BG> Yep, exactly the same here, except mine recognises BUSY after it has
BG> heard just two complete beeps. It also recognises the long single
BG> faulty tone as BUSY as well, after about 3 seconds. I was most
BG> impressed (and still am).

GA> That would be NU tone (Number Unobtainable). It means the number has
GA> been disconnected, not faulty.

OTOH some systems can be a bit cavalier about using NU when congestion
tone is intended.

--- PQWK202