Problem with calls to US toll free numbers. in callwithus users forum http://www.dslreports.com/forum/r20750359 en Wed, 11 Nov 2009 08:20:41 EDT Wed, 11 Nov 2009 08:20:41 EDT Problem with calls to US toll free numbers. http://www.dslreports.com/forum/remark,20750359 sokhapkin : You may have problem calling US toll free numbers (like 1-800, 1-888) if you do not have a valid 10 digits North America caller id set up (not a toll free number!).

Toll free providers use caller id (more precisely ANI) to find out where the call came from and charge the toll free number owner accordingly. If caller ID information is not available or invalid, the call will fail.
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