Series SRM has three sets of eight switches,

yielding 24 total DIP switches. The three sets will be referred to as S1,

S2 and S3. As Figure 2 shows, the orientation of all DIP switches is the

same with respect to “ON” and “OFF” positions.

3.2 CONFIGURATION SWITCH SET “S1”

The DIP switches on S1 set data rate, clock source, async./sync.

mode and carrier control method. The default settings are summarized

in the table below.

Switches S1-1 through S1-4: Data Rate Setting

Switches S1-1 through S1-4 are set in combination to determine

the asynchronous and synchronous data rate for the Model 1080A and

1080A-64.

MODEL 1080A S1 SUMMARY TABLE

Position Function Factory Default

S1-1 Data Rate On

S1-2 Data Rate Off

S1-3 Data Rate Off

S1-4 Data Rate On

S1-5 Clock Source On

S1-6 Clock Source On

S1-7 Async./Sync. On Async.

S1-8 Carrier Control Off Constantly On

9,600 bps

(1080A)

16,000 bps

(1080A-64)

Internal

}

Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions

12345678

OFF

Shown in the tables below are DIP Switch settings for Models

1080A and 1080A-64.

Switches S1-5 and S1-6: Clock Source

Switches S1-5 and S1-6 are set in combination to determine the

transmit clock source for the Model 1080A Series.

S1-5 S1-6 Setting

On On Internal transmit clock

Off On Receive recover clock

On Off External transmit clock

Switch S1-7: Asynchronous/Synchronous Mode

The setting for switch S1-7 determines whether the Model 1080A

Series is in asynchronous or synchronous operating mode.

S1-7 Setting

On Asynchronous

Off Synchronous 6

S1-1 S1-2 S1-3 S1-4 Setting

Off On Off On 16 kbps

Off Off Off On 32 kbps

Off On On Off 64 kbps

DATA RATE SETTINGS - MODEL 1080A-64

S1-1 S1-2 S1-3 S1-4 Setting

On On On On 1.2 kbps

Off On On On 1.8 kbps

On Off On On 2.4 kbps

Off Off On On 3.6 kbps

On On Off On 4.8 kbps

Off On Off On 7.2 kbps

On Off Off On 9.6 kbps

Off Off Off On 14.4 kbps

On On On Off 19.2 kbps

Off On On Off 28.8 kbps

On On Off Off 38.4 kbps

Off On Off Off 57.6 kbps

MODEL 1080A DATA RATE SETTINGS

Switch S1-8: Carrier Control Method

The setting for switch S1-8 determines whether the carrier is

“constantly on” or “controlled by RTS”. This setting allows for operation

in switched carrier, multipoint and/or hardware handshaking

applications.

S1-8 Setting

Off Constantly on

On Controlled by RTS

3.3 CONFIGURATION SWITCH SET “S2”

The DIP switches on S2 set word length, extended signaling rate,

RTS/CTS delay, V.52 and V.54 diagnostic test and 2- and 4-wire

operation.

Switches S2-1 and S2-2: Word Length

Switches S2-1 and S2-2 are set in combination to determine the

word length for asynchronous data.

S2-1 S2-2 Setting

Off On 8 bits

On On 9 bits

Off Off 10 bits

On Off 11 bits

S2 SUMMARY TABLE

Position Function Factory Default

S2-1 Word Length Off

S2-2 Word Length Off

S2-3

Extended Signaling Rate

Off -2.5% to 1%

S2-4 RTS/CTS Delay On

S2-5 RTS/CTS Delay On

S2-6 V.52/V.54 Tests Off

Normal Operation

S2-7 2-Wire/4-Wire Off (4-Wire)

S2-8 Not Used N/A

}

7 ms

10 bits

Switch S2-3: Extended Signaling Rate

The setting for switch S2-3 determines the range of variability the

Model 1080A Series “looks for” in asynchronous data rates (i.e., the

actual variance from a given frequency level the Model 1080A Series

will tolerate).

