STM SDH
STM-1 Optical to STM-1 Electrical Converter

VCL Products > STM/SDH Multiplexer > STM-1 Optical to STM-1 Electrical Converter
STM-1 Optical to STM-1 Electrical Converter

STM-1 Optical to STM-1 Electrical Converter

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Valiant Communications offers STM-1 Optical to STM-1 Electrical converter provides a simple and cost-effective conversion between STM-1 optical interface and STM-1 electrical interface. STM-1 Optical to STM-1 Electrical converter is an interface conversion equipment supplied with one STM-1 electrical (75 Ohms BNC) interface and one STM-1 optical (MSA compliant SFP) interface. 1+1, STM-1 Optical to STM-1 Electrical converter option is also offered and available. STM-1 Optical to STM-1 Electrical converter is a compact solution housed in a 1U high (44mm), 19-inch rack-mountable shelf, which can be installed in any DIN-standard 19-inch rack.

Features and Highlights

  • 1+0, STM-1 Optical to STM-1 Electrical converter version
  • Dual (1+1), STM-1 Optical to STM-1 Electrical converter version
  • Standard 75 BNC connector of the STM-1 electrical interface
  • Standard MSA compliant SFP optical interface. Allows installation of field removable / field upgradable optical SFPs
  • Short haul (1310nm), long haul (1550nm) and multi mode (850nm) optical SFP modules offered.
  • Offers multiple distance SFP options on the optical link 15KM, 40KM, 80KM, 120KM, 150KM, 200KM and 260KM.
  • High reliability, complies to ITU-T G.703 and G.957
  • Low power consumption
  • Supports local and remote loop-back on electrical or optical interfaces for system diagnostics.
  • Simple operation and maintenance.
  • 75 Ohms compliant with ITU-T G.703 and Telcordia GR-253 155Mbps electrical interfaces (BNC connector).
  • ITU-T G.783 compatible loss of signal detect.
  • STM-1 Electrical Interface - handles over 12.7dB of cable loss.
  • SFP - LC optical interface.
  • SFP with DDMI Interface - for read back of transmit and received optical power.
  • Class 1 laser safety.
  • Compliant with ITU-T G.957 STM-1.

Management options:

  • Serial RS232 Port (COM Port)
  • USB interface (COM Port)
  • 10/100 BaseT Ethernet Port allows the equipment to be remotely accessed using Telnet over a TCP-IP Network
  • SNMP V2 monitoring
  • Network Management System - Windows XP and Windows 7 compatible
  • Network Management System (NMS)

Alarms

  • LOS (Loss of Signal).
  • AIS (All Ones Alarm).
  • Optical Power Input High Alarm.
  • Optical Power Input Low Alarm.
  • SNMP V2 Traps.

Compliance

  • G.703: Provides one standard STM-1 electrical interface complying with G.703
  • G.707: Network node interface for the synchronous digital hierarchy (SDH)
  • G.781: Structure of Recommendations on equipment for the Synchronous Digital Hierarchy (SDH)
  • G.782: Types and characteristics of Synchronous Digital Hierarchy (SDH) equipment
  • G.783: Characteristics of Synchronous Digital Hierarchy (SDH) equipment functional blocks
  • G.813: Timing characteristics of SDH equipment slave clocks (SEC)
  • G.825: Control of Jitter and Wander within Digital Networks Which are Based on the Synchronous Digital Hierarchy (SDH)
  • G.957: Provides one standard STM-1 optical interface complying with G.957
  • G.958: Digital line systems based on the Synchronous digital hierarchy for use on optical fiber cables

Loop-backs

  • STM-1 Electrical local loop-back.
  • STM-1 Electrical remote loop-back.
  • STM-1 Optical local loop-back.
  • STM-1 Optical remote loop-back.

Security and Protection

  • Secured Access via SSH V2.
  • Password Protection: Password Protection in compliance with the mandatory clauses of the GR-815-CORE-2 specifications for secured access control.
  • Security Audit: All access logs for up to 30 days are maintained for security audit purposes.
  • Logging: Maintains a log of all successful and un-successful attempts. Logged information includes the ID and the IP address of the accessing entities. Alerts the administrator if the un-successful logging attempts exceed 5.

STM-1 Electrical Interface

Data Rate 155.52 Mbps
Standard ITU-T G.703 Compliant
Impendence 75 Ohms resistive
Peak to peak voltage (signal) 1 ± 0.1V
Rise time between 10% and 90% amplitudes of the measured steady state amplitude < 2 ns
Maximum Attenuation 12.7 dB at 78 Mhz
Jitter As per ITU-T G.825
Line Code CMI
Physical Connector BNC (Female)

Power Supply

Input voltage
  • Dual DC - 48V Inputs (range -18V DC ~ -72V DC)
  • Single AC 110V AC to 240V AC, 50 / 60 Hz Inputs
  • Single -48V DC (range -18V DC ~ -72V DC) Input.
Power consumption < 6 W (1+0 version)
< 8 W (1+1 version)

Mechanical Specifications

Rack Mounting Standard 19 Inch. DIN Rack
Height 42 mm.
Depth 125 mm.
Width 205 mm.
Weight 1.5 kg

STM-1 Optical Interface

Data Rate 155.52 Mbps
Standard ITU-T G.703 Compliant
Coding NRZ
Connector LC
Light source Laser Diode
Wave length options 850nm / 1310nm / 1550nm
Transmission Type Dual Fiber (standard) Single Fiber Bi-directional (optional)
Automatic Laser Shut Down Option Provided - User selectable option
Transmit power options - S 1.1 -11.5 dBm (1310nm)
Transmit power options - L 1.1 / L 1.2 -2.5 dBm (1310nm / 1550nm)
Receive sensitivity options - S 1.1 -31 dBm (1310nm)
Receive sensitivity options - L 1.1 / L 1.2 -34 dBm (1310nm) / -38 dBm (1550nm)
Receiver overload - S 1.1 -8 dBm (1310nm)
Receiver overload - L 1.1 / L 1.2 -10 dBm (1310nm / 1550nm)
Section loss - S 1.1 0 - 12 dB
Section loss - L 1.1 / L 1.2 10 - 28 dB
Automatic Laser Shut Down Option Provided - User selectable option

Environmental

Working temperature -50C ~ +500C for operation
Relative humidity < 90% (Non condensing)
Altitude Sea level to 5000 meters

Application Diagram



VCL-1400

Valiant Communications is an ISO 9001:2015, ISO 10001:2018, ISO 14001:2015, ISO 27001:2022 and ISO 45001:2018 certified equipment manufacturer.

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