Also known as Switched 384 or 384, it is a subset of the ISDN PRI protocol that allows six channels to be switched as one unit, rather than as individual 64 kbps channels.
H0 [H-ZERO]
Meaning of H0 [H-ZERO] in English
DAX English glossary of key connectivity terms. Английский глоссарий основных терминов по коммуникациям DAX. 2012