[mod.telecom] getting a busy signal at the wrong time

S.PAE@DEEP-THOUGHT.MIT.EDU (Philip A. Earnhardt) (07/04/86)

My home phone is in the (617) 354 exchange, and the modems at work are
in (617) 426. About 10% of the time when I call work, I get a fast busy 
signal on the line for about 2 seconds, then the modem answers the phone.
In other words, I get a fast busy when I should be getting a ringing sound!

Is there some reasonable explanation why I should be hearing the fast busy
or is something broken? If something is broken, who should I report it to?
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