Hi @Andrew_Mc ,
The 570 is currently available but with the addition of the 750 and soon, the 755, I can't say that it will be available for an extended period of time.
Right now, the 700 series is not compatible with either modems or the sealevel devices. I do know that such enhancements have been brought to the attention of product management but there is no definite answer at this time.
I believe instead of modems, they might end up suggesting 3rd party gateways that will accept an e-mail and in turn transmit it on a phone line. This isn't tested or recommended, just trying to give you an idea:
No alternatives exist for the sealevel at this time but as I mentioned, it is being discussed.
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