Unified Communications Magazine January 2008
Volume 1 / Number 4
Featured Articles
In the old days (1990s) of “unified messaging” a big, overarching
program had to be written to gather email, voicemail and faxes into a
single inbox and enable a response. It was assumed that the user was
tied to the desktop. Indeed, at the time, that was touted as a ‘feature’
(e.g., “Day traders! You don’t have to walk to-and-from a fax machine
anymore!”). Today, the concept of FMC (Fixed-Mobile Convergence)
has brought mobility to UC, via the 3GPP’s VCC (Voice Call Continuity)
specifications describing how a voice call can be maintained as a
user’s mobile phone (usually conceived of now as a dual-mode device)
moves between circuit-switched and packet-switched radio domains.
This occurred first in the form of UMA (Unlicensed Mobile Access) for
GSM/WiFi (News - Alert) roaming, and now the larger, more general
IMS (IP-based Multimedia Subsystem) architecture, which itself allows
for more services to be added to those accessible by UC systems,
opens up the possibility of triple-or-more-mode phones that could
switch among various kinds of networks in an ad hoc manner.
Richard �Zippy� Grigonis
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Rich Tehrani
Publisher�s Outlook Talking with Avaya�s Stuart Wells On the Edge
Erik Linask
On the Edge Unified Communications Magazine
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