STM-1 Monitoring Groomer, Hi-Z Non-Intrusive Hi-Impedance
STM-1 Monitoring Solution

Product Overview

Aries Telecom offers the VCL-STM-1 Monitoring Groomer is a cost-effective monitoring and grooming equipment which may be used to "non-intrusively" monitor "bi-directional" STM-1 links through a 80:20 optical splitter patch panel and allow the user to select 64Kbps time-slots and groom them to E1 output ports, which may be then connected to E1 probes, E1 signaling analyzers and billing servers etc.

The equipment provides as many as 32 E1 output ports to which the selected / groomed 64Kbps time-slots may be output.

The figure shown below, illustrates a typical "non-intrusive", bi-directional monitoring application of an STM-1 link in both east and west directions and the groomed time-slots are output to E1 interfaces.

Download Data Sheet of Monitoring Groomer Solution - Data Sheet PDF (128 KB)

  Note: The Optical signal is "tapped" through an optical patch panel using a 80:20 optical signal splitter.



  • Single box solution - capable of "monitoring" a bi-directional STM-1 optical link and "grooming" the selected 64 Kbps, DS-O time-slots to output E1 Ports

  • Compact size

  • Integrated optical amplifier

  • Modular

  • Easy to configure and manage

  • Remote access

  • Dual Power Supply Input

  • Dual Power Supplies (Dual -48V DC operation)

Ordering Part Number



Product Description

STM-1 Monitoring Groomer: Hi-Z Non-Intrusive Hi-Impedance STM-1 Monitoring Solution

Additional solutions offered and available for Hi-z Non-Intrusive Monitoring applications are:

Technical Specifications


STM-1 Input Interfaces


Maximum number of STM-1o Inputs

2 (for bi-directional monitoring)

Type of STM-1 signal input

1310nm or 1550 nm (ITU-T G.957 compliant)

Minimum STM-1 Input signal


STM-1 Interface(s)

SFP - LC connector


E1 Output Interfaces


E1 interface outputs






Bit rate

2048kbps 50ppm



Nominal Impedance

120 ohms balanced

Peak Voltage of a mark
For 120 ohms balanced interface

3.0 V 0.3 V

Peak Voltage of a space
For 120 ohms balanced interface

0 V 0.3 V

Nominal Pulse Width


Pulse Mask

As per CCITT rec. G.703


Power Supply


Power Input

-48V DC nominal, -36V to 60V DC range

Power consumption

Less than 60 Watts

Maximum current consumption

1.25 Amps @ - 48 V DC


Timing & Synchronization

  • Loop Timed (clock derived from STM-1 input signal) on Port A or Port B

  • Internal Clock

  • External Clock (120 Ohms Impedance)

  • Timing & Synchronization of System (as per ITU-T G. 813)

  • Internal and External Timing interfaces

  • Two E1 BITS interfaces (as per ITU-T G.703)

  • Internal oscillator capable of supplying a ITU-T G.813 compliant Stratum-3 SEC Support of SSM byte


  • RS232 Serial (COM) Interface

  • 10/100 Base-T/RJ-45 management interface

  • Alarm Indicators and External Alarm Outputs



Operating Temperature

0 to 50C

Relative Humidity

10% to 90%, non-condensing


Mechanical Specifications



133 mm


477 mm


260 mm


8.5 Kg


Others Links

Technical specifications are subject to change without notice.
All brand names and trademarks are the property of their respective owners.


STM-1 Monitoring Groomer Solution - Data Sheet PDF (128 KB)

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    :: Application Diagram ::

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Aries Telecom and Trading Corp.
PO Box 85680, Al-Jazeera Al-Hamra, Ras Al Khaimah, U.A.E.
Ph: +971 56 136 1308, Fax:  +971 43 631 147