Proxima, Libra firmware ver. 2.12.xx
rev. 2.12.01
The second FLASH function (the so-called analogue FLASH) – pressing this
button in the course of an external call results in a “short disconnection” of the
trunk line. In this way, the server sends the FLASH signal to the local exchange
(for some local exchanges this is a necessary signal to start using their additional
functions).
If you want to send the FLASH signal to the local exchange:
Press during an external call.
You may now use the additional functions offered by the local exchange.
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