SDH/SONET Integrated Multi-Services Access Platform


  • 5U height, full front access (ETSI) shelf
  • ADM, TM, and cross-connect
  • Single STM-1/4 (OC-3/12) optical ring uplinks
    • Up to four STM-1/4 (OC-3/12) aggregate lines that are software configurable
    • Non-blocking N x 64 Kbps for 252 E1 or 336 T1 for data and voice channel transmission for uplink site
    • Non-blocking N x 64 Kbps for maximum 64 E1 or 52 T1 for data and voice channel transmission for tributary site
  • Tributary modules (see Table 1 next page)
  • Power Modules:
    • DC Module: (-48Vdc, -24Vdc, -125Vdc)
    • Dual Power: (1+1) Protection
  • SSM and CLK hold over function (SDH/SONET and E1/T1)
  • Controller protection:
    • MSP (1+1) or SNCP for single controllers
    • MSP (1+1) and SNCP for dual controllers
  • Per chassis supports single SDH or SONET Ring only
  • A-law to μ-law conversion
  • Alarm in/out, clock in/out
  • Compatible to a SNMP based GUI network management system and supported by LoopView and Loop iNMS
  • SSH V2
  • SNMP V1 and V3
  • RoHS compliance


How to Order
Panel Illustrations
Application Notes
Application Drawings
Detailed Printable Data Sheet

PDH,SDH,SONET, IP network Application
Typical Application, Click to Enlarge


The Loop-O9550 SDH/SONET IMAP (Integrated Multi-Service Access Platform) is an economical STM-1/4 (OC-3/12) access multiplexer. It is designed to combine digital access interfaces, including TDM, IP, and voice interfaces into STM-1/4 (OC-3/12) optical lines for convenient transport and switching.

This unit is a full cross-connect; one or more of the WAN ports can be used as a Drop & Insert function with fractional E1/T1 lines, which can be muxed into a full E1/T1 line.

The O9550 provides two optical line signals at STM-1 (OC-3) or STM-4 (OC-12) with protection schemes including MSP (1+1) and SNCP protection in both ring and linear network topologies. Redundancy is available in dual CPU controllers and power supply options, making the O9550 an excellent fit for critical applications. The chassis does not need or contain fan cooling, though an external fan tray is available.

The O9550 supports local control and diagnostics by using by using a VT-100 terminal connected to the console port. The O9550 also supports Ethernet, Telnet, SSH and SNMP so that it can also be controlled and diagnosed from remote locations. An in-band management channel with GUI is available. LED indicators for all plug-in cards are also available.

General Specifications

For detailed information on the many interface cards available for this product, please click here to download the 19 page printable data sheet.

Available Interface Cards. Card Details are available on the detailed pritable data sheet.

Mini-Slot Cards plug into the mini-slots

Single-Slot Cards use a single full size slot

Dual-Slot cards use two full size slots

Typical Front Panel

Application Notes

Application Illustration

ULSR RIng Application

The O9550 can be configured as either a Terminal Multiplexer (TM), a Linear Add/Drop Multiplexer (ADM), or as a cross-connect (DACS) within the same enclosure. The Loop-O9550 can easily provide an economical, well-protected transmission path and integrated access in various applications as an Integrated Multi-Service Access PLatform with full cross-connect capabilities.

Ordering Information

Pricing: The price point of this versatile product is surprisingly low. Please call our toll free number: 800-432-2638 for pricing and additional ordering information.

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