Started by DanielG, September 04, 2014, 11:45:56 AM
Quote from: sailing on September 10, 2014, 04:21:56 AMSorry for not responding sooner but I don't get to read the forum everyday. The on hook voltage is irrelevant. The off hook is where the problem would lie. 70mA seems awfully high but you didn't measure the voltage during off hook. Measure voltage and current off hook with a phone. Repeat with the Obi installed, with the phone plugged into the Obi off hook. The POTS specification is a compromise to allow few problems under almost any circumstance, such as being too close or too far from the CO. Some lines will be just outside the spec but a phone will work regardless. My thinking is your setup may be operating in this type of situation. The phone company only needs to make the lines work with phones so they know how to do that. Electronic devices are designed to work within a certain spec. Once outside of it and they may have problems.As of a couple of years ago, the integrated circuits in the Obi110 were from Silicon Labs and probably still are. I'll see if I can get the general specs for their POTS ICs. Then the above voltage and current measurements can be compared.
Quote from: DanielG on September 16, 2014, 12:50:26 PM Any other thoughts?
Quote from: sailing on September 17, 2014, 04:14:27 AMthe extra phones sinking some of the current