Phone system cannot detect dial tone or seize line to make call

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fearfair:
Greetings,
 
   My obi202 is setup and works fine for calls from Google Voice, with an analog phone plugged directly into the unit, it can dial out no problem, etc.

   However when I plug my phone system into the ports on the obi, it cannot detect outside dial tone.  I am setting up a Voicepro VP206 system.  On the phone system support page, they state the following:

If you have trouble seizing an outside line to make calls, ask your provider to confirm that the modem or adapter provides -48 Volts DC standard loop current. A known solution we experienced is to reboot the modem.


Incoming calls ring and function just fine, just cannot place an outside call through the phone system. 

Does the VP206 provide -48 Volts DC standard loop current?

Is there a setting I can change to make it do so?  I have set  "DTMFMethod" = InBand, but that does not solve the problem.  Any advice?

Mango:
For the sake of troubleshooting, I'm assuming your VP206 is configured properly and would work if connected to a POTS line.

I just checked my OBi110's Physical Interfaces -> PHONE Port -> Port Settings -> OnHookTipRingVoltage.  It's set to a default of 46.  You could try setting this to 48 just in case the 2V makes a difference.  I would be surprised if it does, but it can't hurt to try.

Is there any change in the symptoms if you adjust the Tip-Ring Voltage Polarity?  Try setting both to Reverse.

If neither of these solve the problem, you can change them back to default.  Let me know either way.

fearfair:
Quote from: Mango on August 05, 2014, 12:37:02 pm

For the sake of troubleshooting, I'm assuming your VP206 is configured properly and would work if connected to a POTS line.

I just checked my OBi110's Physical Interfaces -> PHONE Port -> Port Settings -> OnHookTipRingVoltage.  It's set to a default of 46.  You could try setting this to 48 just in case the 2V makes a difference.  I would be surprised if it does, but it can't hurt to try.

Is there any change in the symptoms if you adjust the Tip-Ring Voltage Polarity?  Try setting both to Reverse.

If neither of these solve the problem, you can change them back to default.  Let me know either way.


So, do you have the VP206 working with your OBi110?  If so, that gives me hope!

Mango:
Unfortunately no - I've never used a VP206.  But I have used OBi ATAs with other legacy PBX devices, under the default port settings, with success.

fearfair:
Tip ring voltage polarity or changing OnHookTipRingVoltage to 48 did not do the trick  ???

In both cases a standard phone plugged in to the obi still gets dial tone and functions normally.  I also tried changing OnHookTipRingVoltage to -48 with no success.

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