ADTRAN 1200410L1, Руководство пользователя

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Chapter 5. Configuration Menu
61200410L1-1B ESU LT User Manual 45
Network Timing
The network is the source of timing. The received data
clocking is looped back to the network where it is used to
determine the transmission timing. This option is also
referred to as looped timed as the transmission clock is
derived from the received clock. See Figure 5-3.
Figure 5-3. Network Timed Clock Source
Internal Timing
The ESU LT is the source of timing. The ESU LT is configured
to use its own internal oscillator as the source of timing.
Applications include private line driver circuits where one
end is set to network and the other to internal.
See Figure 5-4
.
Figure 5-4. Internal Timing Clock Source