Internet telephony: is it worth the risk?

By queuetopia

Is it worth opting for VoIP? I’ve heard some horror stories about Internet telephony.
Anyone got any experience of the following:

BT BUSINESS BROADBAND VOICE

Aastra Intelligate 150

Aastra Intelligate 2025

Aastra Intelligate 300

Aastra Intelligate 3025

AVAYA IP OFFICE

GRADWELL CENTREX
Gradwell is one of the better IP Centrex providers. They can give you all kinds of numbers, one for every town in the UK, if you want to impress people that you’re company has UK coverage. For me there is still a question over IP Centrex, but if you’re feeling brave you could enjoy some benefits here.

NEC INFRONTIA XN12

SIEMENS HIPATH 2000

SIEMENS HIPATH BIZ IP

SWYX SWYXWARE COMPACT
This is a pure software-based phone system. The handset apart, there’s no specific hardware needed. It integrates with any other software application on your network. So you can route a call by clicking on a number, whether it appears in a Word document, a spreadsheet, or it’s on a web site. Very convenient.

TOSHIBA STRATA CIX 100

TOSHIBA STRATA CIX 100 (?)

Aastra Intelligate 2065

ALCATEL OMNIPCX OFFICE

ALCATEL OMNIPCX ENTERPRISE

CISCO UNIFIED COMMUNICATIONS

MITEL 3300 IP

MKC 7000 CS SIP

NEC INFRONTIA ASPIRE

SIEMENS HIPATH 5000

SWYX SWYXWARE ESSENTIAL
The great thing about these softphones is that adding an extra line is as easy as plugging in a USB cable. These are 100 per cent customisable too, through a graphical user interface. Which means you can personalise the phone to you’re your preferences.

TELEWARE INTELLIGENT EXCHANGE

TOSHIBA STRATA CIX 670

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