"Plato" <> wrote in message
news:...
> I'm looking for some sort of document that lists features that one
> might expect to "lose" if they choose a pure IP VoIP solution (e.g.
> Cisco or 3Com) over an IP-enabled PBX solution (e.g. Avaya, Nortel,
> etc.)
>
> Has anyone come across such a listing?
>
No, but I did a feature comparison (just from specs) a little while ago and
found the Cisco feature list to be quite short.
http://www.cisco.com/univercd/cc/td/doc/pcat/clmn.htm
This could just be a fault of the documentation, but the list lacked the
following:
Account codes
Intrusion (Barge-in)
Direct extension select (diversion override)
Hunt groups
ACD
Ring back
Do Not Disturb
DSS/BLF (except for operator)?
Paging
These are just the common features I would expect to see on anything calling
itself a telephone system. Perhaps a Cisco user can confirm whether these
features do exist or have since been added.
I didn't look closely at the 3Com NBX, but it appears to have DND, hunt
groups, paging and account codes.
The Mitel 3300 can be described as "pure IP" although it can include TDM
switching as well. This has a much greater feature list, as you'd expect
from a system inheriting many years of development on conventional systems.
I didn't notice any serious omissions on comparison.
Avaya's IP Office would come into the IP-enabled category. The central
server does not have a long history behind it, but the handsets have been
inherited from other Avaya systems. User features are good - nothing serious
omitted. Voice Mail features are basic, although the system has quite
powerful programming capabilities.