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Analysis (T1/E1/T3/E3/OC-3/OC-12/STM-1/STM-4)
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Hand Portable Test Instruments
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.
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 |
| 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 and Erred Seconds |
| 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 |
| Loops |
Self-Test |
| Interfaces |
V.35, RS530, RS422 and RS232 Physical: DB 25 pin Female |
Unit Specifications
LCD Display
| LCD Display |
35 x 21 character color LCD Display |
LED
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
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
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