S2-3 Setting

Off -2.5% to +1%

On -2.5% to +2.3%

Switches S2-4 and S2-5: RTS/CTS Delay

The combined settings for switches S2-4 and S2-5 determine the

amount of delay between the time the unit “sees” RTS and when it

sends CTS. Options are no delay, 7 ms and 53 ms.

S2-4 S2-5 Setting

On On 7 ms

Off On 53 ms

On Off No delay

Off Off No delay

Switch S2-6: V.54 Loopback Test Enable

To reset the V.54 circuit, set switch S2-6 to the “ON” position, then

back to the “OFF” position.

S2-6 Setting

Off V.54 Normal Operation

On V.54 Testing Disabled

Switch S2-7: 2-Wire/4-Wire Mode Selection

The setting for switch S2-7 determines whether the Model 1080A

Series is operating in 2-wire or 4-wire mode.

S2-7 Setting

Off 4-wire (full or half duplex)

On 2-wire (half duplex only)

3.4 CONFIGURATION SWITCH SET “S3”

The DIP switches on S3 set the anti-stream control, local loopback

enable, remote loopback enable and receive (input) impedance levels

for the Model 1080A Series. Factory default positions of Switch S3 are

shown in the table below.

Switches S3-1 & S3-2: Input Impedance

The setting for Switches S3-1 and S3-2 determines the 1080A

Series’ input impedance. This allows you to choose the optimum

impedance setting for your application. In long distance applications

the impedance of the cable must match the impedance of the load (or

resistor) of the Model 1080A Series unit. Thicker gauge cables

requires a lower Ohm setting, while a thinner gauge cable should

receive a higher Ohm setting. If you are using higher speeds you will

need a lower Ohm setting, and a higher Ohm setting for the slower

speeds. Refer to the table on the following page for assistance in

selecting a setting.

S3-1 S3-2 Setting

On On 130 Ohms

On Off 200 Ohms

Off On 320 Ohms

Off Off High impedance (minimum 2kΩ)

S3 SUMMARY TABLE

Position Function Factory Default

S3-1 Input Impedance On

S3-2 Input Impedance Off

S3-3 Not yet assigned n/a

S3-4 Mode Selection On Point to Point

S3-5 Local Loopback Off Disabled

S3-6 Remote Loopback Off Disabled

S3-7 Anti-stream Control Off

S3-8 Anti-stream Control Off

200 Ohms

Disabled

}

Switch S3-4: Mode Selection

The setting for switch S3-4 allows the user to choose the

appropriate setting for point-to-point or multipoint applications.

S3-4 Setting

On Point-to-point

On Multipoint application as “Master”

Off Multipoint application as “Slave”

Switch S3-5: RS-232 Initiation of Local Loopback Test

The setting for switch S3-5 determines whether or not the Model

1080A Series’ local analog loopback test can be initiated by raising pin

18 on the RS-232 interface.

S3-5 Setting

On RS-232 initiation enabled

Off RS-232 initiation disabled

S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A

Gauge of

Cable

19AWG/.9mm

22AWG/.6mm

24AWG/.5mm

26AWG/.4mm

1.2

320

Data Rates, kb/s

1.8

320

2.4

200

320

3.6

200

320

4.8

200

320

7.2

200

9.6

200

14.4

130

200

19.2

130

200

28.8

130

200

38.4

130

57.6

130

S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A-64

Gauge of

Cable

19AWG/.9mm

22AWG/.6mm

24AWG/.5mm

26AWG/.4mm

130

200

Data Rates, kb/s

130

200

130

Switch S3-6: RS-232 Initiation of Remote Loopback Test

The setting for switch S3-6 determines whether or not the Model

1080A Series’ remote digital loopback test can be initiated by raising

pin 21 on the RS-232 interface.

S3-6 Setting

On RS-232 initiation enabled

Off RS-232 initiation disabled

Switches S3-7 and S3-8: Anti-stream Control

Switches S3-7 and S3-8 are set in combination to determine the

time out period for the Model 1080A Series’ anti-stream control timer.

