ObiHai 110 and SIP Door Station (Valcom)

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ianobi:
RFord,

I'm sure hwittenb is correct - the Fon sees 48v on the "From TEL Company" port as a line idle condition, so it can interrupt the line and call the house phones when the call button is pressed. I guess it has something like the OBi110 LineInUseVoltageThreshold, so when the line voltage drops below say 25v, then it knows the line is in use and should not be interrupted.

Back to Valcom - how refreshing to see a company tech support actively seeking out issues with its products and offering advice. There's lessons to be learnt here ...   :D

hwittenb:
Quote from: RFord on March 08, 2013, 04:35:04 am

I'm thinking that I could connect a telephone cable from another VOIP ATA "Phone" Port to the unconnected "From TEL Company" phone port, to provide the 48V to that port of the Controller and see if this would negate the need for a specialize "N8NC Chip".  I currently have a PAP2T-NA mounted beside the OBi110, which is connected to my Alarm/Security System Panel and Phone Port 2 is unused on that ATA.   Your thoughts (will try in a day or two when I'm at that location)?


That is my thought exactly, cable the 48v from another ata's FXS (phone) port to simulate an attached phone line and run the test.

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