CTC Union MUX128, Installation And Operation Manual

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Chapter 1: Introduction
1
1.1 General
The
MUX128/2*64
Access Unit is used to multiplex two
G.703/64Kbps bit flows to one 128K Synchronous Data Port
or vice versa.
Referring to the Point-to-Point example below, no
additional bandwidth is available for synchronization.
Therefore, it is important that the transmission delay between
the two units be less than half of a 64Kbps cycle.
Figure 1-1: Point to point connection diagram
The delay between A CH 64K and B CH 64K should be
the same. Any delay may be manually nulled via DIP switch
settings. The delay may also be automatically detected while
in “Auto Delay” mode for automatic nulling. In either case,
for normal operation, the delay between channels must remain
fixed after setting.
Figure 1-2: Multiplex/De-multiplex Timing Diagram
1 2 3 4 5 6 7 8 9
1 3 5 7
2 4 6 8
128Kbps
data
A CH
B CH
64Kbps
64Kbps