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Old 6th Sep 2020, 2:29 pm   #2
Graham G3ZVT
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Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,725
Default Re: My Smart-1 4 line looses programming

I looked at mine and can't find a battery or a supercap. Perhaps it is corrupt NVM that causes the processor to do a hard reset?

The only other thing is a "long star @ power-up" reset being performed, however unlikely.

Even when these were new, it could be a challenge to find a phone that sent continuous DTMF.
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