BOONTON, N.J., Dec. 4 (SEND2PRESS NEWSWIRE) — The worldwide market for presence-based telecommunication services, including instant messaging (IM) and push-to-talk (PTT), is expected to exceed $16 billion in 2009, as an ever increasing number of cellular and wireline carriers provide customized services predicated upon the availability of their end-users. According to a new market research […]
