The 16-Port Dual Nx8-MUX is a modular TDM Multiplexer designed to support up to sixteen sub-channel ports from 1200bps to 38.4 Kbps in Async format and up to 64Kbps in Sync formats.

The unit is designed with a pair of composite ports with variable port rate from 8Kbps to 128 Kbps in 8k steps for maximum flexibility. The composite port data interface is software selectable to operate as RS-232, RS-530, V.35, RS-422/449 or X.21.

The dual composite architecture allows for the distribution of channels over two aggregate links of equal bandwidth. This permits the utilization of the 2X bandwidth either to achieve up to nearly 256 Kbps total bandwidth, or to allocate spare bandwidth for channel recovery in the event either link fails. For the latter configurations, channels may be assigned either high or low priority, which assures that high priority channels remain in service on the surviving link.

The sub-channel ports may be individually configured to support flow control of RTS to DCD on a port by port basis or no flow control. The ports also support individual RTS to CTS delays and external TXC timing for DCE to DCE crossover. The data interfaces are RS-232 on 16 ports. In addition, four of the user ports are software selectable to operate as RS-232, RS-530, V.35, RS-422/449 or X.21.

The Dual Nx8-MUX derives its timing from the external DCE attached to the composite port. Alternately, timing may be sourced by the Nx8-MUX in a direct cabled pair of multiplexers. When using dual composites, timing may be independently selected for each link.

The Dual Nx8-MUX utilizes four, quad-port interface cards, a main processor card and dual redundant power supply modules. This modular design facilitates future upgrades and allows the user to add user ports in 4-port increments. All cards are front load.

The management port allows local and remote configuration commands. Integral software design features allow configuration of a sub-channel without disrupting existing sub-channels. Network management features include channel and composite loop backs, and link down error reporting. All port parameters are set with an async terminal connected to the configuration port. Setup procedures are menu driven and all parameters are stored in memory that supports power outages.

The Dual Nx8-MUX has an internal power supply and operates from voltages of 85-264 VAC. The unit has redundant power supplies with system notification. The unit is 5-U high and is standalone or 19 inch rackmount.