Fibre optic monitoring and diagnostic system



Perform non-intrusive monitoring live fibre optic networks using both OTDR and Optical Spectrum Analysis in reat time.

  •  Simultaneous OTDR diagnostics of up to 8 fibres
  •  OSA monitoring of up to 8 fibres
  •  In-service fibre monitoring
  •  Can operate over dark fibre or over third party network
  •  Integrates with other PacketLight solutions
  •  Detection of fibre tapping attempts


PL-1000D consists of two technologies for non-intrusive monitoring live fibre optic networks. The OTDR locates fibre breaks by sending high powered diagnostic optical pulses into the fibre and creating Rayleigh back reflections. The returning signals are measured and calculated, accurately indicating the location and intensity of the fault. The OSA presents for each fibre the optical spectrum and the OSNR of each wavelength, providing the operator with a full, accurate and detailed picture of the fibre.

Live monitoring

The PL-1000D conducts full non-disruptive monitoring and analysis of the network’s fibre. The OTDR monitors up to 8 fibres simultaneously, identifying a break or degradation in each fibre and where the break is. The embedded OSA provides the full optical DWDM spectrum and OSNR of up to 8 fibres simultaneously. The solution provides high-level visibility of the fibre characterization and operating wavelengths and saves network managers time and OPEX expenses associated with identifying and repairing faults.

Spectrum Analyzer

Optical Spectrum Analysis display
Fig. 1 LightWatch OSNR display


Optical Signal to Noise Ratio (OSNR) is the critical measurement in determining the quality of fibre optic  links. The integrated Optical Spectrum Analyzer (OSA) contains a  1:8 optical switch with embedded splitters.  It supports full C-band, and  measures the power, frequency and Optical Signal to Noise Ratio (OSNR) of the optical channels in the fibre. 





OTDR graphical display
OTDR Graphical Display in LightWatch NMS


The PL1000D Optical Time Domain Reflectometer monitors up to 8 fibres simultaneously, instantly identifying any break or degradation in each fibre and where the break is. It integrates a 1:8 optical switch and OTDR.
■    30dB fibre loss
■    Embedded 1610nm OADMs
■    Accuracy 15m





Recommended for the following applications

■    Monitoring dark fibres service/infrastructure
■    Monitoring lighted DWDM fibres
■    In service OTDR measurements for DWDM networks
■    In service OSA measurements for DWDM networks
■    Detection of fibre tapping

Data Sheet


Item Description

Wavelength: 1610nm; Distance Range: 125Km; Dynamic Range: 30dB
Event Dead Zone: 5m
Loss Measurement Accuracy: ±0.1dB
Max Optical Output Power: 17dBm


Channel Spacing: 50GHz or 100GHz ITG grid
Frequency Window: C-band
Frequency Accuracy: ±0.1GHz
Slice Width: 0.3125GHz
Min Channel Width: 312.5MHz
Max Channel Width: 4.875THz
Input Channel Power (Pch): -35dBm – 0dBm
Channel Power Accuracy: ±0.5dBm

Network Management

Management Management:
Web browser over HTTP/HTTPS,
PacketLight LIghtWatchTM NMS/EMS, CLI over RS-232 or CLI over Telnet/SSH

Visual Indicators:

LED status indicators for Management and LAN ports, system Critical/Major/
Minor indicators, and Power Supply alarms

Software Upgrade

Hitless traffic - dual image

Power Supply

AC/DC: 90 to 246 VAC, 50/60 Hz,
-36 to -60 VDC, 60W max
PSU Redundancy: Single/dual feeding, hot swappable
Cooling Unit: Hot swappable fan unit

Operating Temperature

Operating Temperature:
-5ºC to 50ºC (+23ºF to +122ºF) operational


5% to 85% RH


1U: n 1.77” (H) x 17.32” (W) x 8.66” (D)
45mm (H) x 440mm (W) x 220mm (D)
Weight: 5.5kg / 12.1lb (max)
Mounting: 19”, ETSI and 23”

Approvals & Standards

NEBS ready

Ordering Information

Order Code Description
PA-PL-1000D Diagnostic device using OTDR to detect fibre quality and cut, and OSA for spectrum and OSNR analysis

More Information