The Demise Of ISDN
Barclay Communications2021-01-20T16:21:13+00:00The Demise of ISDN & the Impact on Professional Services Find out why professional services organisations are now looking at VoIP as an ISDN upgrade and what the benefits are... The ISDN standard was set in the late 1980s. During this era:The world wide web was just being inventedMobile telephony was just finding its feet - and [...]