Carrier Access Billing System (CABS)

Telephone carriers bill other carriers for terminating calls to their
subscribers. For instance, let's say that Bell South provides me with
local service to my land-line phone, and let's say that Qwest provides
you with long distance service to your land-line phone. If you call
me, then Bell South will bill Qwest a small amount of money for
terminating your call to my phone. Telephone carriers keep track of
this sort of inter-carrier billing by using a Carrier Access Billing
System (CABS), and the carrier (ie. Qwest in this example) is
identified in the CABS system by their four-digit Carrier
Identification Code (CIC).

Apparently Verizon Wireless is so big that it's right hand doesn't
know what it's left hand is doing. I need to introduce Verizon's
right hand (their legal department) to Verizon's left hand (the people
who maintain the Verizon Wireless CABS system), so that I can find out
which carrier connected a particular call to my Verizon Wireless cell
phone.

Does anyone know anything at all about the CABS system that Verizon
Wireless uses?