ADTRAN TSU 120, Руководство пользователя

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Chapter 1. Introduction
12
TSU 120 User Manual 61200.129L1-1
DSX-1 Timed
The PBX is the source of timing. The TSU 120 uses the
clock derived by the Base DSX-1 interface for trans-
mission timing (see Figure 1-5).
The Base DSX-1 source timing is restricted from use when a
secondary interface is used at the same time.
DTE
OSC
( O P T I O N )
Network
Interface
T1 XMIT
T1 Receive
( D S 1 )
Nx56/64
DTE CLOCK
DSX-1
PBX
Figure 1-5
DSX-1 Timed Clock Source