PSTN calls disconnect in the middle of the call
lucaspiller:
I got my Obi the other day, and set it up and so far things have been great. Today though I was chatting with someone and the phone hung up, I called them back and the same thing happened, I rebooted my Obi110, they called back and then the same happened again.
It happened roughly 2 minutes after the call was connected. In the call log I can see the "End Call" event happened on "PHONE1" a few times and then on "LINE1" a few times.
Any ideas what it could be, and is it possible to enable debug logging to find out what caused this?
The Obi is connected to a BT line through an extension. I've set it up for the BT configuration I have found on these forums, including the disconnect tone.
drgeoff:
"extension" means a wired extension from a DEL (Direct Exchange Line) master socket or the 'phone line' is an extension on a PBX?
lucaspiller:
There is an extension from the master socket to a room upstairs. Connected to this socket is an ADSL filter with the Obi and an ADSL router (which was working fine).
EDIT:
I tested this again dialling a DID I have for work and the other way around. I put the phone on speaker next to a radio so there wasn't any silence. When dialling out after a couple of minutes the call disconnected on the "LINE" side and I heard a dial tone from the local phone. I then tried repeating it, but couldn't do so.
The levels when in a call are:
Phone
LoopCurrent 20mA
VBAT 17 V (12.0 V)
TipRingVoltage 7 V
Line
LoopCurrent 36mA
VBAT (blank)
TipRingVoltage -7 V / -8 V
tg.voip:
I have the same problem. Looking for the expert to solve the problem.
http://www.obitalk.com/forum/index.php?topic=7630.0
ianobi:
It looks like in both cases the OBi110 is seeing what it thinks is a disconnect signal. One approach would be to go here:
Physical Interfaces > LINE Port > PSTN Disconnect Detection
Disable all four methods of detection, that is all four parameters starting with the word "Detect". See what happens for a few days. If the problem goes away, then enable each of the detect methods that you consider useful one at a time. Hopefully, you will find which one causes the problem.
With all four disconnect methods disabled, calls should still hang up if both parties hang up. If not, then simply remove the line cord for a few seconds to disconnect the call during this test period.
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