New modem faster than 28.8?

New modem faster than 28.8?

Post by Anthony Hi » Fri, 04 Nov 1994 14:50:49




Quote:>A friend of mine was telling me about a new standard that might be coming
>out soon (how's that for vague 8-) ) that is the next step up from 28.8.
>I am interested in how fast it will be and if there is in fact a new
>standard coming out. Any one heard anything?

        AT&T has announced that they are working on a propreitary v.34
extension that will run at 33.6kbps, of course most of us will never see
that speed since the phones lines need to be virtualy perfect.  It's
supposed to be availible around Jan. '95, and will likely be availible
from other companies that license the protocol from AT&T.

Anthony

--
Anthony Hill              | We don't need not S*KING signature files!

 
 
 

New modem faster than 28.8?

Post by Jeff Jon » Fri, 04 Nov 1994 03:31:36


A friend of mine was telling me about a new standard that might be coming
out soon (how's that for vague 8-) ) that is the next step up from 28.8.
I am interested in how fast it will be and if there is in fact a new
standard coming out. Any one heard anything?

--

AB6MB         | When I asked why the poor had no food, they call me a
              | communist. Dom Camara KPFA 94.1 Bay Area Progressive Radio!

 
 
 

New modem faster than 28.8?

Post by STEVE L » Tue, 08 Nov 1994 14:13:42



>Excerpts from netnews.comp.dcom.modems: 2-Nov-94 New modem faster than

>> A friend of mine was telling me about a new standard that might be coming
>> out soon (how's that for vague 8-) ) that is the next step up from 28.8.
>> I am interested in how fast it will be and if there is in fact a new
>> standard coming out. Any one heard anything?
>I doubt it.  The phone system is running internaly at 56K, and I don't
>think they could squeze much more than 28.8 (57.6 isn't too likely) with
>the losses from going digital-analog-digital-analog-digital.  28.8 is
>kinda pushing it, so V.34 is designed to negotiate lower speeds on lines
>that can't handle 28.8.

There's v.34bis, which will come out in Feb. 95, that has a max transfer rate
of around 34Kbps.
Quote:>What to look for?  ISDN.  ISDN lines now cost about the same as a
>regular phone line, and can handle 128Kbps with no analog conversion.

ISDN is 64Kbps per B channel, and there are two. however, many users use one
voice channel and one data channel, thus limiting the bandwidth to 64Kbps.
>Could be what your friend was talking about, but it isn't just a faster modem.
>Carl
>Carl Klemmer
>FactSet Data Systems, Inc.
>One Greenwich Plaza
>Greenwich, CT  06830
>(203) 863-1539



 
 
 

New modem faster than 28.8?

Post by Lance K. Ch » Tue, 08 Nov 1994 20:25:14



> There was some talk reported from the end of the V.34 standards process
> which indicated that a "V.34bis" was technically possible. However, I
> believe the DSP required and the increase in speed did not favor a new
> standard until the old one has been in place for a while.

> AT&T is talking about a faster modem, but (a) it's not going to be a
> standard, just a proprietary protocol like PEP, HST, V.FC. That doesn't
> mean "not useful" but "not standard."

> Finally, most phone lines don't support 28.8 using V.34 or V.FC now, a
> better standard would be likely to provide significant gain in the real
> world.

> As far as I know there will not be another standard for several years,
> although some ambiguities in the current V.34 may be resolved.

-----forward text----
ATT Paradyne has announced a 'V.34bis' modem. It's running at 33.3k and
will be available later this year. This modem will be able to reach the
top speed only on about 50% of all phone lines in the lower 48 states.
(Mostly in urban areas).

Cheers,

Wolfgang

--

WH Networks  .............................   ftp.whnet.com /pub/wolfgang
2672 Bayshore Parkway Suite 503  .......................  (415) 390-9316
Mountain View CA 94043  ............................  fax (415) 390-9317
----end forwarded text----

Yes, later this year means 1994. So far, AT&T claims it will be out before
Christmas.

 
 
 

New modem faster than 28.8?

Post by Peter Desnoye » Tue, 08 Nov 1994 20:06:57



 >
 >>Excerpts from netnews.comp.dcom.modems: 2-Nov-94 New modem faster than

 >>> A friend of mine was telling me about a new standard that might be coming
 >>> out soon (how's that for vague 8-) ) that is the next step up from 28.8.
 >>> I am interested in how fast it will be and if there is in fact a new
 >>> standard coming out. Any one heard anything?
 >
 >>I doubt it.  The phone system is running internaly at 56K [...]

