DURANGO, Colo., Nov. 3, 2014 (SEND2PRESS NEWSWIRE) -- The $30 billion U.S. private line services market has finally entered a period of no growth, says a market analysis study from Insight Research. Private line had always been a growth market for telcos and has been tracked by Insight for more than 18 years showing steadily increasing revenue growth. Yet the market is expected to decline 2.3 percent over the next five years, as the shift to packet-based Internet services allow customers to get higher bandwidth at lower costs which, in turn, is putting downward pressure on private line revenues.