Standard

ETSI PRETS 300 481

Not set

Corrigenda and amendments are bought separately.

Language
Services

Abstract

This ETS defines protocols for the synchronisation and aggregation of multiple ISDN channels at 64 kbit/s, these channels being with a differential delay in the range of ± one second and with or without octet integrity structure. It also addresses the case of interworking with a digital network restricted to a rate of 56 kbit/s. It is applicable to a wide range of user data transport up to 63 channels using ISO/IEC 13871 [1], but special provision is made for audiovisual systems according to ETS 300 144 [2], up to 24 channels; the aggregation may be network-based or associated with Customer-Premises Equipment. The available operating modes (B1, B2, B3, H2) provide options with/without transmission-management overhead and user-data rates at or less than the exact multiples of 64 kbit/s or 56 kbit/s. The number of aggregated channels may be varied dynamically during a session. Procedures are given for dealing with faults, including loss of channels and slip. Call control is outside the scope of this ETS.

Document information

  • Standard from ETSI_AC
  • Published:
  • Version: 0
  • Document type: IS