Patton electronics NetLink-E1 2715 Manuel utilisateur

USER

MANUAL

MODEL 2715

NetLink-E1:

E1/Fractional E1 NTU

SALES OFFICE

(301) 975-1000

TECHNICAL SUPPORT

(301) 975-1007

http://www.patton.com

Part# 07M2715-A

Doc# 086051UA

Revised 12/10/98

An ISO-9001

Certified Company

PATTON MODEL 2715

TABLE OF CONTENTS

Section Page

1.0 General Information...............................................................2

1.1 Warranty Statement

1.2 Radio and TV Interference

1.3 CE and Telecommunication Approvals

1.4 Service Information

2.0 General Information........................................................5

2.1 Features

2.2 General Product Description

2.3.1 The 2715 as the Interface between the Telco and CPE

2.3.2 The 2715 as a High-Speed Short Range Modem

2.3 Supported Applications

3.0 Configuration .........................................................................7

3.1 DIP Switch Configuration

3.2 Software Configuration

3.2.1 Introduction to Main Menu

3.2.2 System Configuration

3.2.3 System Diagnostics

3.2.4 Unit Options

4.0 Installation ..........................................................................26

4.1 DTE Interface Connection

4.2 Network Interface Connection

4.3 Power Connection

4.3.1 Using The AC Power Supply (100-240VAC)

4.3.2 Supplying DC Power

4.3.3 Supplying Power via pin KK

5.0 Operation.............................................................................28

5.1 LED Descriptions

5.2 Loop (V.54 & Telco) Diagnostics

5.2.1 Operating Local Loopback (LL)

5.2.2 Operating Remote Digital Loopback (RDL)

5.3 Bit Error Rate (V.52) Diagnostics

Appendix A - Specifications........................................................33

Appendix B - Cable Recommendations......................................34

Appendix C - Factory Replacement Parts and Accessories ......35

Appendix D - Interface Pin Assignments....................................36

Appendix E - Power Supply Interface.........................................38

1.0 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 OneYear parts and labor. If any questions or problems arise

during installation or use of this product, please do not hesitate to con-

tact Patton Electronics Technical Services at (301) 975-1007.

1.1 WARRANTY STATEMENT

Patton Electronics warrants all Model 2715 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 warran-

ty is limited to defects in workmanship or materials, and does not cover

customer damage, abuse, or unauthorized modification. This product

contains no serviceable parts; therefore the user shall not attempt to

modify the unit in any way. 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 dam-

ages include, but are not limited to, the following: lost profits, lost sav-

ings and incidental or consequential damages arising from the use of

or inability to use this product. Patton Electronics specifically dis-

claims 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. In the event the user detects intermittent or continuous prod-

uct malfunction due to nearby high power transmitting radio frequency

equipment, the user is strongly advised to use only data cables with an

external outer shield bonded to a metal or metalized connector.

1.4 SERVICE INFORMATION

All warranty and non-warranty 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 at:

tel: (301) 975-1007;

email: [email protected]

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

Patton Model 2715. Technical Services hours: 8AM to 5PM EST,

Monday through Friday.

1.2 RADIO AND TV INTERFERENCE

The Model 2715 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 tele-

vision reception. The Model 2715 has been tested and found to com-

ply 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 2715 does

cause interference to radio or television reception, which can be deter-

mined by disconnecting the cables, 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).

1.3 CE AND TELECOMMUNICATION APPROVALS

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.

The Model 2715 is in compliance with the Telecommunication

technical requirements CRT-12; 2.048 Mbps digital unstructured

leased line (D2048U) attachment requirements for terminal equipment

interface.

The Model 2715 also meets the Telecommunication technical

requirements CTR-13; 2.048 Mbps digital structured leased lines

(D2048S) attachment requirements for terminal equipment interface.

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 OneYear parts and labor. If any questions arise during installa-

tion or use of the unit, contact Patton Electronics Technical Services at

(301) 975-1007.

