muckypup
Well-Known Member
Just filling in the online application form for my ships radio licence and it's asking if I want a 'Selcall' number? Is this an MMSI number in a different name?
Steve
Steve
Selcall number?
- Thread starter muckypup
- Start date
hightech
Well-Known Member
Selcall is an old fashioned digital comms that is not used any more. Like an early version of DSC.
Hightech
Hightech
snowleopard
Well-Known Member
Also it was commercial only.
VicMallows
Well-Known Member
Surely, ANALOGUE? .... It sent tones just like your touch-tone telephone .... OK, semantics. /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif Long obsolete anyway.
Vic
Vic
steverow
Well-Known Member
No, Selcall was a series of Analogue DTMF tones sent by the transmitter which when Rx'd deactivated the squelch defeat on the receiver.
Widely used in land mobile radio during the seventies and eighties..along with CTCSS which did the same thing but used single sub-audible tones...still in use on PMR446.
DSC..is the same thing but sent as a stream of digital info...enabling much longer and more compex codes...and about 20 times more info to be sent in the same time of data burst.
MMSI number is all you require.
Steve.
Widely used in land mobile radio during the seventies and eighties..along with CTCSS which did the same thing but used single sub-audible tones...still in use on PMR446.
DSC..is the same thing but sent as a stream of digital info...enabling much longer and more compex codes...and about 20 times more info to be sent in the same time of data burst.
MMSI number is all you require.
Steve.
muckypup
Well-Known Member
ah.. I've said on the application form that I need a selcall number! Thought they ment an mmsi number. Hopefully it will not affect the application!
S.
S.
snowleopard
Well-Known Member
No. So did I. They just replied saying 'you can't have one' when they sent my licence.
