MRC MCX-5000 Series, Manual

Page: 42 / 220

MARINE RADIO CO.,LTD.
주
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선박무선
Subject : Auto Exchanger Page : (41 / 46)
Date : 2010.10.13 Doc. : MCX-5000S_ENG_R1
(QAS-ADD-008/1/10.10.13) manual\pabx\mcx-5000S\MCX-5000S_eng.doc
( MARINE RADIO CO., LTD.) MRC
2.4 Trunk Board
Trunk board has four trunk ports and four subscriber ports. First, the ring signal inputted in
trunk line is detected by a ring detector and carried to CPU via MUX. Next, CPU sends the signal
via DEMUX to connect trunk line to matching trans. Then, the ring signal is disconnected and
a matching transformer connects the voice signal to one of speech lines in cross point SW.
2.5 I/O Switch Board
The I/O SW board accepts eight subscriber ports. If your pick up the handset from the terminal, the signal is
detected by hang up detector and carried to CPU via MUX. CPU connects a subscriber line to the speech line
in cross point SW. And then, a call is available. If the ring signal is sent, the demux is decoded by the address
and control signal and carried to the ring signal. Then, the call signal is sent and other party can hear it.