Chapter 5. Configuration Menu61202129L1-1 TSU 120 User Manual 5-9Internal TimingThe TSU 120 is the source of timing. The TSU 120 is configuredto use its own internal oscillator as the source of timing. Appli-cations include private line driver circuits where one end is setto network and the other to internal. See Figure 5-5.Figure 5-5. Internal Clock SourceDTEOSC(OPTION)NetworkInterfaceT1 XMITT1 Receive( D S 1 )Nx56/64DTE CLOCKDSX-1PBX
