Path: utzoo!mnetor!uunet!husc6!bbn!uwmcsd1!ig!agate!ucbvax!SEED.AMS.COM!EWR
From: EWR@SEED.AMS.COM (Betsy Ramsey)
Newsgroups: comp.os.vms
Subject: Re: DECNET Phase V
Message-ID: <12373097961.21.EWR@SEED.AMS.COM>
Date: 8 Feb 88 14:57:04 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22


	Quoting from Digital publication "DECnet Digital Network
	Architecture (Phase V)" (Order No. EK-DNAPV-GD, copyright
	Sept 1987 by DEC), which describes DNA as developed by DEC,

	"In keeping with the goals of DNA, a system which implements
	Phase V is fully able to communicate with a Phase IV system.
	A Phase IV network can be migrated gradually to Phase V
	without requiring closely synchronized changes to multiple
	systems.  All of the protocols used in Phase IV are included
	in Phase V systems, although in many cases they will be used
	only for communcation with Phase IV systems.  To the user of a
	DECnet network, the change from Phase IV to Phase V will not
	be apparent, except that the new functions of Phase V will
	gradually become available."


	The document doesn't say anything about Phase III, but I
	assume that Phase III hosts will not be able to communicate
	directly with a Phase V host, although they should be able to
	go through a Phase IV host to a Phase V host.
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