The sounds were there all the time, you just needed to pick up the phone to hear it. The reason they played it over a loudspeaker to start with is so you could hear if somthing went wrong with the connection (busy signal, wrong number, a person picked up instead of a modem on the other end, etc).

The technical reason is that because modems work over phone lines, which are by and large used by human beings to make voice calls, it behooves us, in data communication equipment going over the voice network, to have an amplifier and speaker which monitor the audio signal on the line during connection establishment.


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Modern digital phone systems carry sound using a digital signal. In North America, the signal is at 56 kbit/s. This is the upper limit on modem signals traversing a digital switch in North America. Last I knew, European used a 64 kbit/s channel. I don't know if Modems in Europe are/were capable of carrying a 64 kbit/s modem signal.

I recently began working for a small family-run business where the Network admin had left abruptly, and I inherited his mess. Throughout the quest to fix the problems he left for me, there has been one issue that remains unsolved, and that is that all polycom 706 phones on the network will get a fast busy signal when dialing to an outbound line about 15% of the time. So while most calls go through, for no real obvious reason some won't. I have researched this extensively and tried everything from increasing the timeout for the UDP ports, to forcing the phones to register before making an outbound call.

long story short, there was a nationwide outage for landline phones for comcast business customers, and when they were resolving it they "inadvertantly" reset, and removed configurations for lines that were previously configured. Also, another fun fact, if you have analog lines, and they "threw in" voicemail on all the lines, and you never knew about it or used it, and over time there were enough opportunities to have someone leave a voicemail on that line (outages, trunks full, carrier screws all your settings up, etc) and once the mailbox fills you cannot dial out on it any longer.

How interesting. I never heard of talking between the busy signal but love how quickly teens picked up on it and used it to their advantage. It sounds like it was a true early pioneer of social networking.

I switched from AT&T POTS to U-verse Voice and internet a few weeks ago. Ever since then, my phone line has not been working properly. I hear from people (clients!) who tell me they tried calling and the line just rang and rang, but never went to my answering machine. On my end--no ringing at all, and no record of a missed call. And when I try to call out, sometimes I can, but sometimes it goes to a very fast busy signal. I also get disconnected in the middle of calls--and was just disconnected twice while on hold waiting for AT&T tech support, which is why I'm here typing this now. The orignial installer had a problem getting my phone to ring from his cell phone, but finally it did ring and he figured the issue was resolved. But it wasn't--the phone does ring sporadically when receiving calls. I called tech support and they sent out another tech, and he shrugged his shoulders and said, "The lines are working. I'll try replacing the modem." He replaced it, called, the phone did ring, and he said, "Well, we'll see if that's it." It wasn't. I called tech support again, and she told me the number on my account was "pending" until noon, yesterday, and that perhaps my issues would be resolved after that. They weren't. I tried calling tech support again earlier today, and was disconnected. She couldn't get through on my phone (because it didn't ring on my end) so called my cell, but I have terrible cell service in the house (also AT&T), and we got disconnected and she never called back. The only reason we got this servcie is because, bundled with Direct TV, it was cheaper than our old service, but I'm about to switch back to POTS, because I need a working telephone. Any ideas to resolve this would be very, very welcome.

It may be a problem with memory card. The busy sign usually shows up if there is a problem with communication with memory card. I have to say that quite a lot of people get "busy" signal in viewfinder e.g. after waking up the camera or not using it for a while.

Well, some UI rules show the busy signal only after X seconds of being busy. If it ends before that, no need of signalling. I thought something could be wrong with that, but at least that would clean itself up. This busy signal will last forever if I don't move the mouse.

We have repurposed a couple of 7912 phones and have them all set up. but when we deployed them, they will show User/Extension and shows caller id, but when user picks up to answer, there is a busy signal on the caller phone and nothing on the user phone! These phones were working prior to repurposing them. Any ideas?

