We use a mix of PSTN and cellular modems for OOB connectivity at our managed sites, worldwide. The cellular modems are only certified/homologated in some countries (US, EU, a handful of Asia) and are more than double the price of PSTN modems, so for a lot of sites we only use the PSTN modem. The problem is, the modem that we use for non-US/EU (MultiTech MT9234ZBA) has gone EOS and I'm struggling to find a replacement that even comes close to reaching the number of countries that the MT9234ZBA was certified for.
Does anyone know of any PSTN modem that has global-ish certification? MultiTech doesn't have a replacement and neither does the vendor that we use for US/EU (US Robotics).
We're going to be in some really deep shit soon. Any leads would be much appreciated.
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