Problems

Should you keep your traditional phone system or toss everything out in favor of a Internet Telephony system?

Why to miss services which would improve your productivity?
Substitute your IP-Telephony with a new VoIP PBX and take all the benefits this relative new technology provides.

How to proceed?

You have these options:
- analog,
- digital, or
- IP phones
on your desk and whether to go with TDM or VoIP to be linked with the outside. Some systems will still allow you to mix and match.

Which one to choose?
TDM?
VoIP?
or Both?
Why not?

Most telephone system that handles a few telephone handsets will give you an alternative on how to connect telephones to the PSTN or Public Switched Telephone Network.

A pure Voice over IP system entirely operates in the Internet world from handset to call termination. The PBX equivalent is the Internet Protocol PBX. The Internet Protocol PBX is mostly a software running on a Linux system. Handsets are referred to as SIP phones.
SIP (Session Initiation Protocol) is a switching protocol which controls the telephone calls on packet based networks. Calls between subscribers of the same Internet Telephony service provider completely stay on the network and never enter the PSTN or Public Switched Telephone Network. Calls to and from non-subscribers are terminated to the PSTN at the provider’s location.

Generally you can mix and match purely analog phone systems, purely digital and TDM phone systems and purely VoIP phone systems. A Voip system may well have FXS ports to connect to analog handsets, like traditional PBX telephone systems. The telephone service connection may be ISDN, T1, analog or SIP Trunking.

Generally modern Voip PBX telephone systems offer a wider range of handset and telephone service connection options than legacy PBX systems. Before you make a big purchases or plans to scrap you current telephone system, you may consult a skilled expert or search for related information in one of the many Voip Review Sites you’ll find online.

J. T. Francisto