If it's a beeping noise, what's happening is that someone has mistakenly entered your number in to a fax machine. It's a "wrong number", but a fax machine is usually set up to try three or four times before giving up, in case the first few times the line is busy (a fax machine can't tell between a wrong number and a busy signal).
I suggest you try calling this number and advising that their fax machine has been phoning you, to give them your number, and ask them to make sure they correct their files in case their number is wrong on the fax cover.
This appears to be a call from the Calgary Health Region. It appeared on my phone when a Calgary hospital tried to contact me. This should be a safe number.
Received my third call from this number and picked it up this time. It was the CHR doing a survey. I told them that I was not interested and to remove my number from their list. Caller replied that she would remove my number from her list, but that is all that she had access to.
Two calls tonight, no one on other end but line is open. I had a recent surgery and wonder what this might be. Yes, it is Calgary Health Region and when you call back it says "unable to ID area trying to reach you or yu may call area you have been dealing with". I will follow up during business hours.
I've received about 8 of these calls in the last couple of weeks but they never leave a message. Glad to hear it's probably just someone from the CHR just doing a survey.