Your question concerns interconnect (inter-carrier) billing.
Generally, "call" and "charge" direction are the same, however in a toll
free number
the charge direction is reversed. This is not as tricky as it sounds as
carriers are settling the number of minutes
between them all the time. For billing purposes the source and
destination are reversed and charges ripple back from the
source to the destination. Of course, after you pay the bill the
carriers may take months or even years to settle up with each other.
Generally, calls that start and end on the PSTN do not use VoIP but
that doesn't mean that the quality from one geographic location will
be high, there is not a lot of encouragement to supply top grade lines
when it may take years of haggling with another carrier to retrieve your
charges.
Hope this helps
Henry
Liviu Toma wrote:
Hello,
I have a question more about telephony and long distance. A bit off
topic, I know, but I hope someone will help me with it.
When someone acquires a toll free number, they pay usually some long
distance carrier to provide it. However, I would assume that the call
from one end to another travels through several carriers, and the one
that was hired by the customer will split the cost with others, right
? And also, calls coming from different geographical places may take
different routes, through different carriers ?
My customer's problem that they have a toll free number for faxing,
coming into one of his land lines. Most of the calls coming in are OK,
but for a few of his customers, the quality of the calls is too poor
to be used for faxing. However the same customers seem to be able to
fax him just fine if they don't use the toll free number. One of my
thoughts was that his toll-free carrier may use VoIP for some segments
of the network, and VoIP is known to have issues with faxing.
Thanks,
Liviu
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