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From: eskovgaa@cue.bc.ca (Erik Skovgaard)
Newsgroups: comp.protocols.iso.x400
Subject: Quality of Service Definitions
Message-ID: <384*eskovgaa@cue.bc.ca>
Date: 3 May 91 17:34:36 GMT
Lines: 18
Approved: usenet@ics.uci.edu
In-Reply-To: <24549@well.sf.ca.us>

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.