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USER MANUAL

I-DSL128

Single / Port Leased Line Modem

The information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication. The company assumes no responsibility, however, for possible errors or omissions, or for any consequences resulting from the use of the information contained herein. The company reserves the right to make changes in its products or product specifications with the intent to improve function or design at any time and without notice and is not required to update this documentation to reflect such changes.

The company makes no warranty, representation, or guarantee regarding the suitability of its products for any particular purpose, nor does The company assume any liability arising out of the application or use of any product and specifically disclaims any and all liability, including without limitation any consequential or incidental damages.

The company products are not designed, intended, or authorized for use in systems or applications intended to support or sustain life, or for any other application in which the failure of the product could create a situation where personal injury or death may occur. Should the Buyer purchase or use a The company product for any such unintended or unauthorized application, the Buyer shall indemnify and hold The company and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, expenses, and reasonable attorney fees arising out of, either directly or indirectly, any claim of personal injury or death that may be associated with such unintended or unauthorized use, even if such claim alleges that The company was negligent regarding the design or manufacture of said product.

TRADEMARKS

Microsoft is a registered trademark of Microsoft Corp.

HyperTerminal™ is a registered trademark of Hilgraeve Inc.

WARNING:

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference in which case the user will be required to correct the interference at his own expense. NOTICE: (1) The changes or modifications not expressively approved by the party responsible for compliance could void the user's authority to operate the equipment. (2) Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits.

CISPR PUB.22 Class A COMPLIANCE:

This device complies with EMC directive of the European Community and meets or exceeds the following technical standard. EN 55022 - Limits and Methods of Measurement of Radio Interference Characteristics of

Information Technology Equipment. This device complies with CISPR Class A.

WARNING:

This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

CE NOTICE

Marking by the symbol CE indicates compliance of this equipment to the EMC directive of the European

Community. Such marking is indicative that this equipment meets or exceeds the following technical standards: EN

55022:1994/A1:1995/A2:1997 Class A and EN61000-3-2:1995, EN61000-3-3:1995 and EN50082-1:1997

CTC Union Technologies Co., Ltd.

Far Eastern Vienna Technology Center (Neihu Technology Park)

8F, No. 60, Zhouzi St.

Neihu, Taipei, 114

Taiwan

Phone: +886-2-2659-1021

FAX: +886-2-2799-1355

I-DSL128

Single/Port Leased Line Modem.

User Manual

Version 1.1 September 2005 Released for first printing

This manual supports the following models:

I-DSL128

This document is the first official release manual. Please check CTC Union's website for any updated manual or contact us by E-mail at [email protected]. Please address any comments for improving this manual or to point out omissions or errors to [email protected]. Thank you.

The information contained in this document may be updated at any time without notice.

Table of Contents

1 Introduction to the I-DSL128 …………………………. 1

1.1 General Overview ………………………………………. 1

1.2 Applications for I-DSL128 ……………………………….. 2

1.3 Hardware Overview …………………………………….. 3

1.4 Factory Default Setup for the I-DSL128 ………………. 7

2 Installation ……………………………………………… 7

3 Configuration …………………………………………. 9

3.1 LT/NT ……………………………………………………… 10

3.2 Data Rate ………………………………………………….. 11

3.3 Clock Mode ……………………………………………….. 12

3.4 Restart Device …………………………………………….. 13

3.5 Load Default Settings ……………………………………. 14

4 Maintenance ……………………………………………. 15

4.1 Show Status ……………………………………………….. 16

4.2 Local Loopback …………………………………………… 17

4.3 Digital Loopback ………………………………………… 19

4.4 CSU Loopback …………………………………………… 21

4.5 DSU Loopback …………………………………………… 23

4.6 2047 BERT ………………………………………………… 27

Appendix A ……………………………………………….. 30

Appendix B ……………………………………………….. 31

i

Table of Contents

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I-DSL128 USER’S MANUAL

2 Introduction to the I-DSL128

The I-DSL128 is a stand-alone data circuit-terminating equipment (DCE) unit that connects data terminal equipment (DTE) to the digital data network (DDN). The

I-DSL128 utilizes 2B1Q line coding and echo cancellation technique for full duplex operation at synchronous 64Kbps or 128Kbps transmission rate over 2-wire unconditioned twisted pair.

