Chapter 5. Configuration Menu
61200420L1-1 ESU 120e User Manual 5-9
Internal Timing
The ESU 120e is the source of timing. The ESU 120e is configured
to use its own internal osc illator as the source of timi ng. Applica-
tions include private line driver circuits where one end is set to net-
work and the other to internal. See Figure 5-5.
Figure 5-5. Internal Clock Source
DTE
OSC
(OPTION)
Network
Interface
E1 XMIT
E1 Receive
Nx56/64
DTE CLOCK
Drop Port
PBX