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STM-1 (Optical / Electrical) Add-Drop Multiplexer
(with upto 16 E1 & 4 Ethernet) SDH Equipment

Product Overview

AceCom offers STM-1 (Optical / Electrical), E1 and Ethernet Multi-Service SDH Transmission Unit is a modular platform unit with two 155.52Mbps optical / electrical interfaces, which may be used in a point-to-point, chain or ring application to provide an ultra-compact, cost effective and flexible multi-service platform.

Interface card options include the 8xE1 interface card (120 Ohms [RJ-45] and 75 Ohms [BNC]), 4x100BaseT Ethernet interface card (1 VCG, 4 Ports 1 Channel) and 4x100BaseT Ethernet interface card (4 VCG, 4 Ports 4 Channels) options along with Engineering Order Wire is available. The user removable / replaceable STM-1 Optical / Electrical interface option makes it easy to meet various and changing user requirements. Orion's STM-1, E1 and Ethernet over SDH Transmission Equipment provides full capability to cross-connect at E1 level between all tributaries.

The equipment can be used as Terminal Multiplexer (TM) or an Add-Drop-Multiplexer (ADM) to build a point-to-point, ring and chain (add-drop) transmission network.

Features and Highlights

  • 1U height, 19-Inch standard rack-mountable chassis

  • Service interfaces

    • 2 x STM-1 optical interfaces, MSA compliant SFP (pluggable) optical module (LC connector) based design, which supports onsite optical port replacement

    • 2 x STM-1 electrical interfaces, SFP electrical module (Mini BNC connector) Optional

    • Maximum 16 E1 interfaces compliant with ITU-T G.703 (8 E1 interfaces per card)

    • 120 Ohms E1 and 75 Ohms E1 interfaces options available

    • 4 x 10/100BaseT Ethernet (electric) interface

      10/100BaseT (FE) Ethernet Interface Options:

      • 4 Ports, 4 Channels (4 VCG), and

      • 4 Port 1 Channel (1 VCG)

    • 1x GigE (Gigabit) Ethernet interface Options

      • Optical GigE (Gigabit) Ethernet interface,

      • Electrical 1000BaseT (Gigabit) Ethernet Interface

  • Provides complete diagnostics facilities to the user for monitoring optical ports and provide reading of optical transmit power, optical receive power, laser temperature, bias current in voltage alarms etc.

  • Performance Monitoring and Alarms - Error counts for B1, B2, B3

  • Performance Analysis - Error Seconds (ES), Several Error Seconds (SES), Unavailable seconds (UAS), Higher Order Virtual Container - Remote Error Indication (HOVC-REI), Higher Order Virtual Container - Pointer Justification Event (HOVC-PJE)

  • Management and Maintenance interfaces

    • 10/100BaseT Ethernet management interface

    • RS232 serial management interface

    • Remote (Telnet) management interface

    • Windows XP based Graphical User Interface (GUI)

    • Windows 7 based Graphical User Interface (GUI)

    • SNMP V2 Monitoring

    • Engineering Order Wire (EOW) interface (RJ-11)

    • NMS (Network Management System) for monitoring multiple units from a single / central location

    Timing mode

    • Synchronization with STM-1 line timing

    • Synchronization with timing from any of the E1 interfaces (1-16 E1 tributary interfaces)

    • External timing source option - 120 Ohms 2MBps (External Bits Clock)

    • External timing source - 120 Ohms 2MHz (External TTL Clock) - Factory Configurable

    • Internal Clock - ITU-T G.813 internal oscillator (Stratum 3)

    • The timing source can be auto-switched according to default or operator programmed settings

  • Ethernet Standards Conformity

    • Generic Framing Procedure GFP-F compliant with ITU-T G.7041

    • VCAT compliant with ITU-T G.707 and LCAS compliant with ITU-T G.7042

    • Ethernet flow control on WAN port and LAN port

    • Large buffer size upto 410,000 bytes

    • Maximum Frame length (MTU size):1536 bytes with 4 port 1 channel (1 VCG) Ethernet Card

    • Maximum Frame length (MTU size):2036 bytes with 4 port 4 channel (4 VCG) Ethernet Card

    • Auto MID/MID-X for Ethernet Interfaces

    • Support 802.1Q based VLAN tagging (4 ports 1 channel (1 VCG) Ethernet Card only)

    • Support Port based VLAN tagging (4 ports 1 channel (1 VCG) Ethernet Card only)

    • Performance Analysis

      • All Received Packets

      • All Transmitted Packets

      • Received Dropped Packets

  • Supports 1+1 Line Protection and Automatic Protection Switching (APS) with less than 50ms recovery

  • Supports point-to-point, ring and chain topology (4 VCG card only)

  • Local management and network-based management via a unified platform

  • Supports Remote Power Down Detection and Auto Laser Shutdown

  • Supports STM-1 and E1 loop-back for troubleshooting

  • 850nm multi-Mode, 1310nm Single Mode and 1550nm Single Mode optical interface options offered

  • Ethernet mapping adopts GFP/VC-12 virtual concatenated technology; according with MSTP criterion

  • Provides Ethernet over SDH mapping through standard GFP and VC-12 virtual concatenation (VCAT)

  • Ethernet bandwidth can be adjusted by the user between 2MBps ~126 Mbps (VC-12 mapping)

  • Supports MAC Address list filtration, learning and updating function

  • Easy to operate

    Redundant power supply card options AC+DC, DC+DC and AC+AC

    • 110V AC - 240V AC (50/60 Hz) power options available

    • -48V DC power option available

    • -24V DC power option available

  • Power consumption less than 17W.

Alarm and Indicator Monitoring

  • Power Indicator

  • Current Status (integrity and activity) Indicator

  • Urgent Alarm Indicator

  • Minor Alarm Indicator

  • Optical Signal Loss Alarm Indicator

  • Remote Device Power-down Indicator

  • Ethernet Card Status Indicator

  • General Alarm Indicator for Ethernet Card (including Link-down of Ethernet Port)

  • Auto Laser Shutdown (ALS) Indicator

  • Engineering Order-Wire (EOW) Indicator

  • Ethernet Link Indicator

  • Ethernet Speed Indicator

  • E1 Card Status Indicator

  • Dry contact via 9-pin, D-type male connector

  • Buzzer Alarm

  • SNMP Diagnostic and Monitoring

Application Diagram

Point to point network application diagram

Chain network application diagram

Ring network application diagram

Products Links

Technical specifications are subject to change without notice.
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