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AD-25182501CHAPTER 3
Page 100
Revision 1.0.1
NAP- 200-007
Sheet 37/42
Termination of Cables on MDF
External Music Equipment (continued)
• An AUSTEL-approved isolator must always be included between the Music Source and the PABX trunk.
• If a D.C. voltage is supplied together with the audio from the external music equipment, a coupling capacitor
must be added as shown in Figure 007-22. It is not
recommended to mount this capacitor on the MDF, so it
should be added to the output cable of the music equipment.
Figure 007-22: Connecting Method of Music Source with D.C. Offset
CAPACITOR
SOURCE
TO COT
B
GND
A
TO CONTROL CIRCUIT
FROM PN-DK00 (OPTIONAL)
2 µF
TO PABX
ISOLATOR
-27V
DC
OFFSET
_
+