ADTRAN 1202156L1 Manuel d'utilisateur télécharger pdf (Page 65)

Chapter 5. Configuration Menu

61202156L1-1 TDU 120e User Manual 5-5

Based 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 5-3.

Figure 5-3. DS-1 Timed Clock Source

Base DTE Timing

The Base DTE is the source of timing. The TDU 120e uses the

incoming DTE clock to determine the transmission timing.

This is typically used in applications where it is necessary to

have the DTE as the primary clock source (such as limited

distance line drivers). See Figure 5-4.

Figure 5-4. Base DTE Timing Clock Source

DTE

OSC

(OPTION)

Network

Interface

T1 XMIT

T1 Receive

(DS1)

Nx56/64

DTE CLOCK

DS-1

PBX

DTE

OSC