Technical Committee

Addendum to UNI Signalling V4.0
for ABR parameter negotiation

af-sig-0076.000

January, 1997

Addendum to UNI Signalling V4.0 for ABR parameter negotiation
af-sig-0076.000

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Section 10.2.1.1 of UNI Signalling V4.0, “QoS and traffic parameter selection procedures”, is modified as follows.

Under “Procedures for parameter defaulting” in the first bullet, change the default value of RIF and add a default value for RDF:

..., for RIF, the default value is 1 which is encoded as 15 (decimal), and for RDF, the default value is 1/32,768 which is encoded as 0.

In the table later in the same section (“summarizes the modifications that can be made”), replace the line for RDF as follows:

Parameter for a given direction	Modification by the network	
...	...	
RDF	Note 1	

Below the table, delete the existing Note and add the following text:

Note 1: The value of RDF may be increased or decreased, subject to the constraint that the ratio RDF / RIF shall not be decreased.  (Hence, if RIF is decreased by a factor k, RDF may be decreased by at most a factor k, or it may be increased.)