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LinkTest™ DUAL


Overview

The GL’s LinkTest™ DUAL is a sophisticated bit error rate tester in a compact, hand held package with dual interfaces and a full color display. The unit can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU/DSUs, T1 CSUs, DTUs, NTUs and TIUs.

 
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The LinkTest™ DUAL can be controlled from the front panel or from the local or remote terminal. TheIt includes built-in LAN interface which allows the unit to be controlled remotely using TELNET or TFTP. andAlso included is RS232 console port that allows unit to be controlled (locally & remotely over a dial modem path) using VT100 interface or using command line interface.


Main Features

  • Tests asynchronous, synchronous, T1 and Fractional T1, E1 and Fractional E1, T3 E3 facilities and equipment
  • Interfaces V.35, RS232, RS422/RS530, X.21, HSSI, dual T1 E1, dual T3 E3 as standards
  • Data rates from 50 bps to 50 Mbps
  • Displays G.821 performance measurements
  • Command Line Interface control
  • Built-in LAN Interface for TELNET and TFTP
  • Generate and store reports useful for line turnovers, troubleshooting in the lab or diagnosing a communication line issue.
  • Can be controlled from the front panel, VT100 console, or from a local / remote terminal
  • Works on AC or battery power

Applications

LinkTest™ DUAL is designed to fulfill the requirements of a broad range of applications that may be used to test data communications equipment, networks, systems and line facilities. It simulates real data passing through a data communications link, and then determines the performance of a piece of equipment or that of a network. Many standard data patterns may be generated and recovered. The LinkTest™ DUAL can then monitors the data passing through the data communications link, and indicates line quality by comparing the data that has been received with the data that was known to have been transmitted.

Typical applications include,

  • Final test departments
  • Field installations of data communications equipment
  • Field evaluations of data communications equipment
  • Field monitoring of data communications facilities
  • Field problem isolation

LinkTest™ DUAL can test:

  • Async Mode - Tests asynchronous modems and CRT terminals
  • Sync Mode - Tests the customer interface on DDS, T-1 and T-3 CSU/DSUs, mux channels and synchronous modems
  • T-1 Mode – Tests T-1 lines, CSU/DSUs both short and long haul, T-1 mux and drops from T-3 muxes
  • E-1 Mode – Tests E-1 lines, NTUs and DTUs, E-1 mux and drops from T-3/E-3 mux
  • T-3 Mode – Tests T-3 lines and mux and T-1/E-1 channels on T-3 facilities
  • E-3 Mode – Tests E-3 lines and mux

Dual T1 and E1 Testing

In the T1 and E1 modes, the LinkTest™ DUAL

  • Displays Bit errors
  • Transmit and receive frequency
  • Test seconds, bit error rate and G.821 performance measurements
  • A variety of test patterns can be inserted in all or selected DS0s/Timeslots, continuous or non-contiguous, making the LinkTest™ DUAL ideal for fractional T1 E1 testing
  • With two T1/E1 framers, it can measure bit and frame slips as well as monitor and listen to both the TX and RX DS0s and Timeslots simultaneously
  • Also performs Drop/Insert (D/I) testing a single DS0 or Timeslot without interfering with the remaining ones

Dual T3 and E3 Testing

The LinkTest™ DUAL can test T3 and E3 networks and CSUs. It performs

  • G.821 measurements and displays bit errors, bit error rate, frequency and more.
  • With the dual T3/E3 TX and RX framers and codecs, it can monitor both sides of the line and hence listen to voice on a DS0 or Timeslot on a channelized T3/E3

Asynchronous and Synchronous Testing

In an async and sync test mode, the LinkTest™ DUAL generates test data in a choice of patterns and formats.

