[SML] Telephone line simulator

[Nigel Worsley]

This reminds me, one of my lockdown projects is to design a phone
ringer for stage use (the day job is electronics design). What
features do people feel are missing from the existing affordable
solutions?

Already on the list is the ability to provide the right tones and
ringing frequencies for worldwide use and a USB port so it can be
triggered by show control software etc.

Nigel Worsley