STM-1/OC-3 Terminal Multiplexer

• SDH/SONET terminal multiplexers connect lower rate PDH services over a single STM-1/OC-3 (155 Mbps) link
• Channelized STM-1/OC-3 main link with standard fiber optic (single mode, multimode and WDM) or coaxial interface
• Multiplexes up to 63 E1 channels or 84 T1 tributary lines
• Supports 1+1 unidirectional automatic protection switching (APS) on STM-1/OC-3 uplink, 1+1
• protection on DS1 or DS3 tributaries and power supply modules
• Provides a demarcation point between the carrier network and the customer network
• Includes SNMP agent, RS-232 and Ethernet management ports
• Configuration, service, performance, security, and fault management via ASCII terminal, Telnet or RADview network management systems
• Range up to 80 km (50 miles)
• Plug-and-play installation and operation
• Compact: 2U-high, 19-inch wide

• Cuts leased circuit costs and saves on costly ports on the SDH/SONET ADM by consolidating traffic at the edge of the network
  
• High capacity at a low cost
  
• Plug-and-play installation and operation reduces the need for advanced technical training and saves on installation and support time
  
• Eliminates cost, rack space and management complexity by integrating multiple user ports into a compact platform
  
• Carrier-class redundancy improves network quality of service and protects critical network traffic at all times

The Optimux-1551 STM-1/OC-3 terminal multiplexer delivers traditional PDH services over existing SDH or SONET networks. It combines the high capacity associated with SDH or SONET add/drop multiplexers (ADMs) with the simplicity and low cost of a terminal multiplexer, significantly reducing operating and capital expenses.

High capacity in a compact unit

The 2U-high Optimux-1551 provides connectivity for up to 63 E1 or 84 T1 lines. The product complies with all SDH/SONET standards, and interfaces with existing SDH or SONET backbones through a single or redundant STM-1, OC-3 or STS-3. The Optimux-1551 can be ordered with 21 x E1/28 x T1 channels, 42 x E1/ 56 x T1 channels or 63 x E1/ 84 x T1 channels.

Carrier-class design

Designed for the rigorous requirements of carriers and service providers, the Optimux-1551 SDH/SONET terminal multiplexer offers a high level of reliability and manageability. Hardware redundancy is designed into the system without the need for custom Y-cables or external devices. This 1+1 redundancy is provided for all user interfaces through an optional second, hot-swappable multiplexer card. 1+1 redundancy is also available for the STM-1/OC-3 main link (unidirectional APS/MSP) and power supply modules. This reliable platform maximizes uptime for mission-critical applications. A fully equipped Optimux-1551 fits in a single 2U-high 19-inch shelf.

Higher revenues at lower cost

The Optimux-1551 STM-1/OC-3 terminal multiplexer allows service providers to extend their network to remote customers, thereby enlarging their customer reach and increasing revenues, without the expenses associated with deploying high-end ADMs, which add unnecessary cost and complexity in “point to network” connections. Compared to the alternative of deploying PDH multiplexers at customer sites, the Optimux-1551 device interfaces directly with the existing SDH/SONET TDM infrastructure and consolidates traffic at the edge of the network. This enables service providers to save the cost of fiber deployment and of multiple ports on the ADM.

Plug-and-play operation

Easy to install, maintain and operate, the Optimux-1551 requires no training or expertise. A completely plug-and-play unit, the product allows carriers to extend the benefits of SDH/SONET networks to the customer premises or central office in a quick and inexpensive manner.

Extends SDH/SONET access up to 80 kilometers (50 miles)

Optimux-1551 STM-1/OC-3 terminal multiplexer is especially suitable for extending SDH/SONET network services to remote and suburban locations such as industrial areas and business parks. It is the ideal choice for delivering multiple E1/T1 services. The Optimux-1551 can be deployed in point-to-point applications (Figure 1), connecting two sites over fiber, to distances of up to 80 kilometers (50 miles).

In Figure 2, a service provider uses Optimux-1551 to deliver E1/T1 services and Internet access to multiple customers, and uses Optimux-1553 to provide E3/T3 lines to large enterprises with higher bandwidth requirements.