ITU recommendations, V-series, Naming

momo wrote:

> is any one familiar with the v series data modems who could help me out?
> what does "bis" indicate in the naming convention? v.32 versus v.32bis?
> 

It usually refers to an enhanced specification.   The next enhancement of
the spec would be (IIRC) "v.32ter".


-- 

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Allan Herriman wrote:
>
> http://www.freetranslation.com/ says that 'bis' is French for
> 'encore'.


bis
\Bis\, adv. [L. bis twice, for duis, fr. root of duo two. See Two, and 
cf. Bi-.] Twice; -- a word showing that something is, or is to be, 
repeated; as a passage of music, or an item in accounts.
Source: Webster's Revised Unabridged Dictionary, (c) 1996, 1998 MICRA, 
Inc. 

On Thu, 23 Sep 2004 13:35:34 -0400, Jerry Avins <jya@ieee.org> wrote:

>Allan Herriman wrote:
>
>   ...
>
>> From http://www.dictionary.com
>> ( http://dictionary.reference.com/search?q=enhance )
>> 
>> Enhance
>> 1  To make greater, as in value, beauty, or effectiveness; augment.
>> 2  To provide with improved, advanced, or sophisticated features. 
>> 
>> I give up.
>
>So do I. It seems that the hype has made it to the dictionary. I lose,
>but so does the specificity of the language.

Since dictionaries are supposed to reflect current use of the language
rather than put a stake in the ground for all time, this is just more
evidence that the world is, in fact, going to hell in a handbasket.

;)

This thread makes my head hurt.   The other place in my experience
where "bis" shows up frequently is in music, and now I'm more confused
than ever.   My saxophones have "bis" keys, as do many woodwinds, and
I've never, ever, understood why they're called that.  It flattens a
note.  What the hell does that have to do with anything?  Most of the
other keys don't even get names...it's just not right that this one
gets one that makes no sense.

But I digress from our previous digression...




Eric Jacobsen
Minister of Algorithms, Intel Corp.
My opinions may not be Intel's opinions.
http://www.ericjacobsen.org

eric.jacobsen@ieee.org (Eric Jacobsen) wrote in message news:<4154b993.60834234@news.west.cox.net>...
> On Thu, 23 Sep 2004 13:35:34 -0400, Jerry Avins <jya@ieee.org> wrote:
> 
> >Allan Herriman wrote:
> >
> >   ...
> >
> >> From http://www.dictionary.com
> >> ( http://dictionary.reference.com/search?q=enhance )
> >> 
> >> Enhance
> >> 1  To make greater, as in value, beauty, or effectiveness; augment.
> >> 2  To provide with improved, advanced, or sophisticated features. 
> >> 
> >> I give up.
> >
> >So do I. It seems that the hype has made it to the dictionary. I lose,
> >but so does the specificity of the language.
> 
> Since dictionaries are supposed to reflect current use of the language
> rather than put a stake in the ground for all time, this is just more
> evidence that the world is, in fact, going to hell in a handbasket.
> 
> ;)
> 
> This thread makes my head hurt.   The other place in my experience
> where "bis" shows up frequently is in music, and now I'm more confused
> than ever.   My saxophones have "bis" keys, as do many woodwinds, and
> I've never, ever, understood why they're called that.  It flattens a
> note.  What the hell does that have to do with anything?  Most of the
> other keys don't even get names...it's just not right that this one
> gets one that makes no sense.
> 
> But I digress from our previous digression...

Why should bis mean anything at all in English. Its French. The CCITT
is based in a place where folk speak French. Why would you expect to
get things like V.34 Millenium Edition (sorry, couldn't resist that
:-) ).

Steve

Hi thanks for the explanations.
I got that.
Now I have got some more questions 
Does a bis or ter rec replace the previous version? is it mandatory?
and:
V.29 is built on most of the analog modems you can buy these days.
the ITU recommendation says that it is a Standard for 4 wire leased
lines! how does that go together?

Thanks Momo

momo wrote:

> Hi thanks for the explanations.
> I got that.
> Now I have got some more questions 
> Does a bis or ter rec replace the previous version? is it mandatory?
> and:
> V.29 is built on most of the analog modems you can buy these days.
> the ITU recommendation says that it is a Standard for 4 wire leased
> lines! how does that go together?
> 
> Thanks Momo

A specification is almost never replaced. The old one may be disallowed 
for new manufacture, but even that is rare. The specification for a 1200 
Baud modem is still just that, but later ones, while compatible with it, 
go to higher rates.

Jerry
-- 
... they proceeded on the sound principle that the magnitude of a lie
always contains a certain factor of credibility, ... and that therefor
... they more easily fall victim to a big lie than to a little one ...
                                                                   A. H.
�����������������������������������������������������������������������

momo wrote:

> Hi thanks for the explanations.
> I got that.
> Now I have got some more questions
> Does a bis or ter rec replace the previous version? is it mandatory?

I don't believe there's any requirement for a manufacturer to use only the
latest spec.  There is still plenty of recent equipment, that runs at only
300 or 1200 b/s.

> and:
> V.29 is built on most of the analog modems you can buy these days.
> the ITU recommendation says that it is a Standard for 4 wire leased
> lines! how does that go together?

That's a whole different series.  Telephone system modems are divided into
two main groups, 2 wire and 4 wire.  The modems used on most dial up phone
systems are 2 wire, though I have seen 4 wire dial up modems.  Modems used
on leased lines are generally 4 wire.  At one time, 4 wire modems were
often faster than 2 wire modems, because they could use the entire
bandwidth of the voice channel in each direction, whereas a 2 wire modem
had to divide the bandwidth, between the two direections.  However, with
modern technology, that's no longer the concern it used to be.

BTW, it's not polite to e-mail a response that should be posted only in the
newsgroup.  E-mail replies should only be used, when the discussion no
longer belongs in the newsgroup, because it's way off topic or contains
personal info.

-- 

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Steve Underwood wrote:

> Why should bis mean anything at all in English. Its French. The CCITT

Well, actually "bis" is latin... :-) and means something
like "twice", or maybe "second try".

So V32bis is something like "V32 second try" (this one
maybe gets better :-)), or perhaps "V32 second version".

"Bis repetita placent" ->
"What is asked for twice is what people want".

"ter", still from latin, "third time", so "third try",
"third version"...

If you're really curious:

"Semel in anno licet insanire" ->
"Once per year it is acceptable to be mad (to do crazy things)".

So "semel" = "once".

bye,

-- 
   Piergiorgio Sartor