Internal Timing; Figure 5-5. Internal Clock Source - ADTRAN ESU 120e User Manual

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
61200420L1-1
OSC
Network
Interface
Nx56/64
DTE CLOCK
DTE

Figure 5-5. Internal Clock Source

ESU 120e User Manual
Chapter 5. Configuration Menu
(OPTION)
Drop Port
PBX
5-9