Provide SIP Trunks with USA Numbers

I’m setting up a high-volume call center environment and need reliable SIP trunk accounts sourced and configured by someone based in the United States or Canada. The trunks must support unlimited concurrent channels and come with local U.S... (Budget: $30 - $250 USD, Jobs: Asterisk PBX, Linux, PHP, SIP, Telecom Sales, Telecommunications Engineering, Telecoms Engineering, VoIP)