S3-7 S3-8 Setting

Off Off Disabled

Off On 12.5 seconds

On Off 50.0 seconds

On On 12.5 seconds

4.0 INSTALLATION

The Model 1080A Series operates in four twisted pair topologies:

2-wire/point-to-point, 2-wire/multipoint, 4-wire/point-to-point, and

4-wire/multipoint. In each of these topologies, the twisted pair wire

must be 19 - 26 AWG "dry", unconditioned metallic wire (see Appendix

C for wire recommendations). Dial-up analog circuits, such as those

used with a standard Hayes-type modem, are not acceptable. The

twisted pair may be shielded or unshielded. Both types yield favorable

results.

The Model 1080A Series offers two methods of twisted pair

connection: RJ-45 jack and terminal blocks. Figure 3 (below) shows

the location of these interfaces on the rear panel of the Model 1080A

Series. Connect the wire to each Model 1080A Series as described in

the instructions that follow the illustration. The “+” and “-” indicators are

for reference only. The Model 1080A Series is not sensitive to polarity.

4.1 TWO-WIRE INSTALLATION

When communicating over a single twisted pair circuit, the Model

1080A Series operates half duplex: that is, it transmits in only one

direction at a time. This method of operation is effective for both point-

to-point and multipoint applications.

In single pair point-to-point applications, you will need a pair of

Model 1080A or 1080A-64s for each circuit—one at each end of the

single pair wire. In single-pair multipoint applications you will need

three or more Model 1080A Series units. These can be connected

using a star topology, although a daisy chain topology is usually used.

Figure 3. Rear view of Model 1080A Series

RS-232 Interface (Female)

Made In the USA

LinePower

Powered Short Range

Modem

RX+ RX- GND TX- TX+

4.1.1 Two-Wire Cable Connection Via RJ-45

A. The RJ-45 jack on a Model 1080A Series Short Range Modem is

prewired for a standard TELCO wiring environment. To be sure you

have the right wiring, use the table below as a guide.

RJ-45 SIGNAL

1 -------------NC

2 -------------GND†

3 -------------RCV

4 -------------XMT

5 -------------XMT

6 -------------RCV

7 -------------GND

8 -------------NC

†Connection to ground is optional

B. Proper wiring of pairs between the two modems is as follows:

SIGNAL PIN# COLOR* COLOR PIN# SIGNAL

XMT 4 Green ------------Green 4 XMT

XMT 5 Red---------------Red 5 XMT

*Standard color codes—yours may be different

C. AT&T standard modular color codes:

1 - Blue

2 - Orange

3 - Black

4 - Red

5 - Green

6 - Yellow

7 - Brown

8 - Slate

4.1.2 Two-Wire Cable Connection Via Terminal Blocks

If you are not going to use the modular jacks, follow the

instructions below.

A. Locate the terminal block on the back of the unit. It should

look like the following diagram:

NOTE: * The “+” and “-” indicators are for reference only. The Model 1080A Series is

not sensitive to polarity.

B. Connect one wire of the pair to a Transmit lug (TX+ or TX-) on

both the local and remote Model 1080A or 1080A-64.

C. Connect the other wire of the pair to the other Transmit lug on

both the local and remote Model 1080A or 1080A/64.

D. If there is a shield around the telephone cable, it may be

connected to GND on the terminal block. We recommend connecting

the shield at the computer end only to avoid ground loops. A ground

wire is not necessary for proper operation of these units.

E. When you finish connecting the telephone line to units at both

ends, it should look like the following diagram:

4.2 FOUR-WIRE INSTALLATION

When communicating over a two twisted pair circuit, the Model

Series can operate full or half duplex, point-to-point or multipoint. In

two pair point-to-point applications, you will need a

pair

of Model

1080As or 1080A-64s for each circuit—one at

each end

of the single

pair wire. In two pair multipoint applications you will need three or more

Model 1080A Series units.. These can be connected using a star

topology, although a daisy chain topology is usually used.

