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To stay with your trusty TDM based phone system or toss everything out in favor of a Voip system?

Why to refuse services which would increase the value of your productivity?
Substitute it all for a modern IP-Telephony Solution and take all the benefits this relative new technology offers.

How to proceed?

You have several choices:
- analog,
- digital, or
- IP phones
each desk and if to take TDM or VoIP to be linked with the external world. Some systems will still allow to mix and match.

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

Many PBX that handles a few telephone handsets will give you the option on how to connect telephones to the PSTN.

A pure IP PBX operates totally in the Internet world from handset to call termination. The equivalent to the traditional PBX is the PBX with Internet Protocol. The PBX with Internet Protocol is mainly a software running on a Linux system. The handsets are referred to as SIP phones.
SIP (Session Initiation Protocol) is the switching protocol that controls the telephone calls on packet based networks. Calls between subscribers of the same Voip service provider completely stay on the network and never enter the PSTN. Calls to and from non-subscribers are terminated to the PSTN at the provider’s location.

Usually you can mix and match purely IP PBXs, purely analog IP PBXs, purely digital and TDM IP PBXs. A Voice over IP system may well have FXS ports to connect to analog handsets, like traditional PBX telephone systems. The telephone service connection can be analog, T1, ISDN, or SIP Trunking.

In general modern IP PBXs offer a wider range of handset and telephone service connection options than legacy PBX systems. But before you make a big purchases or plans to scrap you current telephone system, you should ask a skilled expert or look for relevant information in one of the many Voip Review Sites you’ll find on the Internet.

J. T. Francisto

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