Optimux®-1550, Optimux®-1551 and Optimux®-1553 terminal multiplexers deliver traditional PDH services over existing SDH/SONET networks. They combine the high capacity associated with SDH/SONET add-drop multiplexers (ADMs) with the simplicity and low cost of a terminal multiplexer, significantly reducing operating and capital expenses (Opex and Capex).

High capacity in a compact, plug-and-play unit

Optimux-155X products are designed to dramatically reduce capital and operating expenditures by combining the high capacity of SDH/SONET ADMs with the simplicity, low cost and small size of a terminal multiplexer. The half-19" 1U high Optimux-1550 provides connectivity for four E1 lines, or for four T1 lines. The 2U high Optimux-1551 provides connectivity for 63 E1 or 84 T1 lines, and the 1U high Optimux-1553 provides connectivity for three E3 or three T3 lines. The products comply with all SDH/SONET standards, and interface with existing SDH/SONET backbones through a single or redundant STM-1 or OC-3 interface. Carrier-class design

Designed for the rigorous requirements of carriers and service providers, Optimux-155X devices offer 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, hotswappable multiplexer card. 1+1 redundancy is also available for the STM-1/OC-3 main link (uni-directional 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 19" shelf while the Optimux-1553 occupies a 1U shelf. The Optimux-1550 units fit side-by-side on a 1U shelf.

Higher revenues at lower cost

The Optimux-155X devices allow service providers to extend their network towards 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-155X devices interface directly with the existing SDH/SONET TDM infrastructures and consolidate 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, Optimux-155X products require no training or expertise. As completely plug-and-play units, the products allow carriers to extend the benefits of SDH/SONET networks toward the customer premises or central office in a quick and inexpensive manner.

Typical applications

Optimux-155X products are especially suitable for extending SDH/SONET network services toward remote and suburban locations such as industrial areas and business parks. They are the ideal choice for delivering multiple E1/T1 or E3/T3 services. 

The Optimux-155X units can be deployed in point-to-point applications (Figure 1), connecting two sites over fiber, to distances of up to 80 km (50 miles). 

In Figure 2, a service provider uses Optimux-1550 and 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. Together with Optimux-XLE1 (for E3) or Optimux-T3/T3L (for T3), RAD’s Optimux- 1553 can be used to combine E1/T1 and E3/T3 services over a single STM-1 line.