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Timing Options
.
Site A
Timing Source
Channel
Timing Option:
Internal Timing
Host
Computer
Site A
Channel
Timing Source
Site A
Channel
Mux
Master
Timing Source
Figure D-7
076R155-000
Issue 7
SC 553
CSU/DSU
A. SC 553 CSU/DSU at Site A Supplies Timing
SC 553
CSU/DSU
Timing Option:
Channel Timing
(External/DTE Timing)
B. Customer Equipment at Site A Supplies Timing
SC 553
CSU/DSU
Timing Option:
Channel Timing
(External/DTE Timing)
C. Master/Slave Multiplexer Timing
Typical Back-To-Back Applications
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Typical Network Applications
Site B
Channel
SC 553
CSU/DSU
Timing Option:
Slave Timing
Site B
SC 553
Channel
CSU/DSU
Timing Option:
Slave Timing
Site B
Channel
SC 553
CSU/DSU
Timing Option:
Channel Timing
(External/DTE Timing)
Mux Loops Timing
Back to CSU/DSU
Mux
Slave
D-11
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