Hi Gordon,
Look at
http://www.red-fone.com.
About the Daughter boards, that is true. I have lost a total of 03 of them in less than a year due to what I think is the voltage coming from the phone line, all FXO. But I never lost a gateway, and if I did, I wouldn't have to visit the client, open the machine and stop all the services and so on. Hence my preference for gateways and Channel Banks.
Things I can't do with gateways:
- Caller ID from the LDAP server. This is because gateways allow me to send the calls to predefined numbers, but not run custom apps.
- I ran into problems sending DTFM to certain types of media centers (Tivo, Xbox, etc.), where an FXS card sends fine.