  • Generates test data in a choice of patterns and formats
  • Users can choose from twenty-eight async and seventy-five sync test speeds
  • Displays bit errors, bit error rate, and total test seconds
  • In the async mode, it also displays characters received, character errors and erred seconds
  • In the sync mode, it also displays TX frequency, RX frequency, CTS delay, G.821 measurements and more

Remote Operation

LAN Interface

The built-in LAN interface in the LinkTest™ DUAL can be used to –

  • Connect the unit directly to a PC or add to an existing LAN network to TELNET
  • Download new firmware to the LinkTest™ DUAL unit using TFTP
  • Upload a report to a PC using TFTP

Console Port – VT100 Interface

The LinkTest™ DUAL includes a serial RS232 Console Port which can be used as a VT100 port or a Command Line Interface. A console cable can be used to connect the LinkTest™ DUAL locally to a laptop. The serial port has modem control signals so that an external modem can be attached to the LinkTest™ DUAL for remote access. This path is password protected.


Specifications



T1
Framing Framed or Unframed
Speed 1,544,000 bps
Displays Bit Errors, Bit Error Rate, RX Level Volts/dB, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, Signaling Bits, Density Errs, Frame Errors, CRC Error, BPV Error, Slips, Round Trip Delay
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, D4, ESF, AMI, B8ZS and Yellow
Line 2: Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, D4, ESF, AMI, B8ZS and Yellow
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, 3 of 24, T1 DALY, T1 DALY UF, 55 Octet,55 Octet UF, Alt, Mark, Space , Digi mwatt, User 3 - 32, Round Trip Delay, DDS OCU Loop, DDS CSU Loop and DDS DSU Loop
Loops Self-Test, ATT Loop U/D, ANSI Loop U/D, ATT Payload, ANSI Payload, Smart Jack 1 & 2 (Framed & Unframed) and V.54
Interfaces Dual DS1 BiPolar, 110 Ohm, AMI/B8ZS Coding Physical: RJ48C & dual bantam


T1 on T3
Framing Framed or Unframed
Speed 44,736,000 bps
Displays Bit Errors, Bit Error Rate, T-3 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, P-Bit Errs, C-Bit Errs, T3 & T2 Frame Errs, LCV Error, FEBE Error, Excessive 0s and LOS Secs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, LOF, LCV, FEBE, Yellow, M13 and C-Bit
Line 2: Frame Lock, AIS (Blue), RLOS, LOF, LCV, FEBE, Yellow, M13 and C-Bit
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1111, IDLE 1100, AIS 1010, 0000, 1 of 8 and User 3 - 32
Loops Self-Test, T1 CSU, T3 Chan and V.54
Interfaces Dual DS3 BiPolar, 75 Ohm Physical: Dual Mini WECo 560Abantam


T3 Unchannelized
Framing Framed or Unframed
Speed 44,736,000 bps
Displays Bit Errors, Bit Error Rate, T-3 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, P-Bit Errs, C-Bit Errs, T3 & T2 Frame Errs, LCV Error, FEBE Error, Excessive 0s and LOS Secs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, LOF, LCV, FEBE, Yellow, M13 and C-Bit
Line 2: Frame Lock, AIS (Blue), RLOS, LOF, LCV, FEBE, Yellow, M13 and C-Bit
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1111, IDLE 1100, AIS 1010, 0000, 1 of 8 and User 3 - 32
Loops Self-Test and CSU
Interfaces Dual DS3 BiPolar, 75 Ohm Physical: Dual Mini WECo 560A


E1
Framing Framed or Unframed
Speed 2,048,000 bps
Displays Bit Errors, Bit Error Rate, E-1 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, CRC Errs, BPV Errs and Frame Errs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Line 2: Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, 3 of 24, Alt, Mark, Space, Digimwatt and User 3 - 32
Loops Self-Test and V.54
Interfaces Dual G.703/704, 75 & 120 Ohm, HDB3 Coding Physical: RJ48C & dual bantam


E1 on T3 (G.747)
Framing Framed or Unframed
Speed 44,736,000 bps
Displays Bit Errors, Bit Error Rate, T-3 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, CRC Errs, BPV Errs and Frame Errs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Line 2: Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, 3 of 24, Alt, Mark, Space, Digimwatt and User 3 - 32
Loops Self-Test and V.54
Interfaces Dual G.703/704, 75 & 120 Ohm, HDB3 Coding Physical: RJ48C & dual bantam