The I-DSL128 family consists of the following: z

Single DTE port

The I-DSL128 family provides the type of DTE interfaces as following: z V.35 z

EIA-530 z V.36/RS-449

1.1 General Overview

The I-DSL128 is a stand-alone leased line modem with the following features: z

Support for 64Kbps of bandwidth for high speed data applications z One DTE port z

One LCD panel and four push buttons z Ability to display and configure local and remote system parameters z

Three system clock sources:

„ Loop timing

„

Internal timing

„ External timing: From DTE interface z

Four loopback functions:

„ Local loopback

„

Digital loopback

„ CSU loopback

„

DSU loopback z Built-in 2047 BERT pattern generator and receiver for each DTE port z

AC or DC power input (depending on model)

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I-DSL128 USER’S MANUAL

1.2 Applications for I-DSL128

The following sections show you the possible applications for the I-DSL128. z The I-DSL128 delivers dedicated digital access to remote users when they are connected to a central office over a PCM, Advance D4 Channel Bank (AD4),

Digital Loop Carrier (DLC) system or U loop ISDN repeater (Figure 1).

PCM / AD4 PCM / AD4

T1

OCU

- DP

OCU

- DP

Figure 1 I-DSL128 connects with multiplexer system z The I-DSL128 can serve as a 64Kbps limited distance modem for leased line application (Figure 2).

DSL

DTE DTE

Figure 2 I-DSL128 leased line application

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I-DSL128 USER’S MANUAL

1.3 Hardware Overview

Figure 3 Overview of the I-DSL128

1.3.1 Front Panel

The I-DSL128's front panel (Figure 4) consists of the following: z LCD module z LED module z

Push button module

Figure 4 I-DSL128 front panel

3

I-DSL128 USER’S MANUAL

1.3.1.1 LCD Display

LCD Function

Show status and setups

Note

1. English display

2. Backlight

3. 16 X 2 character display

Table 1 Function of the LCD

1.3.1.2 LED Indictors for I-DSL128

Note

Power Power Indicator

Error Bit error detection

Green

Red

Green

On Power normal

Off Port G64KC 2047 BERT closed or no error detection

Off System and remote unsynchronized

On System and remote synchronized

BERT Bit Error Rate Test Red

Loop Testing Yellow

Blink System detect DSL side CRC error (NEBE)

Off No 2047 BERT test

Green

Off System functioning normally

On System in testing mode

Off No data transmission from DTE to port

G64KC

On Data transmission from DTE to port

G64KC

Off No data transmission from port G64KC to

DTE

On Data transmission from port DTE-A to

DTE

Table 2 Function of the LED indictors

1.3.1.3 Push Buttons

Button Function

Esc Exit

Left Arrow

Right Arrow

Enter

Left

Right

Enter / Confirm

Table 3 Function of the LCD push button

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I-DSL128 USER’S MANUAL

1.3.2 Rear Panel

The I-DSL128’s rear panel (Figure 5) consists of the following: z DTE Interface z DSL Interface z

Power Interface

Figure 5 The I-DSL128 rear panel

Each interface has the following functions:

Label Function

POWER Power

AC-IN Power

DSL

DTE-A inlet:input voltage 90~264VAC / 10VA.

2B1Q Line interface port

Co-directional interface port

Table 4 Function of the rear panel

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I-DSL128 USER’S MANUAL

1.3.3 DTE Interface

The I-DSL128 family provides a single DTE interface as follows: z G.703 Co-Directional (G64KC)

The DTE interface of the I-DSL128 is fixed at 64Kbps.

1.3.4 DSL Interface

1.3.4.1 DSL Characteristics

z

Line coding: 2B1Q z Type: Full duplex with adaptive echo cancellation z

Impedance: 135Ω z Physical line type: Unconditioned twisted pair, 19-26AWG z

Conforms to ANSI T1.601-1992

1.3.4.2 DSL Connector

The I-DSL128's DSL interface provides a 2-wire RJ45 for ISDN basic rate

U-interface.

1.3.4.3 DSL Protection

There are surge protectors, current limiters and fuses for the primary protection and zener diodes and a diode bridge for secondary protection. The

I-DSL128

conforms to FCC Part 68 Type A & B.

