ADTRAN ESU 120e Manual

A SERVICE OF

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Chapter 5. Configuration Menu

5-10 ESU 120e User Manual 61200420L1-1

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.

Figure 5-6. Normal (CSU)

The network interface and secondary interface clocking options

are set by using the Network (NI) Configuration menu options.

DTE

OSC

Secondary

Interface

(SI)

(OPTION)

Network

Interface

(NI)

E1 XMIT

E1 Receive

Nx56/64

DTE CLOCK

Drop Port

PBX

(IO PB)

PBX