E1 on E3
Framing Framed or Unframed
Speed 34,368,000 bps
Displays Bit Errors, Bit Error Rate, E-3 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, CRC Errs, BPV Errs and Frame Errs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Line 2: Frame Lock, AIS (Blue), RLOS, CRC Error, BPV, DMFA and RRA
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, 3 of 24, Alt, Mark, Space, Digimwatt and User 3 – 32
Loops Self-Test and V.54
Interfaces Dual G.703/704, 75 & 120 Ohm, HDB3 Coding Physical: RJ48C & dual bantam


E3 Unchannelized
Framing Framed or Unframed
Speed 34,368,000 bps
Displays Bit Errors, Bit Error Rate, E-3 RX Level, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, LCVs, LOS Secs and Frame Errs
LEDS Line 1: Pattern Lock, Pattern Recovered, Frame Lock, AIS (Blue), RLOS, LOF, BPV, and RAI
Line 2: Frame Lock, AIS (Blue), RLOS, LOF, BPV, and RAI
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, Alt, Mark, Space and User 3 - 32
Loops Self-Test and LINE
Interfaces Dual G.703/751, 75 Ohm, HDB3 Coding Physical: Dual Mini WECo 560A


Sync
Speed 1,200 to 50,000,000 bps
Displays Bit Errors, Bit Error Rate, Test Secs, Erred Secs, Severely Erred Secs, Degraded Mins, Available, Unavailable, RX Freq, TX Freq, Bits Received, RTS Time, Round Trip Delay, and Elapsed Time
LEDS Pattern Lock, Pattern Recovered, Transmit Data, Receive Data, RTS (C), CTS, DSR, CD (I), DTR, TXC, RXC (S), and External TXC
Patterns 2^9 (511), 2^11 (2047), 2^15, ITU 2^15, QRSS, 2^20, ITU 2^20, 2^23, ITU 2^23, 1 of 8, 3 of 24, Alt, Mark, Space and Round Trip Delay
Loops Self-Test and V.54
Interfaces V.35/DB25, RS530/DB25, RS422/DB25, RS232/DB25, X.21/DB15 and HSSI/50 pin


Async
Speed 50 to 115,000 bps
Displays Character Errors, Characters Received, Total Test Seconds, Erred Seconds, Round Trip Delay, and Elapsed Time
LEDS Pattern Lock, Pattern Recovered, TXD, RXD, RTS, CTS, DSR, CD, and DTR
Patterns 2^9 (511), 2^11 (2047), Binary, Fox Test, Mark and Space, Round Trip Delay
Loops Self-Test
Interfaces V.35, RS530, RS422 and RS232 Physical: DB 25 pin Female


Unit Specifications
LCD Display 35 x 21 character color LCD Display
LED Twenty-two LEDs
Switches Twelve momentary pushbuttons
Display (Up , Down, Left and Right Buttons)
Configure (Back and Select Buttons)
Shift Button
Page Button
Send Error and Loop Buttons
Start/Reset Button
Return Button
LAN Interface For TELNET and TFTP
Console Port RS232 interface with speeds of 9600 to 115200 bps, 8 data bits, 1 stop and no parity. Supports dial-in modems.
Power Switching Mode - inline
100 to 240 VAC, 50 to 60 Hz
12 AA Nickel Metal Hydride Batteries
7.2 Watts, 25 BTU/hr


Physical Dimensions
Dimension 8.75" (22.2 cm) H x 7.5" (19.1 cm) W x 4" (10.2 cm) D
Weight 4.4 lbs (1.81 kg)


Environmental
Operating Temperature 0 to 50 degrees C, 32 to 122 F
Relative Humidity 0% to 95%, non-condensing

Specifications subject to change without notice.


Application Notes


Buyer's Guide

Item No. Item Description
LTS003 LinkTest™ DUAL
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