drlove@uunet.uu.net ("David R. Love") (05/03/91)
In the Stable Implementation Agreements there are two tables related to the Quality of Service. These provide Delivery Time Targets and Forced Nondelivery Times. The times provided are provided in the absence of any standardized QOS parameters. My question regards the note that follows the tables. It states that "Both tables apply to the period between acceptance by the originating MTA in the originating Administration domain to the time of delivery in the destination Administration domain. Trnasit time within PRMDs is NOT included in the above times. " Does this mean that it is the lapsed time from time of submission until time of delivery to the recipient? Or does it mean the lapsed time from time of submission until delivery at the first MTA in the destination ADMD? Or is there some other definition? Any clarification would be appreciated. Dave Love
eskovgaa@cue.bc.ca (Erik Skovgaard) (05/04/91)
The X.400 "Quality of Service" is defined in F.410 and is measured from
submission to delivery. F.410 also defines some transit times for
relaying domains:
Grade of delivery 95% Transitted before
Urgent 0.45 hours
Normal 2.5 hours
Non-urgent 14.5 hours
Since intercommunication with PRMDs is not included in these times, you should
read these numbers to be measured from the transfer-in point to the
transfer-out point if PRMDs are involved on both ends of the chain.
CCITT does not allow PRMDs to be relays between ADMDs, so you should be
able to measure the time in a pure ADMD setting. Alas, we do not have
QOS requirements on PRMDs.
....Erik.hta@isolde.er.sintef.no (Harald Tveit Alvestrand) (05/04/91)
In article <24549@well.sf.ca.us>, decwrl!well.sf.ca.us!well!drlove@uunet.uu.net ("David R. Love") writes: |> |> |> In the Stable Implementation Agreements there are two tables |> related to the Quality of Service. These provide Delivery Time |> Targets and Forced Nondelivery Times. The times provided are |> provided in the absence of any standardized QOS parameters. |> My question regards the note that follows the tables. It states |> that "Both tables apply to the period between acceptance by the |> originating MTA in the originating Administration domain to the |> time of delivery in the destination Administration domain. Trnasit |> time within PRMDs is NOT included in the above times. |> " Given that the Implementation Agreements, like the original standards, are written from a PTT point of perspective, I think it is pretty clear. If you have User -> PRMD -> ADMD -> ADMD -> PRMD -> User (1) (2) (3) (4) (5) the time is measured from (2) to (4). The PTTs care only about what they can be held responsible for, and will write off responsibility for anything they can get away with. In this case, they have said that they only want to care about delay that occurs within their club, and not within the "untrustworthy" PRMDs. Whether they in fact follow their own definition or not, is another thing entirely. Harald Tveit Alvestrand Harald.Alvestrand@delab.sintef.no C=no;PRMD=uninett;O=sintef;OU=delab;S=alvestrand;G=harald +47 7 59 70 94