UK PSTN Voice quality dreadful through OBI -0 Solved. Not OBI problem - cable
ckdash:
Possibly there is a problem with the cable. Here is what I did.
My DECT phone had RJ11 at one end and a BT connector at the other - let's call it cable a; the obi110 came with a cable with RJ11 connector at each end - I'll call this cable b. So I used the cable a to connect the obi110 line port to my BT master socket, and I used cable b to connect my DECT phone to the obi110 phone port.
It is standard analogue line, which had no problems with that phone and cable for many years.
I can't find another power supply at the moment - goodness knows why as I have loads. They may have been tidied away by my better half.
I'll get the meter out tomorrow. Thanks for the advice.
ckdash:
Quote from: ckdash on May 07, 2012, 01:53:12 pm
Possibly there is a problem with the cable. Here is what I did.
My DECT phone had RJ11 at one end and a BT connector at the other - let's call it cable a; the obi110 came with a cable with RJ11 connector at each end - I'll call this cable b. So I used the cable a to connect the obi110 line port to my BT master socket, and I used cable b to connect my DECT phone to the obi110 phone port.
It is standard analogue line, which had no problems with that phone and cable for many years.
I can't find another power supply at the moment - goodness knows why as I have loads. They may have been tidied away by my better half.
I'll get the meter out tomorrow. Thanks for the advice.
OK. Rather than get themeter out, I thought I'd report what Obi itself thinks.
With both phone and line port off hook, I get:
Phone port:
Loop current 20mA
VBAT 17V
TipRing Voltage 7V
Line port:
Loop currenmt 23mA
TipRing voltage 6V
With them both on hook, I get
Phone port:
Loop current 0mA
VBAT 57V
TipRing Voltage 46V
Line port:
Loop currenmt 0mA
TipRing voltage 52V
I tried swapping the cables around and putting the necessary RJ11 to BT and BT to RJ11 adapters that I just bought in place, and that sent the system into a hissy fit, repeatedly ringing. I swapped those adapters for a couple I already had, and the repeated ringing stopped, but the buzz is back.
I haven't tried making any calls this evening to see what the voice quality is like.
It irks me somewhat that Obi sell the device in the UK, and it is clearly a consumer device not a business one but they sell it with a cable that does not have the necessary BT plug.
I'll report back further tomorrow.
ckdash:
Sorry it has been so long since I updated this. In the course of messing around with cables, I damaged the phone. I have bought a new one - Panasonic DECT KX TG8521E. There is now no noise or interference.
The annoying thing is that it worked at all when I had the wrong cables in place. Yes, I should have checked more carefully, but because I plugged them in and they worked after a fashion, I assumed they were OK.
So the moral of the tale is to be wary about the cables that you use.
I now have my Obi acting as the glue between my PSTN, my internal Asterisk server, and my external SIP provider, and doing it very nicely indeed.
Pawnbroker:
Glad to see that the problem is solved. It would be handy if you delete this thread to save others reading through only to find that there never was an issue with the obi.
On my posts, I see remove as an option (top right hand side). If that does not remove the thread, can you modify the top of the first post to state that the issue is fixed and not caused by the obi.
Thanks
kknb0800:
Quote from: ckdash on June 01, 2012, 06:53:41 am
Sorry it has been so long since I updated this. In the course of messing around with cables, I damaged the phone. I have bought a new one - Panasonic DECT KX TG8521E. There is now no noise or interference.
The annoying thing is that it worked at all when I had the wrong cables in place. Yes, I should have checked more carefully, but because I plugged them in and they worked after a fashion, I assumed they were OK.
So the moral of the tale is to be wary about the cables that you use.
I now have my Obi acting as the glue between my PSTN, my internal Asterisk server, and my external SIP provider, and doing it very nicely indeed.
I know this has been a while but which cables did you use as I'm having the same issues as you were? The BT to RJ11 cable is only 2 pin so I'm wondering if this is is the issue. Thanks
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