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Chapter 5. Configuration Menu
T1 Transmit
NETWORK
INTERFACE
T1 Receive
5-10
Internal Timing
The TDU 120e is the source of timing. The TDU 120e
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 5-7.
INTERNAL
OSCILLATOR
BASE Nx56/64
DTE CLOCK
TDU 120e User Manual
BASE DS-1
PBX
Figure 5-7. Internal Clock Source
SECONDARY
INTERFACE
OPTION CARD
61202156L2-1
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