ISDN

Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

SSAIB, ATSVR, ISDN2e, ISDN30e, EN54-25, FREE Minutes, ISDN, PSTN, ACD Agent, IP PBX, SIP channel, NGN numbers, CAT5e and CAT6 cabling, VoIP, 128-bit AES encryption , 256-bit AES encryption, BS 5839, EN-50131, ISO 9001, 2015 compliant , BS 7858 , SiA