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Originally Posted by ahays
There is an outgoing "per call CPN blocking" Feature Access Code that you might try (dial the FAC followed by 9-1-800-etc). SOMETHING will surely be presented to the Call Center but who knows what that might be (probably your BTN).
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They would have to receive BTN - according to the FCC, ANI is defined as "the delivery of the calling party's billing number by a local exchange carrier to any interconnecting carrier for billing or routing purposes, and to the subsequent delivery of such number to end users"
Even if they are your trunks, your carrier may not be able (legally) to block ANI delivery - even when making the call from your own trunks. Their ruling on privacy
requires the carriers to deliver this information:
"Carriers must arrange their CPN-based services in such a manner that when a caller requests privacy, a carrier may not reveal that caller's number or name, nor may the carrier use the number or name to allow the called party to contact the calling party. The
terminating carrier must act in accordance with the privacy indicator unless the call is made to a called party that subscribes to an ANI or charge number based service and the call is paid for by the called party."
(quotes taken from
http://www.epic.org/privacy/caller_id/fcc_final.html)