A Functional Comparison of VoIP Gateway vs. IP PBX

1
Voice conversations are relayed either as analog
or as digital signals. VolP technology makes it
possible to encode voice into data packets which
are then broken down into smaller units and
transmitted electronically. Functional difference
is the best place to begin VoIP gateway vs. IP
PBX comparison.
In an IP PBX system, the conversation of the
voice packets into data packets happens at the
source. That explains why IP PBX is often
referred to as a native IP device. The converted
packets are typically sent as native IP packets
and then reassembled once received on the other
end. The older PBX systems which do not have IP
addresses assume that the digital transmissions
will happen independently or over the POTS (Plain
Old Telephone Service). On the other hand, any
IP PBX has the ability of translating data
packets for the POTS infrastructure whenever
needed, as is the case in analog faxes. Another
functional difference in VoIP gateway vs. IP PBX
is how voice is broken down for transmission. A
typical VolP gateway works by breaking down the
voice and then stuffs the smaller segments into
IP packets at the network node. These broken down
pieces are then transmitted over the IP network.
The main difference in these technologies is
that the analog voice network assumes it will
transmit the packets over the POTS on the
network. Meanwhile, the gateway breaks down the
message into digital packets ready for
transmission on VolP. The biggest pro for a
company using a VoIP gateway vs. IP PBX is that
the company can either have an easy upgrade path
to VolP or even have multiplicity of devices and
use the gateway as a kind of translator.
2
Undertaking a complete PBX upgrade can be an
expensive affair especially if cabling has to be
done as part of the upgrade. For instance, there
are some VolP phones that will need at least two
cables. A good example of such phones is the
power over Ethernet phones. You could still
improvise with a switch based phone but if all
the data connections on a workstation are
engaged and you do not have the old voice
connection, you may want to upgrade to the new
standards of a four pair cabling system. A VolP
gateway is arguably the most optimal solution for
a network that wants to adopt the voice over
internet protocol. However, this could also
depend on how much depreciated the PBX switch
is. For purposes of illustration, supposing you
had a company that was headquartered at point X
that had just ventured into new territories at
pint Y and Z it would be great to implement a
VolP gateway at point X. The gateway will
interface between the two new cities and
translate the messages sent back to X from Y and
Z. However, points Z and Y would still be able to
communicate directly without having to go
through the gateway. ezTalks is a leading
provider of various solutions on voice over
including video conferencing software, voice
over internet calls and whiteboards. With
easytalks.com, you can conveniently collaborate
with your co-workers from any corner of the
globe. Visit us today and experience the
difference!
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