2.1 FEATURES

• Terminates E1/FE1 Circuits over a 4-Wire RJ-48C interface

• Connects to standard CPE Serial Interfaces

• Common Framed nx64 rates up to 1.984 Mbps

• Unstructured Rate of 2.048 Mbps

• G.703 or G.704 Framing (with or without CRC-4, CAS multi-

frame)

• Selectable AMI or HDB3 Line Coding

• Configuration via Control Port or Internal DIP Switches

• Seven Easy-to-Read LED Indicators Monitor Data & Diagnostics

• Internal, External or Receive Recover Clocking

• Also Operates as a High-Speed Point-to-Point Modem

• Compact Size Plugs Directly into a Router, Switch or other DTE

• Made in USA

2.2 GENERAL PRODUCT DESCRIPTION

The Patton Model 2715 Network Termination Unit (NTU) terminates

both 2.048 Mbps G.703 E1 (clear channel) and fractional E1 G.704 (n

x 64) 4-wire circuit. housed in our MicroPak enclosure measuring only

9 x 5.3 x 2 cm (3.55 x 2.1 x 0.78 in.) the Model 2715 plugs directly

into the V.35 DTE interface of a router, switvh, FRAD, multiplexer or

other networking device.

The Model 2715 supports all necessary G.703/G.704 diagnostics, DTE

local/remote loops, and V.54 loop up/loop down. Diagnostics are initiat-

ed via the Model 2715's control port, or through the DTE or line inter-

faces. Easily readable LED indicators include TD, RD, Loss of Sync

(LOS), Alarm, Error, Test and Power. Configuration of the Model 2715

is done through the control port or using DIP switches.

The Model 2715 presents a RJ45 120 ohm interface to the line and a

V.35 interface to the customer's device using a Male M/34 connector.

An M/34 to DB-60 adapter cable is available for convenient connection

to Cisco routers. The Model 2715 is powered by an external Universal

Input 100-240VAC adapter.

2.3 SUPPORTED APPLICATIONS

The Model 2715 provides an E1 network termination between E1

and Fractional E1 equipment and customer premises equipment (CPE)

such as a router. The Model 2715 can also be used as a high-speed

short haul modem for campus applications.

2.3.1 The 2715 as the Interface between the Telco and CPE

The Model 2715 provides the interface between an E1/Fractional

E1 multiplexer and a router or switch (See below).

2.3.2 The 2715 as a High-Speed Short Range Modem

The Model 2715 can also be installed into high-speed campus

applications. In this application, a pair of Model 2715 units operate as

short range modems (See below).

Model 2715 Model 2715

Model 2715

Switch SW1: Line Coding

Use Switch SW1 to control the Network Line Coding options. Set

these options to be the same as the Line Coding given to you by your

Service Provider. If you are using two Model 2715s together as short

range modems, set both units to HDB3.

SW4 Line Framing & Coding

Off HDB3

On AMI

Line Coding Options:

High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter

deliberately inserts a bipolar violation when excessive zeros

in the data stream are detected.The receiver recognizes

these special violations and decodes them as zeros.This

method enables the network to meet minimum pulse density

requirements. Use HDB3 unless AMI is required in your

application .

Alternate Mark Inversion (AMI): AMI coding does not inherently

account for ones density. To meet this requirement, the user

should ensure that the data inherently meets pulse density

requirements.

3.0 CONFIGURATION

The Model 2715 features configuration capability via hardware

switches or a software control port. This section describes all possible

hardware and software switch configurations of the Model 2715.

3.1 DIP SWITCH CONFIGURATION

The Model 2715 has eight internal DIP switches that allow configu-

ration for a wide range of applications. The eight switches are

accessed by opening the plastic case with a small screwdriver. Figure

1 (below) shows the location of the DIP switches on the bottom of the

printed circuit board.

The Model 2715 DIP switches (Switches SW1 - SW8) can be con-

figured as either “On” or “Off”. Figure 2 (below) shows the orientation

of the DIP switches with respect to ON/OFF positions.

Default positions for Switches SW1-SW8 are shown in the table on

the following page. Descriptions of each switch follow the table.

Figure 1. Model 2715 bottom view, showing location of DIP switches

OFF

Figure 2. Close up of DIP switches showing ON/OFF positions.

The switch is shown in the Off position.

