Tele-Communication (Telecom) Terms Glossary and Dictionary
ISDN H-Channel is a special, high-speed clear channel. H channels, designed primarily for full-motion color video, are not yet in common use. There are currently three kinds of H channel: H0 ("H-zero"), H11 ("H-one-one"), and H12 ("H-one-two"). An H0 channel operates at 384 Kbps (roughly one fourth of the North American Primary Rate Access or one fifth of a European Primary Rate Access). An H1 channel operates at 1.536 Mbps and occupies the whole North American Primary Rate Access. An H12 channel occupies the entire European Primary Rate Access.