Chapter 5. Configuration Menu

Base DS-1

The PBX is the source of timing. The TDU 120e uses the clock derived by the Base DS-1 interface for transmission timing. See Figure 5-5.

T1 Transmit

NETWORK

INTERFACE

INTERNAL

OSCILLATOR

SECONDARY

INTERFACE

OPTION CARD

T1 Receive

BASE Nx56/64

BASE DS-1

DTE CLOCK

PBX

Figure 5-5. Base DS-1 Timed Clock Source

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TDU 120e User Manual

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ADTRAN TDU 120e user manual Base DS-1 Timed Clock Source