I am trying to find out the correct method of blocking 3rd Party Billing and collect calls from coming through our phone system.
our local provider claims that it is not possible from their end.
We are using DID and CO trunks from Verizon to an Nortel Option 11c.
It seems they should be able to prevent these type of calls.
Does anybody have any thoughts or ideas on how this is supposed to be accomplished?
our local provider claims that it is not possible from their end.
We are using DID and CO trunks from Verizon to an Nortel Option 11c.
It seems they should be able to prevent these type of calls.
Does anybody have any thoughts or ideas on how this is supposed to be accomplished?