CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 28)

28
Canoga Perkins
Customer's T1
CSU/DSU
PLL TX
OPTICS
RT TT FIFO CONTROL
WR R
FIFO
RD SD DI DO
ST X FIFO CONTROL
RD W
SD RD DO DI OPTICAL
RX
RT
FIBER
Enhanced 2240 with Extra Clock
NOTE 1: X equals the extra clock input pins on the enhanced interfaces.
"Extra clock" jumper would have to be ON at this 2240.
NOTE 2: Control lead crossovers are not shown for clarity.
NOTE 3: The 2240 in the diagram would be operating in Mode 7, with rate set
tomatch CSU / DSU speed. The 2240 at far end would be operating
inslave mode.
Figure 2-5.
Extra Clock Pins
in Tail Circuit
Application at
Clock Source End