Review long distance carrier toll free routing tables, switch records and call detail reports to determine reason for 75% drop in toll free call volume on one 800 telephone number, This is not SIP or VOIP. This is traditional long distance service and requires expertise in telecom switching for long distance carriers.
8 freelancere byder i gennemsnit $566 timen for dette job
ok I understood your requirement but I have few doubts, text me so I can clear all my doubts right away, I can help you and i am ready for work. Thank you