ADTRAN 1202060L2-1, Руководство пользователя

Страница: 48 / 86

Chapter 5. Configuration Menu
5-4 TSU LT User Manual 61202060L2-1
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
DTE Timing
The DTE is the source of timing. The TSU LT uses the
incoming DTE clock to determine the transmission timing.
This is typically used in applications such as limited distance
line drivers, where it is necessary to have the DTE as the
primary clock source. See Figure 5-4.
Figure 5-4. DTE Clock Source