Patton electronic 2070 User Manual

USER
MANUAL

Model 2070 Series

V.24/X.21/V.35 to G.703
Interface Converter

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

http://www.patton.com

Part# 07M2070-UM
Doc# 03106U2-001,
Rev. D
Revised 10/25/06

An ISO-9001

Certified Company

CERTIFIED

TABLE OF CONTENTS

Section Page

1.0 Warranty Information.............................................................2

1.1 Radio and TV Interference

1.2. CE Notice

1.3 Service Information

2.0 General Information...............................................................4

2.1 Product Features

2.2 General Product Description

3.0 Configuration .........................................................................5

3.1 Opening the Case

3.2 Configuration (Model 2070/Ax

V.24 Version)

3.3 Configuration (Model 2070/Cx V.35 Version)

3.4 Configuration (Model 2070/Dx X.21 Version)

4.0 Installation ...........................................................................18

4.1 Connecting Over a PCM Network Channel

4.2 Connecting over Private Twisted Pair

4.3 DTE (Terminal) Connection

4.4 Power Connection

5.0 Operation.............................................................................21

5.1 LED Status Monitors

5.2 Test Mode

Appendix A - Specifications........................................................23

Appendix B - Cable Recommendations......................................24

Appendix C - Factory Replacement Parts & Accessories...........25

Appendix D - Interface Pin Assignments ....................................26

Appendix E - Block Diagram.......................................................28

1

2

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 2070 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 2070 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 2070 has been tested and complies
with the limits for a Class A computing device in accordance with the
specification in Subpart J of Part 15 of FCC rules, that are designed to
provide reasonable protection from such interference in a commercial
installation. However, this is no guarantee that interference will not
occur in a particular installation. If the Model 2070 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, reorienting 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 use only a shielded twisted
pair data cable that is bonded to metalized external outer shield plugs
at both ends. The use of a shielded cable satisfies compliance with the
Electromagnetic Compatibility (EMC) directive by allowing proper
shielding of the network connection.

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.

1.3 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 Service: [phone], http://www.patton.com;

[e-mail].

NOTE: Packages received without an RMA number will not be

accepted.

Patton Electronics’ technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2070. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

3

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 or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Customer Service at [phone].

2.1 FEATURES

• Bi-directionally converts V.24, X.21 or V.35 to co-directional G.703

• Operates at 64 kbps synchronous data rate

• LED indicators monitor Test Mode and Synchronization

• Internal, external or network clocking options (External clocking on
V.24 and V.35 versions only)

• Test Mode controlled by switch or by local DTE (V.24 and V.35
Versions Only)

• Complies with CCITT/ITU G.823 Jitter Control Specifications

• Built-in surge protection and transformer isolation

• Point-to-Point distance up to 5250 ft (1600m) on 24 AWG twisted
pair

• 120 ohm (twisted pair) network termination

2.2 DESCRIPTION

The Patton Model 2070 Miniature Interface Converters allow a

synchronous V.24, V.35, or X.21 device to communicate bi-directionally
over the G.703 co-directional PCM network. Supporting internal,
external DTE timing or G.703 network generated timing, the Model
2070 is perfect for networking applications that require a single 64
kbps data channel.

The Model 2070 connects directly to the synchronous DTE using

a DB-25 connector (Model 2070/Ax), an M/34 connector (Model
2070/Cx) or a DB-15 connector (2070/Dx). A 120 ohm twisted pair
telephone port provides the interface for the G.703 network.
Additionally, 75 ohm terminations can be made using the Patton Model
460 (G.703 balun).

Diagnostics include Local Loopback and G.703 Loopback testing.

Synchronous clock jitter is attenuated in accordance with the G.823
specification.

4

3.0 CONFIGURATION

The Model 2070 is easy to install and is ruggedly designed for
excellent reliability. The following instructions will help you set up and
install the Model 2070 properly.

3.1. OPENING THE CASE

To use the Patton Model 2070, you must first configure the unit for
your application. To do so, first open the case by inserting a flat head
screw driver into an open slot on either side of the case, as in Figure 1.

Twist the screw driver head slightly and the top half of the case will
separate from the lower half, as in Figure 2. You now have access to
the internal switches used to configure the unit.

