ADTRAN ESU 120e user manual Internal Timing, Internal Clock Source

Chapter 5. Configuration Menu

Internal Timing

The ESU 120e is the source of timing. The ESU 120e is configured to use its own internal oscillator as the source of timing. Applica- tions include private line driver circuits where one end is set to net- work and the other to internal. See Figure 5-5.

E1 XMIT

E1 Receive

		OSC
Network
Interface			(OPTION)
		Nx56/64	Drop Port
	DTE CLOCK

DTEPBX

Figure 5-5. Internal Clock Source

61200420L1-1 ESU 120e User Manual 5-9