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Beginner

Ring Voltage Drops ATA

Anyone ever experience a ring voltage drop on the SPA122? First ring measured has 72 volts and there after drops to low 60's. The firmware is 1.3.5 (004p)

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Advocate

Re: Ring Voltage Drops ATA

1. Ring voltage is configurable (40–90 Vpk). Which value you have configured ?

2. Ring voltage is AC superimposed on DC (about 48V). So did you measured true AC voltage (with DC component filtered out) or the values you mentioned are just sum of both voltages (e.g. we don't know if it's the AC component that has changed between rings) ? Note that some voltmeters doesn't measure properly AC voltage with non-zero DC component.

 

OK. Did you are experiencing an issue, or you are just curious ?

 

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Beginner

Re: Ring Voltage Drops ATA

Just curious on my end. Was running tests and saw this pop up. Would a ring booster help resolve this issue?

 

Editing to answer your questions:

 

1. Ring voltage is configurable (40–90 Vpk). Which value you have configured ?

 

Set to default of 85.

 

2. Ring voltage is AC superimposed on DC (about 48V). So did you measured true AC voltage (with DC component filtered out) or the values you mentioned are just sum of both voltages (e.g. we don't know if it's the AC component that has changed between rings) ? Note that some voltmeters doesn't measure properly AC voltage with non-zero DC component.

 

Would need to double check.

Highlighted
Advocate

Re: Ring Voltage Drops ATA

Would a ring booster help resolve this issue?

Sorry, only Oracle can respond it. You described no issue yet - yes, you mentioned different voltage for first and second ring, but it's rather interesting observation than issue.

 

If your phone recognize first ring, but no second one, then ring booster may help.