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Chapter 5. Configuration Menu
5-12 TDU 120e User Manual 61202156L2-1
Normal (CSU) Timing
The typical timing option arrangement is shown in
Figure 5-9. The PBX is looped timed sending data to
the TDU 120e which is actually synchronous to the
received data. The Network Interface (NI) is the
actual source of all timings. This timing option is the
same as that typically used for CSUs. It works
equally well when the PBX is the source of timing. In
that configuration the network would not be provid-
ing timing.
Figure 5-9. Normal (CSU)
INTERNAL
OSCILLATOR
SECONDARY
INTERFACE
OPTION CARD
NETWORK
INTERFACE
BASE Nx56/64
BASE DS-1
PBX 2
DTE CLOCK
T1 Transmit
T1 Receive
PBX 1
The network interface and secondary interface clocking options are set by
using the Network (NI) Configuration menu options.