SIP vs ISDN cost calculator

See for yourself the savings that can be made when migrating over from legacy ISDN to SIP trunks...

It's a simple 'ready reckoner' where we factored in the current market prices for both ISDN and SIP; you just have to input your current ISDN capacity and we'll calculate the potential savings with SIP… and if like the result, let us know - we’d be happy to provide the detail.

Using ISDN30


(60 channels maximum)








Using ISDN2


(30 channels maximum)



Your data














Please Note:


Please Note: