Thanks, but this string was/is not correct for the US market (NANPA - North America Numbering Plan) -
it would have worked for most calls, but -
A NANPA number is comprised of:
- “1” used to indicate long distance calling and is not always required depending on provider/call type
- NXX - area code where the leading digit is 2-9
- NXX - exchange where the leading digit is 2-9
- XXXX - number where any number is allowed in any position. (your have NXXX)
Special dial strings comprised of 3 digits are also allowed with such examples being 211, 411, 811, 911, etc.
However, using the X in all locations is a safe bet, as if not correct, the provider will let you know.
I limit the dial plan occasionally, but not always. I have not noticed the issue nor have any clients complained and all are updated, but I guess I will have to try and see what happens. 99.9% of my clients are on SIP.