ITU-T Q.257-1988
3.1 General - Specifications of Signalling System No. 6 (Study Group XI) 5 pp

Standard No.

ITU-T Q.257-1988

Release Date

1988

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.257-1988

Scope

The heading generally consists of the first five bits of the signal units (bits 1-5). There are two exceptions to this rule, viz all subsequent signal units are identified by the same 2-bit heading code O O (bits 1-2)

ITU-T Q.257-1988 history

• 1988 ITU-T Q.257-1988 3.1 General - Specifications of Signalling System No. 6 (Study Group XI) 5 pp