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Chapter 5. Configuration Menu
Normal (CSU) Timing
The typical timing option arrangement is shown in Figure 5-6. The
PBX is looped timed sending data to the ESU 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. This is the preferred mode for use
with a PBX application.
This timing mode works equally well when the PBX is the source of
timing. In that configuration the network would not be providing
timing.
E1 XMIT
E1 Receive
5-10
OSC
Network
Interface
(NI)
Nx56/64
DTE CLOCK
DTE
Figure 5-6. Normal (CSU)
The network interface and secondary interface clocking options
are set by using the Network (NI) Configuration menu options.
ESU 120e User Manual
Secondary
Interface
(SI)
(OPTI ON )
Drop Port
PBX
(IO PB)
PBX
61200420L1-1
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