SWITCH SET SUMMARY TABLE

Position Function Factory Default Selected Option

SW1 Line Coding Off HDB3

SW2 CAS Multiframe Off Disabled

SW3 CRC-4 Multiframe Off Disabled

SW4 Clock Mode Off Network

SW5 DTE Rate Off

SW6 DTE Rate Off

SW7 DTE Rate Off

SW8 DTE Rate Off

2.048 Mbps

Clear

Channel

}

DIP Switches

OFF

Software Configuration Port

Switch SW2: CAS Multiframe

The Channel Associated Signaling (CAS) multiframe uses Timeslot 16

(TS16) to send multiframe (MF) alignment data. In CAS MF, a multi-

frame is defined as 16 frames, where a frame consists of 32 64kb/s

timeslots, numbered 0 to 31.TS16 of the first frame in the MF contains

the CAS MF alignment word in the upper four bits.The alignment word

is always 0000 (binary).The 2715 does not perform any signaling in

TS16 other than to insert the MF alignment word, in order to maintain

MF alignment.When CAS MF disabled, the unit transmits user data in

TS16; therefore, up to 31 channels are available for user data.When it

is enabled, TS16 is not available to the user. In this case, the user can

use up to 30 channels for data. CAS MF can be used with CRC-4 MF

or by itself.When enabled, both units must employ CAS MF; if one unit

is set for CAS MF, and the other is not, the one using CAS MF will

detect a loss of sync.

SW2 Option

Off Disabled

On Enabled

Switch SW3 & SW4: CRC-4 Multiframe/Clock mode

In framed mode, SW3 is used for CRC-4 MF. CRC-4 Multiframe uses

Time Slot zero to carry CRC-4 information. It operates independently of

CAS MF.When CRC-4 is enabled, the unit monitors the incoming data

stream for CRC-4 errors. It transmits CRC-4 error counts to the trans-

mitting unit. Excessive errors may cause loss of frame or loss of sync.

If CRC-4 MF is used, both units must be set for set for CRC-4 MF.

Otherwise, the one using CRC-4 MF will detect loss of sync.

In unframed mode, SW3 is used to along with SW4 to determine the

clock mode.In unframed mode, the model 2715 can be set to network,

internal or external clock mode.This is done by setting both SW3 and

SW4 to the on position.

In framed mode SW4 is used alone to determine the 2715 transmitter

timing.The 2715 can be set to Network or Internal clock.

The following charts represent both cases.

CLOCK MODES

Network Clock Transmitter timing is derived from the received line

signal.

Internal Clock Transmitter clock is derived from an internal clock

source.

External Clock Transmitter timing is derived from the local DTE

device.Valid only in unframed mode.

Note: When using the 2715 as a high-speed short range modem, one

unit of the link must be configured in either internal or external clock,

and the other end must be configured for network clock mode.

Switches SW5, SW6, SW7, and SW8

Use Switches SW5, SW6, SW7, and SW8 to set the DTE data rate.

SW5 SW6 SW7 SW8 Speed

Off Off Off Off Clear Channel (2.048Mbps)

On Off Off Off 64kbps

Off On Off Off 128kbps

On On Off Off 192kbps

Off Off On Off 256kbps

On Off On Off 384kbps

Off On On Off 512kbps

On On On Off 640kbps

Off Off Off On 768kbps

On Off Off On 1024kbps

Off On Off On 1280kbps

On On Off On 1536kbps

Off Off On On 1600kbps

On Off On On 1920kbps

Off On On On 1984kbps

On On On On invalid

MULTIFRAME(G.704)

SW3 CRC-4 MF SW4 Clock Mode

On On Off Network

Off Off On Internal

UNFRAMED (G.703)

SW3 SW4 Clock Mode

Off Off Network (Default)

Off On Internal

On On External

On Off Network

NOTE: When the data rate is set to 2.048Mb/s, then the unit is

forced into G.703 mode, and it transmits user data on all 32 times-

lots.There is no framing information; therefore, the CAS MF

(SW2)and CRC-4 (SW3) switches are ignored. In all other rate

settings, the unit employs G.704 framing;TS0 is reserved for sig-

naling.