1.3.4.4 Sealing Current

z

NT mode: The I-DSL128 provides a closed loop for sealing current. The loop resistance is about 334Ω. z

LT mode: The I-DSL128 emulates a constant current source. It outputs a

DC current of less than 20mA with a voltage of -42V~-56VDC. The I-

DSL128

can protect itself when the DSL loop shorts or when it connects with another current source.

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I-DSL128 USER’S MANUAL

1.4 Factory Default Setup for the I-DSL128

The I-DSL128 is supplied with a default setup, which is used when it is first started up. The default configuration is as follows:

System Parameters

LT/NT

DATA RATE

CLOCK SOURCE

Default Setup

DTE port (G64KC)

NT

64K

Loop

Table 5 System Default Setup

2 Installation

The following shows the rear panel of the I-DSL128 and the connection diagram.

Power

Switch

Power

Inlet

(AC shown)

DSL Line

Connector

G.703

Co-directional

Line Connector

Figure 6 I-DSL128 back panel connections

7

I-DSL128 USER’S MANUAL

To install the I-DSL128, proceed as follows:

Step 1 Connecting the I-DSL128 to the DSL (U interface)

Connect the DSL port labeled Line on the rear panel to the remote site.

Step 2 Connecting the G64KC (to other co-directional equipment)

Connect the DTE port labeled Data on the rear panel to the co-directional equipment using twisted pair cable.

Step 3 Connecting the Power Adaptor to your I-DSL128

Connect the power to the port labeled AC 90~264VAC on the rear panel of your

I-DSL128

.

Step 4 Turning on the power

Turn on the power switch labeled POWER on the rear panel of your I-DSL128.

The PWR LED lights up to indicate the power is normal. All the LED’s on the front panel (except for the PWR LED) will blink for five seconds. The LCD will show the following:

** I-DSL128 **

==========

After blinking for five seconds, the LED’s will turn off, and the I-DSL128 will begin a self-test. The local system tries to synchronize with the remote site.

After the initial setup, you can modify the configuration by using the LCD and the four push buttons (Left arrow, Right arrow, Esc, Enter) on the front panel.

8

I-DSL128 USER’S MANUAL

3 Configuration

You can change the I-DSL128's configuration from the local site only. You can change any of these 5 settings:

(1) LT/NT

(2) DATA RATE: time slot

(3) CLOCK SOURCE

(4) RESTART DEVICE

(5) LOAD DEFAULT SETTING

Note 1: Item (3) only shows up in the LT mode.

While setting up the items (1)~(2), the LCD will indicate current system settings by a

”->” sign. If the user needs to change the settings, just use (Left arrow) or (Right arrow) to move the cursor (blinking) to the preferred option, then press (Enter) to confirm the operation. After this, the ”->” sign will point to the new setting and indicate the device configuration has been change successfully.

The user may press (Esc) to leave any operating screen. If there are any settings changed before you leave the current screen, the system will remind user to save the changes. The screen displays this message:

* SAVE SETUP *

NO YES

If you choose YES, the settings will be saved in system.

If you choose NO or press (Esc), the settings will not be saved in system.

9

I-DSL128 USER’S MANUAL

3.1 LT/NT

Step 1 Enter ”DEVICE CONFIGURATION” screen, then press (Enter)

Step 2

DEVICE

CONFIGURATION

Use (Left arrow) or (Right arrow) to choose ”CHANGE SETUP”, then press (Enter) .

Step 3

Step 4

CHANGE

SETUP

Use (Left arrow) or (Right arrow) to choose ”LT/NT” screen, then press (Enter) .

*CHANGE SETUP*

LT/NT

Step 5

Use (Left arrow) or (Right arrow) to choose ”LT” or “NT”, then press (Enter) .

* LT/NT *

LT NT

The LCD will show one of the following messages to indicate successful completion.

* LT/NT *

LT MODE

* LT/NT *

NT MODE

10

I-DSL128 USER’S MANUAL

3.2 Data Rate

Step 1 Enter ”DEVICE CONFIGURATION” screen, then press (Enter)

DEVICE

CONFIGURATION

Step 2 Use (Left arrow) or (Right arrow) to choose ”CHANGE SETUP”, then press (Enter) .

Step 3

CHANGE

SETUP

Use (Left arrow) or (Right arrow) to choose ”DATA RATE”, then press (Enter) .

