Loud buzz on OBi110 line PSTN
Jon9999:
I get a very loud buzz whenever I connect through the OBi110 to the PSTN phone line. I'm not talking about an interference hum -- this is a loud buzzing noise, not a background sound. It's not a dial-tone-type buzz, but a continuous, loud raspberry sound.
If I try to make a call through the OBi by just dialing the number (with PSTN set as my primary service), as soon as the call tries to go through, I hear one ring (apparently generated by the OBi) and then the loud buzz starts.
If I just press # to bypass the OBi, the buzz starts immediately after I press #, instead of the dial tone.
I've tested the phone line by reconnecting the phone back to the telco jack directly, and there's nothing wrong there. The patch cables are also fine. I've also tried a full factory reset of the OBi110 without any difference.
My device is only two days old, and it was working yesterday.
ianobi:
Seems like you have tried most of the usual checks. I would double check / change the cord from the Line Port to the Telco jack.
OBi devices are quite robust. However, quite a few problems have been reported with their power supplies. Loud buzzing that only appears on an analogue circuit may indicate a faulty power supply. Change with a compatible one if you can.
It could be that you are simply unlucky and your Line Port is faulty on your OBi device. If so, then put in a support ticket. Obihai have a good record of replacing defective devices.
Jon9999:
> I would double check / change the cord from the Line Port to the Telco jack.
Double checked / changed. No difference.
> Loud buzzing that only appears on an analogue circuit may indicate a faulty power supply. Change with a compatible one if you can.
Changed. No difference.
> It could be that you are simply unlucky and your Line Port is faulty on your OBi device. If so, then put in a support ticket.
Put in. Waiting.
Disappointing.
Thanks.
Jon9999:
Spoke with OBi support. Unit apparently defective.
RMA'ed.
NewEgg is taking care of the exchange, after some prodding and invocation of the magic "supervisor" word.
Jon9999:
Well, not quite...
I received a second, brand-new OBi110 from NewEgg to replace the one with the loud buzzing noise on the PSTN line.
It had the same problem, which started 5 or 10 minutes after I connected it, around the time that I received my first incoming PSTN call through the OBi. I hadn't made any configuration changes, other than activating it via OBiTalk.
Again, this isn't just a background hum. It's a very loud buzz, with no other sound (no dial tone, no voice), as soon as the call switches into the PSTN line.
OBi Support thought it might be "a coincidence" that I got two defective OBi110's in a row, but I'm skeptical. I'm thinking that something, somehow caused the OBi line port to fry itself when I connected it to my phone line. But I've never had any phone, fax machine, or computer modem get fried from the same phone line, so it really doesn't make any sense.
Does anyone have any ideas about this?
Thanks,
JON
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