Why is ISDN faster?
The above question and answer explain part of the reason ISDN is faster, but there are other factors as well. Since the waveform is very easy to determine, even if there is a lot of static, the signal can be sent much faster, without worrying about errors. ISDN can also use two phone lines simultaneously. An ISDN line is broken down into 3 parts. There are two B (Bearer) channels. The Bearer channels are what actually carry voice, data, and other services. Each B channel is capable of 64 Kilobits Per Second (Kbps). The D (Delta) channel carries control and signaling information about the two B channels back to the phone company. The two Bearer channels will each receive their own phone number. Each of these lines can be used for voice or data, interchangeably or simultaneously. These two 64k Bearer channels can be merged together (called bonding). When merged, these channels can achieve 128kbps. To break it down even further, 64 kiloBITS per second translates to roughly 8 kiloBYTES per
