Comtech EF Data SDM-300A - Manual (Page 315)

14–1
Chapter 14. 8-Channel
Multiplexer
14.1 Introduction
The multiplexer (MUX) system (Figure 14-1) provides for 1 to 8 tributary channels to be
multiplexed onto a single aggregate carrier. Independent tributary data rates from 600 bps
to 4000 kbps in 100 bps increments are supported. This option is used primarily with the
SDR-54A receiver, with the 8-channel Demux option installed.
The 8-Channel Mux PCB can be installed in the factory or in the field. This MUX PCB is
used in conjunction with a compatible I/O card to provide a 100-pin subminiature D style
connector located on the rear panel of the SDM-300A modem. Tributary and aggregate
data is available at this 100-pin connector. An optional breakout panel (UB-54) can be
used to provide eight separate 15-pin D connectors for individual tributary circuits and
one 15-pin D connector for auxiliary circuits.