3.2 SOFTWARE CONFIGURATION

The Model 2715 features a menu-driven command system that

allows you to monitor/configure its operating parameters. Follow the

instructions below to configure the Model 2715 using the software

switches:

1) Plug the 9-pin male end of the cable to your terminal or com-

puter’s DB-9 serial port and start up the terminal emulator

software if necessary. Plug the miniature stereo plug into the

rear of the unit. The small recessed jack on the right side of

the unit is the control port jack.

NOTE: If your terminal uses a DB-25 connector, please use

a DB-9 to DB-25 Adapter to connect to the cable (See Model

18PC-M).

2) Power up the terminal and set its RS-232 port as follows:

9600 Baud

8 data bits, 1 stop bit, no parity

Local echo off

ANSI or VT-100 emulation

Xon/Xoff software flow control enabled

3) Here is an example of a terminal emulator setup session. In

normal font are the various parameter types. In bold type are

the values that should be used for best results.Your terminal

program’s setup screen may differ from this one:

4) When the unit is first turned on, the terminal screen may

appear blank. Press the [Enter] key. If your serial connection

is good, then the unit will immediately display a password

prompt.The following message will appear in the middle of

the screen:

5) Type in the password and press [Enter].The factory default

password for the unit is:

patton

NOTE: The password is case sensitive. If the entry is incor-

rect, the password screen will clear and prompt you again for

the correct password.The password you enter will not be

shown. For security, asterisks will be displayed for each letter

you type.The maximum length of the password, which can

include any character the terminal can generate, is 16 charac-

ters.

6) The Model 2715 will then display the Main Menu screen.

Baud rate: 9600 Parity: None Data Length: 8Stop Bits: 1

Default terminal type: VT100

Local Echo: Off

Add Line Feeds after CRs: Off

Received Backspace Destructive: On

Backspace key sends: BS

XON/XOFF software flow control: On

CTS/RTS hardware flow control: Off

DSR/DTR hardware flow control: Off

Patton Electronics

Menu Management

Enter Password: _

3.2.1 Introduction to Main Menu

After entering the password, you may access all of the system’s

functions and parameters.The Main Menu looks like this:

HELPFUL HINTS

1. To make a selection, key the highlighted letter that corre-

sponds to a menu selection.

2. To execute the selection, type [Enter/CR].

3. To toggle between options on a highlighted selection, Press

[space].

4. Select gSave Changes from Main Menu after making modi-

fications to any Model 2715 parameter. Otherwise, changes

will be lost when the Model 2715 is turned off.

The Main Menu options are briefly described below.

System Configuration options allow you to change various

aspects of the Model 2715’s operation, e.g., framing, line cod-

ing, and aggregate bandwidth.

System Diagnostics/Statistics options allow you to monitor

the network performance, initiate V.54 loops, local loops, and

send test patterns. Network performance parameters are

updated once a second, giving you the ability to quickly deter-

mine if there is a problem.

Unit Options allow you to customize the Model 2715 for your

location.You can change the default header names to give

each unit a unique name and password. Also, you can reset

the unit to its default settings without the manual. It also has a

Service Information screen in case you need technical assis-

tance from Patton.

Save Changes Once you have configured the unit to your

satisfaction, you can save the changes permanently by exe-

cuting the Save Changes command.This will update the unit’s

configuration and save all the parameters to permanent mem-

ory.

Logoff For security, log off the control menu by executing the

Logoff command. This will blank the screen until an [Enter]

key is pressed.

3.2.2 System Configuration

The System Configuration menu looks like this:

The System Configuration options are described below:

Line Format: G.703

(default)

Options: G.703, G.704

G.703: G.703 is unframed, 2.048Mb/s. In this case, the DTE rate

is equal to the line rate at the network interface (NI).CAS MF

and CRC-4 are disabled.

G.704: G.704 reserves TS0 for signaling and frame alignment.

Maximum data rate depends on whether CAS MF is enabled

or not.

15 16

Line Coding: HDB3

(default)

Options: AMI, HDB3

HDB3: In this line coding, the transmitter substitutes a deliberate

bipolar violation when excessive zeros in the data stream are

detected.The receiver recognizes these special violations and

decodes them as zeros.This method enables the network to

meet minimum pulse density requirements. Unless AMI is

required in your application, HDB3 should be used whenever

possible.

