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The TM4 fiber optic multiplexer is designed to transmit up to 4 T1 (DSX-1) or 4 E1 (G.703) circuits via optical fiber. With an embedded micro-controller, each channel of the TM4 can easily be configured and monitored through the Network Management Software (NMS). Configuration control includes LBO Settings, Line Code Selection, and AIS Enabling.

The TM4 ’s front panel provides LED status indicators, and audio disable push button controls, NMS communication ports. The rear panel provides AC and DC power inputs, E1/T1 channel connections, and relay contacts.

The management port provides complete system function access with a graphical user interface menu for channel configuration, test, alarm reporting, and status display. System performance monitoring including code violation per each individual data channel, and the system optical composite signal. Specific application optics provide the flexibility to meet any system requirements. These optics support multimode and singlemode fiber, and all major connector types. Transmission distances up to 10 Km via multimode and up to 50 Km via singlemode are possible. The TM4 may be configured with single or dual optics. The dual optic version provides automatic switch over in the event that a fault on the primary optical path is detected.

The TM4 is ideal for implementing simple trunking systems for premise, metropolitan, and industrial environments. Applications for the TM4 include PCS trunking, SCADA, ITS, railway networks, electrical utility networks, and cellular networks.