[lstodd]

was well-known back in the day.

I even did morse ringtones per a caller for few frequent ones. Even if you don't read it by ear, they are very distinctive.

[simonebrunozzi]

Great idea!

[lstodd]

Thanks. Also consider using V.90 modem handshake sequence for alarms. It takes much dedication to sleep through "hrrr pshh ding dang pshh". GQ alarm samples also work.