The number kept saying not in service or a busy signal.

The next time, I hope she gets a busy signal.

Most of the time all I get is a busy signal.

I tried to call the police but got a busy signal after the first three numbers.

So far, though, the industry is getting a busy signal.

The other half got busy signals, wrong numbers or no answer at all.

"All last night and this morning I had a busy signal."

After getting several busy signals, I got through to the station.

Whatever happened to getting a busy signal and calling back when the line is free?

The last time we tried this, there had been a busy signal.