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Old 30-04-2019, 01:54   #1
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Icom IC-M423 MMSI change

Due to flag change, we need to change VHF's MMSI. Any way to DIY on Icom IC-M423? Sending it somewhere via post and paying for a such a "job" is not economically feasible. This was purchased in EU, so US regulations should not be applicable and a single MMSI is restriction of my ownership rights.
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Old 30-04-2019, 02:03   #2
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Re: Icom IC-M423 MMSI change

Some other threads have talked about this so do a search. In any case, when we re-registered our boat we had to remove the M423 and send it to the local ICOM dealer to change the programmed MMSI. First time MMSI programming can be done by you during initial setup, but subsequent MMSI changes must be done with a special tool that only dealers can get. Any dealers local to you?
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Old 30-04-2019, 03:25   #3
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Re: Icom IC-M423 MMSI change

Thanks. It would not be economically feasible to send it to ICOM dealer. What a nonsense! Total waste of time and resources! I doubt ICOM with such restrictions is inline with EU laws. I just contacted VersperMarine with request to change MMSI on XB8000 and got reply in minutes with authorisation code. Job done in 15 minutes.


P.S. WTF it is possible to buy cables and programming software from third parties https://www.ebay.co.uk/itm/CS-M92D-M...-/301061155479
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Old 30-04-2019, 04:03   #4
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Re: Icom IC-M423 MMSI change

Anyone done this DIY? For IC-M423(G) according to this official document https://icomuk.co.uk/files/icom/PDF/...Guide_2018.pdf CS-M92D software and OPC-OPC-478/U/UC + OPC-980 cable are needed.

Anyone can share CS-M92D software?

Any idea if OPC-478 would be fine for IC-M423(G)? What U/UC means? For other models OPC-478UC is a must and in this case it looks like U or UC are optional.

Any idea about compatible one e.g.
https://www.aliexpress.com/item/USB-...OrigTitle=true

https://www.ebay.co.uk/p/USB-Cable-f...8uc/2109445964

https://www.ebay.com/itm/USB-Program...-/263899174690
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Old 30-04-2019, 11:13   #5
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Re: Icom IC-M423 MMSI change

If anyone has the software to share i would appreciate a PM.
Regards Dennis
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Old 30-04-2019, 12:18   #6
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Re: Icom IC-M423 MMSI change

Probably I will get OPC-478 from Ali or Ebay. For OPC-980 cable just Amphenol LTW Standard B connector, model: LTW BD-08BFFA-LL7001 ICOM OPC-980 clone cable adapter and then cut OPC-478 3.5mm jack off and connect directly to Amphenol LTW.

Please share CS-M92D software. PM.
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Old 01-05-2019, 02:57   #7
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Re: Icom IC-M423 MMSI change

More info on DIY of OPC-980 cable https://forums.iboats.com/forum/boat...-cable-adapter
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Old 18-06-2019, 10:35   #8
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Re: Icom IC-M423 MMSI change

MMSI changed. Products and information for DIY below.

> OPC-478 cable: https://www.aliexpress.com/item/2014...f-ac669edddd92

> OPC-478_PL-2303TA_Prolific drivers: https://mega.nz/#!Wygn1KSB!t6P75GhJA...2eEKCM7zmqUEe8

> OPC-478_PL-2303TA_Prolific cable test: https://mega.nz/#!GzInlCrY!1H3IHwwvz...C8WJWEcVaLPhkY

> OPC-980 to OPC-478 DIY: Amphenol Cable Mount Connector LTW BD-08BFFA-LL7001 https://uk.rs-online.com/web/p/indus...ectors/8114273 (to save $$$ possible to crimp small wire ferrules with longer endings and connect directly to unit pins)

> OPC-980 to OPC-478 DIY: Amphenol Cable Mount Connector LTW BD-08BFFA-LL7001 tech specifications https://mega.nz/#!a7ozEYiT!lF00R8qIw...Jha3nUX8p42NhI

> OPC-980 to OPC-478 DIY: Connection schematics https://mega.nz/#!HqgBFazK!QSbG8irIt...XPkRCR0pQHNOa4

> CS-M92D Software (Rev 1.3): https://mega.nz/#!zuJTmIhK!CTe9YTe57...gU0crHwXRyELcM

> Icom IC-M423/IC-M424 Service Manual: https://mega.nz/#!GnBXhASS!NU9DVNjWD...ZvJv1KW1ZLUzF8

> Icom Programming Software and Compatible Cable Guide: https://mega.nz/#!2mJBlYJK!VuAUFV6PE...LCr2akGsK4Ia_Q
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