The
current telephone service on campus is provided by a Public
Branch Exchange (PBX) system and supported by the Facilities
Management Office (FMO). Though the PBX offers reliable telephone
services, yet most of the manufacturers see it soon becoming
an obsolete technology and thus have ceased further development
on it. They are now concentrating their effort on developing
Voice over IP (VoIP) technologies, and IP Phone is just one
of the VoIP products that can integrate voice, data as well
as video on the same handset. IP Phone not only allows voice,
data and video to share the same network cable (hence reducing
cabling and support cost) but also offers many features normally
not found or cannot be implemented under the conventional PBX
system. Unlike PBX technology, the infrastructure of the VoIP
technologies is pretty much like an ordinary data networking
equipment. Consequently, the maintenance and support cost of
an IP phone system are significantly lower than that of a conventional
PBX system.
When IP
phone first entered the market a few years ago, its reliability
and voice quality were indeed questionable and many users found
them far from satisfactory when compared to the conventional
PBX. However, our recent pilot run has confirmed that the IP
technology is now mature and reliable enough for a campus-wide
implementation. The Computing Services Centre (CSC) therefore
recommends that the existing PBX system be gradually phased
out and that the IP phone technologies be adopted in all new
buildings and offices.
Advantages
of an IP Phone System
So what
are the advantages of using an IP phone system? The answers
are as follows: