
ISDN (Integrated Services Digital Network) connectivity is a faster form of dial-up access. It is a set of communication standards designed to digitally transfer voice, video, data and other network services over traditional telecommunication network infrastructure. The key feature of ISDN is that it itegrates data and voice over the same lines.
It typically provides 64 kBits/s or 128 kBits/s for both upstream and downstream connections. The performance of an ISDN connection is significantly better than that of a dial-up connection.