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CHAPTER 2 ND-71762 (E)
Page 16
Issue 2
GENERAL INFORMATION FOR CCIS
5.2 Office Rank
5.2.1 Source Office
The Source Office supplies clock pulses generated by the M-OSC in the self office to the PLO/OSC (High Precision
Oscillator) in the self office.
Figure 2-11 shows the clock supply routes.
Figure 2-11 Clock Supply Routes
M-OSC 0
M-OSC 1
ACT
Change
Clock
Synchronization
Two systems each
ACT
32.768 MHz
8 kHz (FH)
To Switch
System side
PLO 0
(PH-CK17)
/OSC 0
(PA-CK14)
PLO 1
(PH-CK17)
/OSC 1
(PA-CK14)
This figure shows an example of the clock supply routes when the PLO0 is in ACT side.
Note: For 1-IMG system, the OSC (PA-CK14) card is used. For 4-IMG system, PLO (PH-CK17) card is
used.