For anybody else wanting to do this, you'd be better off picking up a Grandstream 80X ATA. It supports pulse dialing, pulse to tone conversion, 'high power' rin

For anybody else wanting to do this, you'd be better off picking up a Grandstream 80X ATA. It supports pulse dialing, pulse to tone conversion, 'high power' ringing, and decently modern TLS. If you're good with a soldering iron and have a 3.3v TTL serial cable, you can also pick up really cheap used Vonage HT802s and 'unlock' them.