[cisco-voip] Troubleshooting carrier issues

[Robert Kulagowski]

We recently ported numbers from PRI to a SIP service provider.
Probably 99% of the calls work, but sometimes the calling party hears,
"The number you've dialed is not in service".

Well, it is, because the DN gets calls.

And sometimes a call back works. Or a call to the main number. But the
issue is that it's persistent, and all of the numbers are in the same
range.

The gaining carrier has told us that they're "broadcasting" the range
in the big database in the sky, which is why we get calls. The losing
carrier says that the numbers were ported away, and that the LNP
Toolkit (whatever that it, but I'm guessing it makes dips against SS7)
shows the "point code" is our new carrier.

When we provide date/time, calling party and called party numbers, the
new carrier says that they never got the call, which of course is why
my logs don't show anything; there was nothing for them to send me.

Thoughts on how to proceed? How do I open a trouble ticket at the
"above the carrier" echelon?

Sheesh.