Carrier Voice-over-IP Market Off to Strong Start in 2015, Led by USA

The service provider voice over IP (VoIP) and IP multimedia subsystem (IMS) equipment market hit $1.3 billion worldwide in the first quarter of 2015 (1Q15), a 29 percent increase from the same period a year ago, Click here for more.

from Cellular News http://ift.tt/1BoALbc