OBI110, UK PSTN Call Barring
ianobi:
It looks to me that your OBi110 is having trouble seizing the PSTN line. I wonder if you are a long way from the local telephone exchange?
Have a look at Status > PHONE Status the lower "port status" is the PSTN line. TipRingVoltage should be around -47v. If it is much lower than that try a lower setting here:
Physical Interfaces > Line > Port Settings > TipRingVoltageAdjust
Once all is working normally you should not need to dial "#" for Belgacom dial tone, but it is a useful test for now.
Shale:
I wonder if that system might be doing a polarity reversal detection and interpreting that as a hang-up. I don't know why there would be a reversal. This setting is the one I am wondering if setting this to no/off would help:
Physical Interfaces->Line Port->DetectPolarityReversal
This is just a guess. If you are hardware oriented, you could also try monitoring the line with an oscilloscope or even an analog voltmeter during the call to see if there is such a reversal.
rizdina:
I don't know how far I am from the central phone office. I get VDSL service so I can't be too far.
But when I checked the parameter you mentioned, it's very low...-52V. I adjusted the TipRingVoltageAdjust down to 3.1V (and every setting in-between). The 3.1V setting is the lowest that my screen shows. Unfortunately, no change. I can occasionally make an out-bound call, but most of the time it's not going through.
I also tried adjusting the DetectPolarityReversal parameter, but this didn't affect anything.
Here are the parameters from my PHONE/Line Port Status screen:
PHONE and LINE Port Status
State On Hook
LoopCurrent 0 mA
VBAT 58 V (11.9 V)
TipRingVoltage 46 V
LastCallerInfo --
State On Hook
LoopCurrent 0 mA
TipRingVoltage -52 V
LastCallerInfo --
Riz
ianobi:
-52v is a good reading. This is a case where being more negative is good. One wire from the exchange is 0v so if the other is -52v, then that's a 52v difference.
Try increasing this setting to 1000:
Physical Interfaces > Line Port > Line Port > Dial Delay: 1000
This gives one second for the PSTN line to stabilise before any digits are sent out.
If this does not work, then you might try plugging the OBi110 in where the PSTN line first comes into your house, removing all DSL equipment etc, to see if the problem is in your house wiring or the incoming PSTN line.
rizdina:
Thanks for walking me through this. It is working now. In the end the problem turned out to be rather simple to fix. Looks like there was a problem with the new phone cable that came with my phone. I replaced it with an older (known good) phone cable and the OBI 110 started working perfectly. I guess the OBI is sensitive to voltage irregularities caused by the phone line.
Thanks again for the help, without your troubleshooting help, it would have never occurred to me to simply change a phone cable.
I did put in the new DigiMask sequence you recommended. The Belgian phone numbers are a bit confusing. Depending on the "area code" you dial, the subsequent number of digits varies. I think the fixed lines all have 6 digits following the area code, the mobile numbers have 7 digits and the toll free (0800) numbers have 5 digits.
Is there someplace I can find instructions on how to set up the DigiMask for outbound calls? I want to make sure the emergency numbers (police, fire, poison control, etc.) go through right away without any delay.
Riz
Navigation
[0] Message Index
[#] Next page
[*] Previous page