Path: utzoo!attcan!uunet!know!cs.utexas.edu!swrinde!ucsd!ucbvax!naggum.uu.no!erik
From: erik@naggum.uu.no (Erik Naggum)
Newsgroups: comp.protocols.iso
Subject: X.25(1988) Errata
Message-ID: <1990-287-54345@uunic.uu.no>
Date: 15 Oct 90 15:05:45 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 143

As several of the knowledgable readers of this list and newsgroup have
noticed, the Blue Book X.25 Recommendation is littered with small typos
and errors.  I received the Errata sheets for X.25(1988), and have typed
them in as a public service.  Please update your text accordingly.  The
entries are sorted in increasing page number order, which the original
corrigendum was not.  Editorial comments and abrigdements of the text in
[brackets].

"Corrigendum No. 1" is dated June, 1990, and covers Fascicle VIII.2.

The title of section 6.28 in the list of contents, page 158

	"TOA/NEI" should be "TOA/NPI"

Tables 1/X.25 and 2/X.25, page 162

	All hyphens should be suppressed, [so that "8-bits" reads "8
	bits", and "16-bits" reads "16 bits"].  [Editorial comment: They
	left the "Bir order of transmission" typo; should read "bit".]

Table 13/X.25, page 196

	"TABLEAU" should be "TABLE"

section 3, title, page 204

	"packet level" should be "packet layer".

Table 15/X.25, page 211

	"TABLEAU" should be "TABLE"

section 4.4.2, third paragraph, last line, page 215

	"on a contribution basis" should read "on a contractual basis"

section 4.6.3, first line, page 217

	"ocndition" should be "condition".

section 5.2.1, first paragraph, second line, page 219

	"TDA/NZI" should be "TOA/NPI"

section 5.2.1, third paragraph (Note), third line, page 219

	"TOA/NZI" should be "TOA/NPI"

section 5.2.1, fourth paragraph, second line, page 219

	"TOA/NZI" should be "TOA/NPI"

Figure 5/X.25, page 222, should be replaced by the following one [crude
ASCII rendition]:

	   8	   7	   6	   5	   4	   3	   2	   1
	---------------------------------------------------------------
	|		     Called DTE address length		      |
	|-------------------------------------------------------------|
	|		     Calling DTE address length		      |
	|-------------------------------------------------------------|
	:		     	Called DTE address		      :
	:			    (see Note)			      :
	:							      :
	:				+-----------------------------:
	:                               |			      :
	:-------------------------------+			      :
	:		     	Calling DTE address		      :
	:			    (see Note)			      :
	:							      :
	:				+-----------------------------:
	:				|  0	   0	   0	   0  |
	---------------------------------------------------------------

	Note -- The figure is drawn assuming the number of semi-octets
	present in the called DTE address field is odd and the number of
	semi-octets present in the calling DTE address field is even.

Figure 16/X.25, title, page 238

	"reste" should be "reset".

Figure 21/X.25, page 242

	This figure should be replaced by the following one (i.e. in the
	octet of "Registration length", "0" of bit 8 should be removed).

	:							      :
	|-------------------------------------------------------------|
	|		       Registration lengthh		      |
	|-------------------------------------------------------------|
	:							      :

Figure 22/X.25, page 243

	[Similar error to that in Figure 21/X.25, not reproduced here.]

section 6.14.5 in the title, page 252

	The word "with" should be deleted.

section 6.28, in the title and in the text, page 263

	"TOA/NPi" (5 times) should all be "TOA/NPI".

sectino 7.2.2.11, title, page 272

	"call restriction" should be "call redirection".

Figure B-2/X.25, b), page 281

	"(see note 6)" should be added after the statement "DTE clear
	confirmation or clear request".

Tableau [sic!] C-2/X.25, page 284

	[The "#38" under DISCARD in the second to last row should be
	moved to the ERROR box.]

Table C-3/X.25, the fourth row, page 286

	"call request" should be "clear request".

Table C-3/X.25, case a), 2nd table, Item 8, page 288

	"geater than 109" should be "greater than 109"

Annex H, the last line of the table, page 305

	The Line "TOA/NPI address subscriptions" should be moved towards
	the most left [sic] side to align with the line "call
	redirections and call deflections related facilities."

Appendix II, first line, page 307

	"link level" should be "data link layer".

--------------------------------

That was all.  For this time, at least.

[Erik Naggum]
Naggum Software, Oslo, Norway.