Seamless Use of Multiple
Devices
SIP presence will improve the productivity of businesspeople
by enabling them to seamlessly use multiple communication
devices. Today, most users view the presence status of a
buddy only as it pertains to their IM/desktop status, resulting
in inefficiencies in the way they communicate. For example,
they waste time playing voice/e-mail tag and by instant mes-
saging someone simply to ask, “can u talk?”
SIP provides options to collect and advertise presence and
preferences in a buddy list, but the presentity can now be a
desktop, a mobile phone, or another PC application. With a
unified approach, SIP will show the presence on whatever
device the user happens to be using, instead of simply being
“idle” or “out-to-lunch” based only on the desktop status.
Also, devices will be smarter and aware of their owners’
preferences, including which modes to communicate in
depending upon a variety of conditions. For example, if you
were present on your cell phone, but not your desk phone,
your buddy would know to click-to-call you instead of instant
messaging you while you’re moving 60 miles per hour down
the freeway.
Presence refers to the ability for SIP-based communications to
become smarter by facilitating communications based upon
a user’s preferences and ability to communicate.
Presence-PBX Integration
When SIP/SIMPLE IM is integrated with an IP-PBX, desktop
presence will include the on/off-hook status of the buddy’s
phone, all in the same buddy list. This use of presence means
that a caller can see whether his buddy is on the phone or
not, eliminating blind phone calls or e-mails.
Part 7: SIP and the Future of Intelligent Communications
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