(c) LAU (Line Amplifier Unit)
The Line Amplifier Unit consists of a power supply circuit for stations, transmitting and receiving circuits for voice signal, speech path switches, BGM switches and the dial data receiving circuits.
One unit accepts up to 4 stations. A maximum of 4 LAU's can be installed.
receiving | switch | switch | transmitting |
circuit | T | R | circuit |
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control signal |
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| BGM/AIIcall/Link |
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dial data in | dial |
| busy |
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out | receiver |
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(d)DSM (Power Supply Module)
The Power Supply Module consists of a power supply unit for the exchange and terminals for external input and output connections. This module is attached to the mother board with a connector and can be easily detached from the exchange.
AC in |
| 5V | |
power | 18V | ||
| |||
GND | supply | 24V | |
DC in | circuit | GND | |
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remote
BGM in
paging out
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