By Johna Till Johnson, Network World, 03/20/06

In the telecom marketplace, it seems as though the only constant is change. Given the mergers, acquisitions and steady drumbeat of emerging technologies and trends, nothing stays the same for long. Last year's frame relay service has morphed into MPLS. Last year's voice VPN is changing into VoIP. And last year's carrier has a new name, a new logo - and possibly a new sales rep.