I have update my Realtek audio driver in sound,video and game controllers section with a more recent one >> 6.0.9301.1 but it's not an official driver for the Dell R10 ....but it runs fine, never had a audio problem so far

The same down here in South Florida. In my youth back in the late 70s through at least the mid 80s, we would experience the exact same thing frequently. Whenever the Southern Bell 94x CO in North Miami Beach would give you a fast busy/reorder tone, you would be able to hear other people and talk to them during the fast busy tone. You can also hear people terminating their calls and others popping in at the same. Everyone can hear each other and talk to each other, too. Eventually, after a couple of minutes, the CO would drop you. Another glitch that I used to experience from that CO was after dialing a number, you would hear multiple parties all in conversation at the same time but not hearing the other parties in the conversation with no tone signal of any type in the background. They would not be able to hear me, either.

We never had a beep line that used the busy signal, but we used to call time and temperture, and in the 5 second lull before the message came on, we could do the same thing! No irritating beep, but you had to talk fast!

This is too funny. When ever I hear a busy signal, I think I have dialed the number wrong or something given that they are so rare in today's world. I do know exactly what one is though and remember the evolution of the phone for sure.

I remember when everybody had call waiting. I had it too. And then the thought occurred to me that I did not have to be instantly available all of the time and there was nothing wrong with a busy signal and, in fact, it was kind of rude to interrupt a conversation to take another call even if it was to say I'd call them back, so I got rid of call waiting.

My user is using bluetooth-Aftershokz headphones and he always gets an "on hold" signal, like a busy signal on a phone. Beeping every few seconds. As soon as I go back off mute it goes away. Any ideas? Super annoying when he is trying to listen but be on mute. This happens when Bluetooth is turned on but not when it is toggled off on the computer. Microsoft Teams Version 1.4.00.19572 (64-bit)


A flaw in the phone switching system allowed multiple people to dial into the same phone number and hear each other. An obnoxiously loud busy signal blared in the background, so kids would shout out phone numbers to call each other back. As soon as the phone company found out about a Jam Line, they would shut it down, but teens would find a new one, and the new Jam Line number would spread through the high schools like wildfire.

i just got my rogers home phone and internet servises transferred when i moved house, after the technicians left, my internet works and my phone gets a dial tone but whenever i try to call anyone it goes directly to busy signal.....same if anyone tries callingme...... can anyone help?


i cant call rogers in order to get another technician out here and i cant for the life of me find an email adsress for rogers tech support or whatever



The tech who installed evertything did have it plugged into 1/2 port already. I got someone from Live Chat who got me to check this. Suggested I try just using the wall jack till someone from further up the line got hold of me when hey got a ticket. That was 24 hours ago and nothing! I tried the wall jack and now the phone display says "check phone line" and no dial tone just a really fast busy signal sound before even dialing and I can't dial. It is plugged back into the original jack now.

Conceding the difficulty in this case of selecting the evidence most favorable to the plaintiff, we endeavor to state facts which the jury could have found. On Sunday evening, June 14, 1959, Mrs. Doyle was on duty as a switchboard operator at the company's headquarters in Roxbury. This was three days after the bombing of the North Station Metropolitan Transit Authority station which caused serious personal injuries and property damage, was widely reported in Boston newspapers, and led to many false bomb calls. About 6:03 P.M. she received a call over a two-party line in which a male voice said, "I want to report that the Dudley Street Station is going to be blown up tonight." The caller then hung up. The two subscribers on the line were H. E. Anderson, 6 Rosemary Street, Jamaica Plain, and Catherine M. Hutchinson, the plaintiff's mother, 26 Rosemary Street, Jamaica Plain. Mrs. Doyle immediately rang back both parties without receiving an answer. It was impossible for her to tell from which side of the line the call had come. She sought instructions from her supervisor who told her to request a trace of the call. This was the duty of the floor switchman, and the supervisor informed the Boston police that the trace was being made. Mrs. Doyle continued to receive calls. On Sunday evenings she averaged fifty calls an hour. She left the cord in the line, which procedure held it up so that it could not be used. Thereafter if anyone wanted to call out from that line, he would have to call through the operator, and anyone attempting to call in would get a busy signal. On the line while thus locked, she received calls inquiring if the line was out of order. One such call later turned out to have been by the plaintiff's brother, Arthur. Another happened to have been by Mrs. Anderson, who lived with her two daughters. e24fc04721

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