NEC NEAX 2000 IPS - Page 272

– 256 – NWA-008841-001 Rev.5.0
90ch2002.fm
• If a D.C. voltage is supplied with the tone from the external tone source/announcement machine, a
transformer or coupling capacitor should be used as shown below.
Connecting External Tone Source/Announcement Machine Supplied with D.C.
TO PBX
TO COT
Ring
Tip
K
TRANSFORMER
SOURCE
CAPACITOR
SOURCE
TO COT
Tip
K
Ring
TO CONTROL CIRCUIT
FROM PN-DK00
2 µF
TO PBX
TO CONTROL CIRCUIT
FROM PN-DK00
CAPACITOR
2 µF
R
R
EXTERNAL TONE SOURCE/
EXTERNAL TONE SOURCE/
DC
VOLTAGE
SOURCE
DC
VOLTAGE
SOURCE
ANNOUNCEMENT MACHINE
ANNOUNCEMENT MACHINE
External Tone Source/Announcement Machine (DK/TNT/MP)