• O9500R-1
  • O9500R-2
SDH-SONET-MSTP Multiplexer

SDH - SONET Multiservice Access Multiplexer IMAP - O9500R

The Loop-O9500R SDH Multiplexer / SONET Multiplexer IMAP (Integrated Multi-Services Access Platform) is an economical STM-1/4/16 (OC-3/12/48) access multiplexer designed to provide integrated access to STM-1/4/16 (OC-3/12/48) optical lines.

  • Features
  • Applications
  • Downloads
  • Plug-in Cards

The Loop-O9500R SDH/SONET IMAP (Integrated Multi-Services Access Platform) is an economical, all-in-one solution for integrating various types of signals and transportation over various types of networks within one enclosure. Its universal roles and modular design make it effortless to perform traffic grooming for both peripheral and core networks by providing access interfaces, multiplexing, cross-connection, gateways, and transportation channels.

For access interfaces, 10+ low-speed modules are designed to encapsulate industry specific signals into DS0 timeslots. These interfaces include Voice (e.g. FXS, FXO, E&M, and etc.), Digital (e.g. RS232, RS449, X.21, and etc.), Teleprotection (e.g. G.703, C37.94) and so on.

For multiplexing and cross-connection, O9500R provides non-blocking cross-connection of up to 672 DS0 timeslots, which equal to 21 E1 channels, to serve as a MUX/DACS, and VC-n/VT-n fabric for SDH/SONET non-blocking cross-connection to serve as an ADM.

For transportation, high-speed modules provide transportation channels such as STM-1/4/16(OC-3/12/48) channels from Controller and B155/622 cards, Optical channels from 7-port FOM cards, E1/T1 channels from 63-port E1/T1 cards, and E3/T3 channels from 3-port E3/T3 cards.

For gateways, the signals from different interfaces can be freely encapsulated, cross-connected, and transported over a variety of transportation networks. For instance, E1/T1 and E3/T3 channels can be encapsulated into VT/VC paths and transported over SDH/SONET. Modules such as TDMoE and 8GESW make it possible for TDM traffic to be transported over Ethernet (DS0 over Ethernet) and the other way around (Ethernet over SDH/SONET) via circuit emulation and virtual concatenation technologies. 

Multiple protection schemes are designed at different levels, including path-level SNCP/UPSR and section-level MSP (1+1) for SDH/SONET, circuit and line protection for access interfaces, DS0 SNCP/UPSR and ULSR for low-speed modules, and 1+1 module redundancy for power, controller, and plug-in cards. Performance and fault are also monitored to ensure service integrity. Operation, Administration, Maintenance and Provisioning (OAM&P) functionalities are fully incorporated into the operation system. O9500R is fully compatible with Loop-iNET (EMS) and Loop-iNMS (Integrated NMS) to achieve centralized management for large scale networks.


  • 6U height, full front access (ETSI) shelf
  • TM, ADM and DCS (full cross-connect) at DS0, VC11, VC12, VC3, VC4
  • All modules hot-swappable
    • Controller (for aggregation and cross-connect)
      • Two STM-1/4/16 (OC-3/12/48) aggregate lines (CC16)
      • Two STM-1/4 (OC-3/12) aggregate lines (CC4)
      • Dual controllers for Cross-connect Unit Protection
    • Tributary Modules for access
      • Four High-speed modules (HS)
      • Six Low-Speed modules (LS)
    • Power Modules
      • DC Module (-48/-125/-250 Vdc)
      • Dual Power (1+1) Protection
  • Tributary protection
    • E1/T1: Card/Port (1:1) using Y-box, Line (1+1)
    • E3/T3: Line (1+1)
    • B155/622, B2G5: MSP, SNCP/UPSR
    • Ethernet: ELPS, ERPS
    • 8GE: Card protection
  • Ethernet Functions
    • Ethernet over SDH/SONET supports GFP, LAPS, VCAT, LCAS and non-LCAS
    • Port- and VLAN-associated E-Line and E-LAN
    • Alarm suppression, masking and reports
    • Ethernet Order Wire (EOW) using VoIP technology
  • Management
    • Console port: VT100 menu-driven
    • Ethernet port: VT100 menu-driven via Telnet/SSH
    • SDH/SONET DCC and DS0 in-band
    • SNMP-based NMS/EMS
    • Centralized management with Loop’s iNET/iNMS over DCC channel
      • Loop-iNET GUI EMS
      • Loop-iNMS with full FCAPS and end-to-end circuit
  • RoHS compliant

ADM, TM, and DACS Application

SNCP/ULSR Ring Protection at Circuit Level