SIP (Session Initiation Protocol) is a new technology which allows for the creation of virtual phone lines between your PBX and the public network.Is SIP therefore a cost effective alternative to ISDN? The following explores this question.

Telephone calls can then be made over your internet connection with the subsequent savings being made on the ISDN and analogue line rentals.

Outgoing calls will be re-routed via a box over your internet connection using the SIP trunks.Incoming calls will still go over the ISDN lines.If the internet connection goes down outgoing calls will go over the remaining ISDN lines.This allows for a risk free way to try the new technology.In essence there are no investment costs either as the savings are immediate.

Cheaper phone calls and cheaper analogue and lSDN costs are the tangible rewards as the surplus lines are no longer needed.This means no initial investment as any minor installation costs are immediately swallowed up by the savings.

For example in any organisation not everyone needs to make or receive calls simulataneously.Most companies will normally rent more ISDN channels then they actually need.And that means unused line rental costs.What if these unused lines could be replaced by SIP Trunks at a fraction of the cost?

In a nutshell then the benefits of trying it out are clear.Replacing surplus line rental costs can be done in an entirely risk free way.Costly analogue and ISDN lines which are not being used can be a distant thing of the past.

When choosing a company to go with its important to note what rates they will charge you for calls.As mentioned previously its entirely possible to have this “hidden” benefit as well as the ISDN savings

A company currently running an interesting promotion offering free SIP trunking for life is Tipicall.

Learn more about alternatives to ISDN Lines. Stop by Martin wacey’s site where you can find out all about sip trunking and what it can do for you.