*CHANGE SETUP*

DATA RATE

note: G.703 64K co-directional must have fixed data rate of 64Kbps. The timeslot may be selected as either B1 or B2 channel and must match on both local and remote units.

Step 4 Use (Left arrow) or (Right arrow) to choose the G64kC time slot

(B1 or B2), then press (Enter) .

* G64KC*

64K ( B1 )

* G64KC *

64K ( B2 )

* G64KC *

OFF

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I-DSL128 USER’S MANUAL

3.3 Clock Mode

The I-DSL128 provides three options for system clock sources:

„ Loop timing

„

Internal timing

„ External timing: From Data interface (G64KC)

Note 1: Clock mode can only be configured when the system in the LT mode.

Note 2: When the system in the LT mode, it can be configured only as internal or external timing.(G64KC)

Note 3: When the system in the NT mode, loop timing is fixed.

Step 1 Enter ”DEVICE CONFIGURATION” screen, then press (Enter)

Step 2

Step 3

DEVICE

CONFIGURATION

Use (Left arrow) or (Right arrow) to choose ”CHANGE SETUP”, then press (Enter) .

CHANGE

SETUP

Use (Left arrow) or (Right arrow) to choose ”CLOCK SOURCE” screen, then press (Enter) .

Step 4

Step 5

*CHANGE SETUP*

CLOCK SOURCE

Use (Left arrow) or (Right arrow) to choose ”INT” for internal timing or G64KC for external timing, then press (Enter) .

* CLOCK SOURCE *

INT G64KC

The LCD will show one of the following messages to indicate successful completion.

* CLOCK SOURCE *

INTERNAL

* CLOCK SOURCE *

FROM G64KC

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I-DSL128 USER’S MANUAL

3.4 Restart Device

Step 1 Enter ”DEVICE CONFIGURATION” screen, then press (Enter)

DEVICE

CONFIGURATION

Step 2 Use (Left arrow) or (Right arrow) to choose ”RESTART

DEVICE”, then press (Enter) .

Step 3

RESTART

DEVICE

Use (Left arrow) or (Right arrow) to choose “YES”, then press

(Enter) .

Step 4

*RESTART DEVICE*

NO YES

The LCD will show the following message and the I-DSL128 will restart after 3 seconds.

RESTART DEVICE

AFTER 3 SECONDS

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I-DSL128 USER’S MANUAL

3.5 Load Default Settings

For factory default settings, please refer to Table 5.

Step 1 Enter ”DEVICE CONFIGURATION” screen, then press (Enter)

DEVICE

CONFIGURATION

Step 2 Use (Left arrow) or (Right arrow) to choose ”LOAD DEFAULT

SETTINGS”, then press (Enter) .

Step 3

Step 4

LOAD

DEFAULT SETTINGS

Use (Left arrow) or (Right arrow) to choose “YES”, then press

(Enter) .

*LOAD DEFAULT*

NO YES

The LCD will display the following message and the I-DSL128 will load default settings from EEROM and restart after 3 seconds.

LOAD DEFAULT

& RESTART DEVICE

14

I-DSL128 USER’S MANUAL

4 Maintenance

The I-DSL128 provides a user-friendly interface. The user can utilize the LCD and four push buttons (Left arrow, Right arrow, Esc, Enter) on the front panel to view system status (local).

The I-DSL128 provides four kinds of loopback and one built-in BERT function. These can be used to maintain, diagnose and test system and loop performance without any other equipment. The following screens can be displayed. z

Show Status z Local Loopback z

Digital Loopback z CSU Loopback z

DSU Loopback z BERT G64KC (2047)

Note 1: The CSU and DSU loopbacks will work properly under the DSL environment with a

10

-3

bit error rate.

Note 2: The Digital, CSU and DSU loopbacks could be activated only when the DSL is synchronized.

Note 3: The system will release the Digital, CSU and DSU loopbacks when the DSL is out-ofsync.

4.1 Show Status

The I-DSL128 can display system status of the local or remote site. 18 items are available: z LT/NT mode z Data Port Number z Clock mode z G64KC speed z Local loopback z Digital loopback z CSU loopback z DSU Loopback (G64KC) z BERT G64KC

15

I-DSL128 USER’S MANUAL

4.1.1 To View System Status

Step 1 Enter ”SHOW STATUS” screen, then press (Enter)

SHOW

STATUS

Step 2 Use (Left arrow) or (Right arrow) to check the system current status.

