Although slightly different from SMS gateway over Lightning
There is another really cool communication app called Sphinx
About this appSphinx Relay turns your Lightning node into a personal communication server. Messages are end-to-end encrypted and transmitted over the Bitcoin Lightning Network. Download Sphinx on your phone from
https://sphinx.chat and pair it with Sphinx Relay on Umbrel.
Communication between Sphinx Relay nodes takes place entirely on the Lightning Network, so it is decentralized, untraceable, and encrypted. Messages are encrypted using client public keys on the Sphinx app.
Back in the day when Bulk SMS spam was (is still) all the rage you could wire up a ASTERISK PaaS / open source framework for building communications applications for completely integrated communications over IP.
https://www.asterisk.org/products/software/I have not looked into this in any great detail BUT from what I recall about running Asterisk servers/instances is that it is incredibly robust.
It could be able to integrate with the LND network to broadcast Asterisk would act like a weirdly, freakish endpoint/gateway/middleware Hybrid type Concoction with a bit of fine tuning Sphinx could act as the front end and Asterisk could provide the platform as an alternative for SMS/MMS broadcast over the Blockchain.
There are probably better more elegant solutions out there that utilises the Lightning network that is already open-sourced & has either zero usage costs/ is free
or at greatly reduced cost (maybe drop to 1 sat/msg if you open up a channel size of 5,000,000 that's a lot of MMS)
**5mil Sat's Based on ~£1.7k @ BTC spot £34800 current prices #FoodForThought
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
FYI:
Signal Dockerized container -->
https://github.com/bbernhard/signal-cli-rest-apiI suspect there is a much simpler method to send MMS/SMS over LN - Bitcoin blockchain. Then again, I don't think Bitcoin would be the best network for this purpose as there are several other blockchain based projects which would be a much better fit for such a purpose as a MMS/SMS broadcasting messaging network.