AMI: Alternate Mark Inversion defines a pulse as a "mark,” a

binary one, as opposed to a zero. In a E1 network connection,

signals are transmitted as a sequence of ones and zeros.

Ones are sent as pulses, and zeros are sent as spaces, i.e.,

no pulse. Every other pulse is inverted from the previous

pulse in polarity, so that the signal can be effectively transmit-

ted.This means, however, that a long sequence of zeros in

the data stream will cause problems, since the NTU receiving

the signal relies on the signal to recover the 2.048 Mb/s clock.

If you must use AMI, you should ensure that the data terminal

equipment connected to the unit provides a minimally accept-

able pulse density. For this reason, there are advantages to

using HDB3 instead.

Clocking: Network

(default)

Options: Network, Internal, External

Network: This is the most commonly used setting when connect-

ing to a carrier’s network. In this mode, the unit recovers the

clock from the received signal and uses it to transmit data. In

this way the unit remains synchronized to a master clock. In

campus applications, one of the units must be set to Internal

clock, and the other end is set to Network clock.At all times,

there must be only one clock source. Otherwise, clock slips

and framing errors and bit errors may occur.

Internal: This is commonly used in campus applications, where

the unit is not connected to the public telephone network

directly. In this mode, the unit uses the on-board oscillator as

the transmit clock source.

External: This is a special mode that can only be used with the

Unframed format. In this mode, the unit requires a 2.048 Mhz

clock signal from the DTE via the external clock pin on the

DTE interface connector. Most applications will use Network

or Internal clock modes.

CRC-4 Setting: Disabled

(default)

Options: Enabled, Disabled

CRC-4 Multiframe: CRC-4 Multiframe uses TS0 to carry CRC-4

information. It operates independently of CAS MF.When CRC-

4 is enabled, the unit monitors the incoming data stream for

CRC-4 errors. It transmits CRC-4 error counts to the transmit-

ting unit . Excessive errors may cause loss of frame or loss of

sync. If CRC-4 MF is used, both units must be set for CRC-4

MF; otherwise, the one using CRC-4 MF will detect a loss of

sync.

CAS MF Setting: Disabled

(default)

Options: Enabled, Disabled

CAS MF: CAS multiframe uses Timeslot 16 (TS16) to send multi-

frame (MF) alignment data. In CAS MF, a MF is defined as 16

frames, where a frame consists of 32 64kb/s timeslots, num-

bered 0 to 31.TS16 of the first frame in the MF contains the

CAS MF alignment word in the upper four bits.The alignment

word is always 0000 (binary). The 2715 does not perform any

signaling in TS16 other than to insert the MF alignment word,

in order to maintain MF alignment.When CAS MF disabled,

the unit transmits user data in TS16; therefore, up to 31 chan-

nels are available for user data. When it is enabled, TS16 is

not available to the user. In this case, the user can use up to

30 channels for data. CAS MF can be used with CRC-4 MF or

by itself.When enabled, both units must employ CAS MF; if

one unit is set for CAS MF, and the other is not, the one using

CAS MF will detect a loss of sync.

V.54 Loops: Enabled

(default)

Options: Enabled, Disabled

This is a special in-band loopback facility that sends a special pseudo-

random pattern over the data stream.This is the only loopback that the

unit can initiate.This is useful for campus applications when you need

to put a remote unit in loopback.The unit responds to the V.54 loop-

back command, and the whole process takes only a few seconds to

complete. When V.54 Loopback is disabled, the unit will not be able to

send or respond to V.54 loopback commands.The duration of the loop-

back is limited by the loopback timeout setting. While V.54 is being

activated, user data is overwritten.

Default Config Source: Switch (default)

Options: EEPROM, Switch

The Model 2715 can be initialized via the configuration in the on-board

permanent memory (EEPROM) or via the internal DIP switches

(Switch). Once the unit is powered up, you may change the settings

through the control port or the DIP switches. When you make changes

through the control port, no changes will take place or be saved to per-

manent memory until you Save Changes (Main Menu option "d" +

[Enter]).When you make changes through the switches, all changes

are made immediately.

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