Actually, that's 64kb/s - 8bit mu-law (logarithmicly coded) samples
every 125 microseconds. On some T1 lines the least-significant bit is
stolen every 6 samples, which still gives you more than 7.75 bits
worth of SNR.

 >>What to look for?  ISDN.  ISDN lines now cost about the same as a
 >>regular phone line, and can handle 128Kbps with no analog conversion.

"ISDN is 128kb/s" is a common mis-statement. If you order 2-line ISDN
service, place and pay for two simultaneous calls, and run
inverse-multiplexing or multilink software, then basic rate ISDN is
128K. By the same logic, V.34 is 57.6K.

In addition, "ISDN lines now cost about the same..." is highly
dependent on where you live.

...............................................................................
  Peter Desnoyers  : Midnight Networks Inc. 200 Fifth Avenue Waltham MA 02154

--

...............................................................................
  Peter Desnoyers  : Midnight Networks Inc. 200 Fifth Avenue Waltham MA 02154

 
 
 

New modem faster than 28.8?

Post by John Nav » Wed, 09 Nov 1994 02:03:46



> There's v.34bis, which will come out in Feb. 95, that has a max transfer rate
> of around 34Kbps.

No offense, but there won't be a "V.34bis" unless and until the ITU
approves it.  Anything else is just another &*^%$#&% proprietary
specification.  Just say no.

--
Best regards,

 
 
 

New modem faster than 28.8?

Post by Barry A Ba » Tue, 08 Nov 1994 21:07:16


Quote:>ISDN is 64Kbps per B channel, and there are two. however, many users use one
>voice channel and one data channel, thus limiting the bandwidth to 64Kbps.
>>Carl

Actually, at least with Ameritech in Chicago, you have the choice of buying a
single 64kbps line or two of them for 128kbps. They both can be used for data,
if you buy it that way. Putting your voice line on isdn is an option, which
could be a foolish mistake if you have a power outage and need to make an
emergency voice call, as isdn uses your local power, unlike the analog voice
phone system, and if the power is gone, so is isdn.

==============================================================

             FTP: ftp.mcs.net//mcsnet.users/barry
        Home Page: http://www.mcs.net/~barry/home.html
==============================================================

 
 
 

New modem faster than 28.8?

Post by Barry A Ba » Tue, 08 Nov 1994 21:08:51


Quote:>ATT Paradyne has announced a 'V.34bis' modem. It's running at 33.3k and
>will be available later this year. This modem will be able to reach the
>top speed only on about 50% of all phone lines in the lower 48 states.
>(Mostly in urban areas).
>Cheers,
>Wolfgang

So, by 50 %, you mean it will work at only half the callable locations, thus
making it half assed???  :-)

==============================================================

             FTP: ftp.mcs.net//mcsnet.users/barry
        Home Page: http://www.mcs.net/~barry/home.html
==============================================================

 
 
 

New modem faster than 28.8?

Post by Michael Salm » Wed, 09 Nov 1994 18:04:39




|> >ISDN is 64Kbps per B channel, and there are two. however, many users use one
|> >voice channel and one data channel, thus limiting the bandwidth to 64Kbps.
|>
|> >>Carl
|>
|> Actually, at least with Ameritech in Chicago, you have the choice of buying a
|> single 64kbps line or two of them for 128kbps. They both can be used for data,
|> if you buy it that way. Putting your voice line on isdn is an option, which
|> could be a foolish mistake if you have a power outage and need to make an
|> emergency voice call, as isdn uses your local power, unlike the analog voice
|> phone system, and if the power is gone, so is isdn.

I don't know how it works in the US but when I worked in Australia it
was a requirement that you be able to use a phone in case of power
failure. ISDN was unavailable but you at least had POTS. This seems to
be a reasonable requirement and I am surprised to hear that anyone
would offer ISDN without this capability.

--

Michael Salmon

#include        <standard.disclaimer>
#include        <witty.saying>
#include        <fancy.pseudo.graphics>

Ericsson Telecom AB
Stockholm

 
 
 

New modem faster than 28.8?