After opening the case, please refer to the section that pertains to
your unit for configuration details.

5

Figure 1. How to Use a Small Flathead Screwdriver to Begin to Open the Model 2070 Case

Figure 2: How to Use a Small Flathead Screwdriver to Finish Opening the Model 2070 Case

Notice! The RJ-45 G.703 port of the Model 2070 is intended

to connect to telecommunication network voltage (TNV)
circuits which may carry dangerous voltages. Therefore the
power and network cables must be disconnected prior to
switch and jumper configuration.

3.2 CONFIGURATION (MODEL 2070/Ax V.24 VERSION)

The Model 2070/Ax uses a mini DIP switch package and jumper
strap that allow configuration to a wide range of applications. The
switch and the jumper are located on the bottom side of the PC Board.
Follow the instructions below to configure the 2070/Ax (V.24 Version).

See Section 3.3 to configure the Model 2070/Cx (V.35 Version) or
Section 3.4 to configure the Model 2070/Dx (X.21 Version)

3.2.1 Configuration Switch Set “S1”

The four switches on DIP Switch S1 are used to select the test
mode and clock mode functions. Figure 3 shows the position of Switch
S1 on the bottom side of the Model 2070/Ax PC board.

Figure 4 shows the orientation of the Switches on DIP Switch S1
with respect to ON/OFF positions. The default settings for DIP switch
S1 are shown in the table on page 7. Detailed descriptions of each
switch follow the table.

6

Figure 4. Close-up of DIP Switches Showing “ON” and “OFF” Positions

Figure 3. Location of Switch S1 on the bottom of the Model 2070/Ax PC board

OFF

ON

Switch S1

1234

1234

ON

ON

1234

Switches S1-1: Test Mode Activation

Use Switch S1-1 to enable or disable the Model 2070/Ax Test
Mode. When enabled, the Local Line and G.703 loopback tests
activate simultaneously. When disabled, the Model 2070/Ax functions
normally.

S1-1

Activation Description

On Enabled Local Loop and G.703 Loop

diagnostics enabled

Off Disabled Local Loop and G.703 Loop

diagnostics disabled

Switches S1-2 and S1-3: Clocking Mode

Use Switches S1-2 and S1-3 together to set the system clock for
the Model 2070/Ax. When using two Model 2070s together in a point­to-point application as short range modems, set one unit for either
Internal or External transmit clock and the other unit to Network clock.
When connecting directly to the G.703 network, set the unit to Network
clock.

S1-2 S1-3 Clocking Description

On On Network The G.703 network

provides the system clock

On Off External The DTE provides the

system clock

Off On Internal The Model 2070/Ax

provides an internally
generated system clock

7

2070/Ax SWITCH S1 SUMMARY TABLE

Position Function Factory Default

S1-1 Test Mode Off Disabled
S1-2 Clock Mode On
S1-3 Clock Mode On
S1-4 Respond to LL Request On Disabled

}

Network

Clock

8

Switch S1-4: Response to DTE Request for Local Loopback

Use Switch S1-4 to enable the Model 2070/Ax to enter Local
Loopback mode when pin 18 from the V.24 interface is raised. In the
On position, the Local Loopback may only be enabled manually by
Switch S1-1.

S1-4 Activation Description
On Disabled Model 2070/Ax ignores DTE

requests to enter Local Loopback

Off Enabled Model 2070/Ax enters Local

Loopback Mode when pin 18 is
raised

3.2.2 Jumper Straps “JP1” and “JP2”

The Model 2070/Ax uses two jumper straps to select the power
source option and to connect the unit signal ground to frame ground.
Figure 5 (below) shows the position of Jumper Straps JP1 and JP2 on
the bottom side of the Model 2070/Ax PC board.

Figure 6 shows possible settings of jumper straps JP1 and JP2.
JP1 may be positioned on pegs 1 and 2 or on pegs 1 and 3; JP2 may
be positioned on pegs 4 and 6 or on pegs 5 and 6.

Figure 5. Location of Strap JP1 and JP2 on the bottom of the Model 2070/Ax PC board

Figure 6. Possible Settings of Jumper Straps JP1 and JP2

1
3
5

2
4
6

Jumpers JP1

& JP2

1

2

3

5

6

JP2

JP1

4

1234

ON