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T1 Transmit
NETWORK
INTERFACE
T1 Receive
61202156L2-1
Network Timed
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 loop timed as the trans-
mission clock is derived from the received clock. See
Figure 5-4.
INTERNAL
OSCILLATOR
BASE Nx56/64
DTE CLOCK
Figure 5-4. Network Timed Clock Source
TDU 120e User Manual
Chapter 5. Configuration Menu
SECONDARY
INTERFACE
OPTION CARD
BASE DS-1
PBX
5-7
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