I suggest you check with the carrier as to how they have the pri hunting set up...sounds to me like all 10 circuits are not in one group. Also, I had a situation once where my system was using a frac pri..16 circuits but the telco set the pri for 23...that doesn't work very well.

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"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

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