Content for TS 25.431 Word version: 16.0.0
The present document specifies the standards allowed to implement Layer 1 on the Iub interface.
The specification of transmission delay requirements and O&M requirements is not in the scope of this document.
In the following 'Layer 1' and 'Physical Layer' are assumed to be synonymous.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
ATM Forum AF-PHY-0130.00 (1999-10): "ATM on Fractional E1/T1".
For the purposes of the present document, the terms and definitions given in TS 25.411
The Iub Layer 1 shall comply with the requirements of chapter 4 in TS 25.411
In addition, for the Iub Layer 1, it shall be possible to use n 64 kbit/s time slots within the scope of "ATM on Fractional E1/T1" as specified in ATM Forum AF-PHY-0130.00 , and to allow the co-existence of this interface with other interfaces on the same physical medium.