RX+ RX- GND TX- TX+

XMT XMT

GND GND

To Shield (Optional) }One Pair

4.2.1 Four-Wire Cable Connection Via RJ-45

A. The RJ-45 jack on a Model 1080A/1080A-64 Short Range

Modem is prewired for a standard TELCO wiring environment. To be

sure you have the right wiring, use the table below as a guide.

RJ-45 SIGNAL

1 -------------NC

2 -------------GND†

3 -------------RCV

4 -------------XMT

5 -------------XMT

6 -------------RCV

7 -------------GND

8 -------------NC

B. Proper crossing of pairs between the two modems is as follows:

†Connection to ground is optional

SIGNAL PIN# COLOR* COLOR PIN# SIGNAL

GND†2 Orange ----------Brown 7 GND

RCV 3 Black -------------Green 5 XMT

XMT 4 Red---------------Yellow 6 RCV

XMT 5 Green ------------Black 3 RCV

RCV 6 Yellow------------Red 4 XMT

GND 7 Brown------------Orange 2 GND

*Standard color codes—yours may be different

†Connection to ground is optional

C. AT&T standard modular color codes:

1 - Blue

2 - Orange

3 - Black

4 - Red

5 - Green

6 - Yellow

7 - Brown

8 - Slate

4.2.2 Four-Wire Cable Connection Via Terminal Blocks

If you are not going to use the modular jacks then follow the

instructions below.

A. Locate the terminal block on the back of the unit. It should

look like the following diagram:

* The “+” and “-” indicators are for reference only. The Model 1080A Series is

not sensitive to polarity.

B. Connect one pair of wires in the telephone cable to the

Transmit lugs (TX+ and TX-) on the terminal block.

C. Connect the other pair of wires in the telephone cable to the

Receive lugs (RX+ and RX-) on the terminal block.

D. If there is a shield around the telephone cable, it may be

connected to "G" on the terminal block. We recommend connecting the

shield at the computer end only to avoid ground loops. A ground wire is

not necessary for proper operation of these units.

E. When you finish connecting the telephone line to units at both

ends, it should look like the following diagram:

XMT RCV

RCV XMT

To Shield (Optional) }One Pair

}One Pair

RX+ RX- GND TX- TX+

4.3 FOUR-WIRE, MULTIPOINT INSTALLATION

Multipoint operation involves the connection of several terminals to

one host port. In such an application, one local Model 1080A/1080A-64

is used as a master unit, and it is connected to several remote Model

1080A/1080A-64s that are acting as slaves. Up to 25 Model 1080A

Series slaves may be connected to one host Model 1080A Series

master SRM, provided that the computing hardware and software

support that many terminal drops.

In a multipoint environment the master Model 1080A or 1080A-64

transmits continually. Initiation of two-way communication is carrier-

controlled by each “slave” Model 1080A Series unit. To facilitate

multipoint communication, the master Model 1080A-64 should have its

carrier control DIP switch set to “constantly ON” (S1-8=OFF). Each

slave Model 1080A Series unit should have its carrier control DIP

switch set to “controlled by RTS” (S1-8=ON). Figure 4 illustrates a

typical Model 1080A Series multipoint application.

4.3.1 Multipoint Twisted Pair Connection

The Model 1080A Series supports multipoint applications using a

star topology. 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. Figures 11 and 12

show how to wire the one-pair and two-pair cables properly for a Model

star topology. Note that the ground connection is not needed.

Figure 4. Typical multipoint set-up

4.4 RS-232 CONNECTION

Connect the synchronous or asynchronous output of your RS-232

device to the DB-25 interface on the rear panel of the Model 1080A

Series. Note: The Model 1080A Series is wired to connect to a DTE.

If your RS-232 output device is DCE, call Patton Technical Support at:

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

for specific installation instructions.

HOST FIRST SLAVE SECOND SLAVE

XMT RCV RCV

RCV XMT XMT

HOST FIRST SLAVE SECOND SLAVE

XMT XMT XMT

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