* MODE *

XX

* PORT NUMBER *

XX

* CLOCK MODE *

XXXXXX

* G64KC SPEED *

XXXXXX

* LOCAL LOOPBACK *

XXXXXX

* DIGITAL LOOPBACK *

XXXXXX

* CSU LOOPBACK *

XXXXXX

* DSU LOOP G64KC *

XXXXXX

* BERT G64KC *

XXXXXX

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I-DSL128 USER’S MANUAL

4.2 Local Loopback

When the local loopback is activated, it will utilize the local site of the I-DSL128 (see

Figure 7). This will test the transmitting/receiving functions of the local site. During this test, the remote unit will lose DSL synchronization. When the local loopback test is released, the system will restart and return to its initial state. During the local loopback testing period, the TST and ACT LED’s will be lit.

TD

RD

DTE

Local Site

Local

Loopback

Line Interface

Digital Interface

Remote Site

Figure 7 Local Loopback

TD

RD

DTE

17

I-DSL128 USER’S MANUAL

4.2.1 To Execute Local Loopback

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

DEVICE

DIAGNOSTIC

Step 2 Use (Left arrow) or (Right arrow) to choose “LOCAL

LOOPBACK”, then press (Enter) .

Step 3

LOCAL

LOOPBACK

Use (Left arrow) or (Right arrow) to choose “ON”, then press

(Enter) .

* LOCAL LOOP *

OFF ON

Step 4 The local loopback is executed successfully when the LCD shows ”-- LOCAL LOOP — OK !!” and both the SYNC and Loop

LED’s are lit. Otherwise, it shows ”-- LOCAL LOOP --

FAILED !!”, meaning the local loopback was not activated.

Step 5

Step 6

-- LOCAL LOOP --

OK !!

-- LOCAL LOOP --

FAILED !!

Use (Left arrow) or (Right arrow) to choose “OFF”, then press

(Enter) .

* LOCAL LOOP *

OFF ON

When the local loopback has been released successfully, the LCD shows “ -- LOCAL LOOP -- RELEASE OK !! ”. The Loop LED is turned off and the system returns to initial state.

-- LOCAL LOOP --

RELEASE OK !!

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I-DSL128 USER’S MANUAL

4.3 Digital Loopback

When the digital loopback is activated, it will test the transmitting/receiving functions of the I-DSL128 when using a DSL condition. The digital loopback function is only executable when the DSL connection is synchronized with the remote site. When this test is executed, all the payloads (B1 and B2 Channels) are looped and the Loop LED is lit and the DTE ports are turned off.

Note: When the digital loopback is activated, all the DSL payloads (B1 and B2 Channels) are occupied into a testing mode. So, CSU, DSU loopback and 2047 BERT are disabled in the local site.

TD

RD

DTE

Local Site

Digital

Loopback

Line Interface

Digital Interface

Remote Site

Figure 8 Digital Loopback

TD

RD

DTE

19

I-DSL128 USER’S MANUAL

4.3.1 To Execute Digital Loopback

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter).

Step 2

Step 3

Step 4

Step 5

Step 6

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “DIGITAL

LOOPBACK”, then press (Enter) .

DIGITAL

LOOPBACK

Use (Left arrow) or (Right arrow) to choose “B1+B2”, then press

(Enter) .

* DIGITAL LOOP *

OFF B1+B2

Digital loopback is executed successfully when LCD shows

”--DIGITAL LOOP — B1+B2 !!” and the Loop LED is lit.

-- DIGITAL LOOP --

B1+B2 OK !!

Use (Left arrow) or (Right arrow) to choose “OFF”, then press

(Enter) .

* DIGITAL LOOP *

OFF B1+B2

When the digital loopback has been released successfully, the

LCD shows “ -- DIGITAL LOOP -- RELEASE OK !! ”. The Loop

LED is turned off.

-- DIGITAL LOOP --

RELEASE OK !!

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I-DSL128 USER’S MANUAL

4.4 CSU Loopback

The CSU loopback is a testing function controlled from the unit in the LT mode. The

LT unit (the local site in Figure 9) sends loopback messages through an EOC, specified by ANSI T1.601, and the NT unit (the remote site in Figure 9) executes the loopback function when it receives a valid loopback command. The loopback tests the local and remote units and the DSL. This procedure may be performed without using other personnel. (The digital loopback requires two or more people).