Post by Barry A Ba » Wed, 09 Nov 1994 20:02:08


Quote:>I don't know how it works in the US but when I worked in Australia it
>was a requirement that you be able to use a phone in case of power
>failure. ISDN was unavailable but you at least had POTS. This seems to
>be a reasonable requirement and I am surprised to hear that anyone
>would offer ISDN without this capability.
>Michael Salmon

Seems reasonable, and since this is all pretty new to the Ameritech New
service sales people, it is possible he made an error with his statement about
your voice line going out in a power outage, but, this is the info he gave me.

==============================================================

             FTP: ftp.mcs.net//mcsnet.users/barry
        Home Page: http://www.mcs.net/~barry/home.html
==============================================================

 
 
 

New modem faster than 28.8?

Post by Wolfgang Hen » Fri, 11 Nov 1994 04:01:04


: So, by 50 %, you mean it will work at only half the callable locations, thus
: making it half assed???  :-)

Barry,

V.34 28,800 bps will not work on 100% of lines either. So why dont
you call V.34 <whatever percentage> assed?

I would recommend that you have a look at the Shannon theorem,
developped by Claude Shannon in the 1950s while working at Bell Labs.

Since these fast protocols are so very close to true theoretical
limits it will be quite a challenge to make them perform well. And
it's one reason some companies decided to implement an architecture
which can be easily upgraded. I would not trivialise these efforts.

Cheers,

Wolfgang

--

WH Networks  .............................   ftp.whnet.com /pub/wolfgang
2672 Bayshore Parkway Suite 503  .......................  (415) 390-9316
Mountain View CA 94043  ............................  fax (415) 390-9317

 
 
 

New modem faster than 28.8?

Post by GREG PETER » Fri, 11 Nov 1994 04:26:30


 The next standard will probably be 68.8 when ISDN becomes fully
implemented.
 
 
 

New modem faster than 28.8?

Post by Barry A Ba » Fri, 11 Nov 1994 20:01:03


Quote:>: So, by 50 %, you mean it will work at only half the callable locations, thus
>: making it half assed???  :-)
>Barry,
>V.34 28,800 bps will not work on 100% of lines either. So why dont
>you call V.34 <whatever percentage> assed?

Wolfgang,

Lighten up, it was just a joke! And actually, When calling another 28800
modem, regardless of brand, I connect at 28800 about 98% of the time. Perhaps
you should check out PPI 28800 modems :-)

==============================================================

             FTP: ftp.mcs.net//mcsnet.users/barry
        Home Page: http://www.mcs.net/~barry/home.html
==============================================================

 
 
 

New modem faster than 28.8?

Post by Eric Edwar » Sun, 13 Nov 1994 13:16:09



> I don't know how it works in the US but when I worked in Australia it
> was a requirement that you be able to use a phone in case of power
> failure. ISDN was unavailable but you at least had POTS. This seems to
> be a reasonable requirement and I am surprised to hear that anyone
> would offer ISDN without this capability.

What's wrong with just putting batteries in the phone?  If you already
have an ISDN phone get an UPS!  Puting silly requirements like that into
the law just slows down the implimentation of ISDN and provides no benefit
in return.

----

Remember the home hobbyist computer: Born 1975, died April 29, 1994

 
 
 

New modem faster than 28.8?

Post by Christian Weisgerb » Sun, 13 Nov 1994 07:10:34



Quote:>  The next standard will probably be 68.8 when ISDN becomes fully
> implemented.

What are you talking about?

--
Christian 'naddy' Weisgerber, Germany

 
 
 

1. Has anyone gotten an HSP K56flex modem to connect faster that 28.8?

I got one of these cheap peice of junk at a computer show. It has no
mfr name to be found anywhere.  Only PCtel on the chipset.  I have a
compatible driver that says HSP 56K PNP driver but I can only connect
at  26400. It take a 33%  performance hit on my P166MMX.  Thanks  for
any info.

                                DKING7

2. midas=unmouse?

3. Does anybody's average thruput on a 56k modem actually go faster than a 28.8?

4. FS: $10 each plus shipping !!!! ALL MUST GO !!!

5. 28.8 modem faster than serial port?

6. Removing and reformating

7. WTB modem 28.8 or faster

8. GS monitors

9. @home: My 28.8 dial-up is now faster than my cable modem

10. New PPI 28.8 V34 completly different than 28.8 VFC.

11. How do I get ModemBlaster 28.8 PC Card to go faster

12. Why can't my 33.6 sportster go faster than 28.8?