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I have a few SPA112 in the field that work great for faxing and analog phones. However, I have a devil of a time getting them to work with alarm systems from Tyco, etc. Supposedly the alarm systems simply need dial tone to dial out but they just do...
I have a UC320W with the latest firmware loaded that has been having trouble from day one with a particular line disconnecting properly. At times one line will stay connected indefinitely until it is either unplugged or the phone system reset. Obvi...
Thanks so much for the detailed reply. I never would have guessed traditional dial tone had so many variables. I will look into this and hopefully find a solution. Have a good one!