TD

RD

Local Site (LT) eoc CSU

Loopback

Remote Site (NT)

TD

RD

DTE

B1 or B2 or 2B+D

Line Interface

Digital Interface

Figure 9 CSU Loopback

DTE

4.4.1 LT Mode

There are four kinds of EOC loopback messages that can be chosen : z Return To Normal (RTN): 1111 1111 z

Operate B1-Channel Loopback: 0101 0001 z Operate B2-Channel Loopback: 0101 0010 z

Operate 2B+D Loopback: 0101 0000

When you specify the eoc loopback message, it is sent continuously with the address ”000”. When one of the “operate” messages activates the CSU loopback, the TST LED will be turned on. It will be turned off when the RTN message is sent.

Note: When the CSU loopback is activated, the assigned DSL payloads (B1, B2 Channels or 2B+D) are occupied in a testing mode, so the digital loopback and DSU loopback of the corresponding DTE ports are disabled at the local site.

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I-DSL128 USER’S MANUAL

4.4.2 NT Mode

There are two modes available for the user: z

AUTO: Automatically detect EOC messages from the LT and execute the corresponding activation or release of CSU loopback. z

OFF: Ignore EOC messages from the LT.

Note 1: When the CSU loopback is activated, the assigned DSL payloads (B1, B2

Channels or 2B+D) are occupied in a testing mode, so the DSU loopback of the corresponding DTE ports and 2047 BERT are disabled at the local site.

Note 2: If the I-DSL128 is set to “OFF”, the system will release all the CSU loopbacks.

When the CSU loopback is activated, the Loop LED will be turned on. It will be turned off when the unit receives a valid RTN command.

All CSU replies (loopbacks) from the NT will be latching, permitting multiple

EOC loopback messages to be in effect simultaneously. When the NT receives the

RTN message, all the CSU loopbacks are released.

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I-DSL128 USER’S MANUAL

4.4.3 To Execute CSU Loopback

4.4.3.1 LT Mode

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

Step 2

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “CSU

LOOPBACK”, then press (Enter) .

Step 3

Step 4

Step 5

CSU

LOOPBACK

Use (Left arrow) or (Right arrow) to choose “B1”, “B2” or

“2B+D”, then press (Enter) .

* CSU LOOP *

RTN B1 B2 2B+D

The CSU loopback is executed successfully when the LCD shows ”-- CSU LOOP — REMOTE B1 OK!!”, ”-- CSU

LOOP — REMOTE B2 OK!!” or ”-- CSU LOOP —

REMOTE 2B+D !!” and the Loop LED is turned on.

-- CSU LOOP --

REMOTE B1 OK !!

-- CSU LOOP --

REMOTE B2 OK !!

-- CSU LOOP --

REMOTE 2B+D OK !!

Use (Left arrow) or (Right arrow) to choose “RTN”, then press (Enter) .

* CSU LOOP *

RTN B1 B2 2B+D

Step 6 When the LCD shows “ -- CSU LOOP – REMOTE RTN

OK !! ”, the CSU loopback has been released. The Loop LED is then turned off.

23

I-DSL128 USER’S MANUAL

-- CSU LOOP --

REMOTE RTN OK !!

4.4.3.2 NT Mode

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

Step 2

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “CSU

LOOPBACK”, then press (Enter) .

Step 3

CSU

LOOPBACK

Use (Left arrow) or (Right arrow) to choose “AUTO” or

“OFF”, then press (Enter) .

* CSU LOOP *

AUTO OFF

4.5 DSU Loopback

When you initiate the DSU loopback test, the transmitting unit will send a loopback message, specified by ITU-T V.54, to the receiving unit. Either the local or remote site can initiate the test. When the receiving unit receives a valid loopback message from the transmitting unit, it will send back an acknowledgement message and execute a

DSU loopback. This tests the B1, B2 or B1+B2 channel, as well as the condition of the

DSL.

When the DSU loopback is activated, the Loop LED will be turned on. It will be turned off when a valid release pattern is received.

