ISDN is in decline.
Switching from ISDN to SIP means you could up to 50% on line rental and 25% on calls
Traditional telecoms solutions are no longer the most effective option for business communications. With the increase in demand for flexible working and the need for more responsive business communications, it’s time you were introduced to SIP trunking, a next-generation alternative to traditional ISDN. Thanks to SIP trunking, you can reduce your telecoms expenditure, improve the consistency of customer service delivery and enable your business to support flexible and remote working practices