24

I-DSL128 USER’S MANUAL

TD

RD

DTE

DTE-A or

DTE-B

Local Site

V.54 DSU

Loopback

Line Interface

Digital Interface

Remote Site

Figure 10 DSU Loopback

DTE-A or

DTE-B

TD

RD

DTE

There are four modes can be chosen by the user: z

DISABLE: Ignore ITU-T V.54 pattern from remote. z ENABLE: Detect ITU-T V.54 pattern from the remote site and execute the corresponding activation or release of DSU loopback automatically. z REQ REMOTE LOOP: Send ITU-T V.54 loopback pattern to the remote site to activate remote DSU loopback. z REQ REM RELEASE: Send ITU-T V.54 release pattern to remote site, to release remote DSU loopback.

4.5.1 To Execute DSU Loopback

4.5.1.1 Request Remote Loopback and Release

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

Step 2

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “DSU

LOOPBACK V.54 (G64KC))”, then press (Enter) .

Step 3

DSU LOOPBACK

V.54(G64KC)

Use (Left arrow) or (Right arrow) to choose “REQ REMOTE

LOOP” for request for remote CSU loopback, then press

(Enter) .

DSU LOOP (G64KC)

REQ REMOTE LOOP

25

I-DSL128 USER’S MANUAL

Step 4 The DSU loopback is executed successfully when the LCD shows ”REQUEST OK!!” and the Loop LED is turned on.

Otherwise, the LCD shows “REQUEST FAIL!!” and the Loop

LED is off.

Step 5

DSU LOOP (G64KC)

REQUEST OK!!

DSU LOOP (G64KC)

REQUEST FAIL!!

Use (Left arrow) or (Right arrow) to choose “REQ REM

RELEASE” to request the remote CSU loopback release, then press (Enter) .

Step 6

DSU LOOP (G64KC)

REQ REM RELEASE

When the DSU loopback has been released successfully, the

LCD shows “REQ REM RELEASE” and Loop LED is off.

DSU LOOP (G64KC)

REM LOOP RELEASE

4.5.1.2 Disable and Enable DSU Loopback Function

Step 1 Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

Step 2

Step 3

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “DSU

LOOPBACK V.54 (G64KC)”, then press (Enter) .

DSU LOOPBACK

V.54(G64KC)

Use (Left arrow) or (Right arrow) to choose “DISABLE” for disabling CSU loopback function or “ENABLE” for enabling

CSU loopback function, then press (Enter) .

DSU LOOP (G64KC)

DISABLE

DSU LOOP (G64KC)

ENABLE

26

I-DSL128 USER’S MANUAL

4.6 2047 BERT

There is one built-in 2047 BERT test pattern generator and receiver in each DTE port of the I-DSL128. You can easily use the testing mechanism and other loopback functions to check the status of system itself, the DSL and the remote equipment

(Figure 11,12,13).

Note: The 2047 BERT function is not available under the following conditions.

z

Time slot you wish to use occupied by Digital Loopback test.

z

Time slot you wish to use occupied by CSU loopback test initiated from remote site.

z

DTE port you wish to use occupied by DSU loopback test initiated from remote site.

When 2047 BERT function is activated, the BERT LED is turned on, the assigned DTE port off and the timer activated. Users may check the RUN TIME and BIT ERR results on the LCD. z

RUN TIME: The elapsed time with range from 0 to 65535 seconds. If results are out of this range, a ”+” sign appears to the left of the digits. z

BIT ERR: The error bit count with range from 0 to 65535 bits. If results are out of this range, a ”+” sign appears to the left of the digits. For each bit error, the counter will add one and the ERR LED will blink. If the bit errors are too numerous to synchronize the 2047 BERT pattern, or there is no data input, the

BIT ERR will display “NO SYNC” and the bit error counter will stop counting.

TD

RD

DTE

Local Site

2047 GEN

2047 RCV

Local

Loopback

&

2047 BERT

Line Interface

Digital Interface

Remote Site

Figure 11 Local Loopback & 2047 BERT

TD

RD

DTE

27

I-DSL128 USER’S MANUAL

TD

RD

DTE

TD

RD

DTE

2047 GEN

2047 RCV

2047 GEN

2047 RCV

DTE-A or

DTE-B

Local Site (LT)

Figure 12 CSU Loopback & 2047 BERT

Local Site eoc CSU

Loopback

&

2047 BERT

B1 or B2 or 2B+D

Line Interface

Digital Interface

V.54 DSU

Loopback

&

2047 BERT

Line Interface

Digital Interface

Remote Site (NT)

Remote Site

DTE-A or

DTE-B

Figure 13 DSU Loopback & 2047 BERT

4.6.1 To Execute 2047 BERT

Step 1

TD

RD

DTE

TD

RD

DTE

Enter ”DEVICE DIAGNOSTIC” screen, then press (Enter)

Step 2

DEVICE

DIAGNOSTIC

Use (Left arrow) or (Right arrow) to choose “BERT 2047

( G64KC )” , then press (Enter) .

28

I-DSL128 USER’S MANUAL

BERT 2047

( G64KC)

Step 3 Use (Left arrow) or (Right arrow) to choose “RUN”, then press

(Enter) .

Step 4

Step 5

Step 6

BERT 2047(G64KC)

STOP RUN RST

The 2047 BERT has executed successfully when the LCD shows as below. The RUN (SEC) counter should be increasing and the

BERT LED should be on.

RUN(SEC) : XXXXX

BIT ERR : XXXXX

Use (Left arrow) or (Right arrow) to choose “STOP” to stop counting or “RST” to reset counter, then press (Enter) .

BERT 2047(G64KC)

STOP RUN RST

IF you choose “STOP”, the counters will stop. If you choose

“RST”, the counters will reset to zero and begin counting again.

RUN(SEC) : XXXXX

BIT ERR : XXXXX

29

I-DSL128 USER’S MANUAL

Appendix A

Specifications:

Network

Line

Interface

DTE

Interface

Items Notes

Type

Full duplex with adaptive echo cancellation

Line coding

Line Type

2B1Q

Unconditioned twisted pair, 19-26 AWG

Surge Protection Meets FCC Part 68 Type A,B

Connector

RJ45

Number of Ports 1

Data Rate

Connector

Operation Range

Synchronous : 64Kbps

G.703 64K Co-Directional 4-wire twisted pair

2-wire mode

Up to 5.5Km over 26 AWG

Up to 7.0Km over 24 AWG

Meet ANSI T1.601 and ETSI ETR 080 standard loop

Clock Source

Diagnostic eoc

Internal

Line

G64KC

Fully detect EOC message defined by ANSI T1.601

Loopbacks

Local loopback

Digital loopback

ITU-T V.54 DTE loopback

ANSI T1.601 CSU loopback

2047 BERT

DTE-(G64KC)

Front Panel

Keypad

LED

4 operation keys ( Esc, Left arrow, Right arrow,

Enter)

7 status LED’s

PWR, SYNC, Loop, BERT, Data[Tx, Rx, ERR]

Power

Physical

Environment

LCD

AC Input

16 X 2 with backlight

90~264VAC, 47~63Hz

DC Input

18~60VDC

Consumption

>10VA

Dimensions

19.5X4.8X16.8 cm (W X H X D)

Mounting

Desk-top stackable

Temperature

0~50℃

Humidity

0%~95%RH (non-condensing)

EMI

Meets IEC CISPR22 Class A

Meets FCC Part 15 Subpart B Class A

30

I-DSL128 USER’S MANUAL

Appendix B

DSL Connector and Pin Designations

PIN

NUMBER

1

2

7

8

3

4

5

6

FUNCTION NOTES

No Connection Reserved for future standardization

No Connection Reserved for future standardization

No Connection Reserved for future standardization

Signal Tip or ring of pair to and from the network interface

Signal Tip or ring of pair to and from the network interface

No Connection Reserved for future standardization

No Connection Reserved for future standardization

No Connection Reserved for future standardization

Data Connector and Pin Designations

Signal

Function

Protective

Ground

Signal

Ground

Transmitted

Data

Received

Data

Pin Direction

4

10

8

3

11

1

9

Description

Ground

May be isolated from Signal Ground.

Common Signal Ground.

To I-DSL128 Serial Co-directional data from

DTE.

Fm I-DSL128 Serial Co-directional data at the output of the I-DSL128 receiver.

31

Transmission Units

CTC Union Technologies Co., Ltd.

Far Eastern Vienna Technology Center

(Neihu Technology Park)

8F, No.60, Zhouzi Street

Neihu, Taipei, Taiwan

Phone:(886) 2.2659.1021 Fax:(886) 2.2799.1355

E-mail: [email protected]

http://www.ctcu.com

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