Newsgroup: it.comp.hardware.modem
Titolo: ModemSURFR MOTOROLA 56K

Con quale comando at è possibile disabilitare il protocollo V90 per il modem
in oggetto e/o in generale?
Grazie

...

Non credo ci sia un comando, quella e' roba che e' scritta nel bios.
Se il tuo bios e' upgradabile puoi sovrascriverlo con altro, anche se non
te lo consiglio.
Tutti quanti stanno aggiornando i modem a quello standard, e' solo
questione di tempo :-))
Saluti
           Andrea
 WebLink   
www.freeweb.org/freeweb/ab/
Tutto per la costruzione di pagine web
Elimina -toglimi- per risposte in e-mail


Forse non č proprio cosě, le righe sottoriportate sono la risposta della
3COM/Robotics,
č da provare se vale anche per gli altri modem:
Per disabilitare lo standard V.90 si utilizza la stringa S32=66
Per disabilitare X2 si usa la stringa S32=34
Per disabilitare entrambi si usa la stringa S32=98
Informazioni del supporto tecnico della 3COM.
Ciao - Fausto

Forse ti possono essere utili le seguenti FAQ.
Saluti
Rocco.
                                       
                                  [
56K.COM
]
                     Home    Search    Glossary    Email
                              V.90 Upgrade FAQ
           
          Contents
          General issues for x2 and K56flex modems
             * Should I upgrade to V.90?
             * How do I upgrade my 56K modem to V.90?
             * Will upgrading to V.90 make my x2 modem
               K56flex-compatible or make my K56flex modem
               x2-compatible?
             * Are there any V.90 test numbers I can call?
          Upgrading K56flex modems to V.90
             * If I upgrade my K56flex to V.90, will I still be
               able to connect to K56flex modems at 56K speeds?
             * What init strings disable K56flex and/or V.90?
          Upgrading x2 modems to V.90
             * If I upgrade to V.90, will I still be able to
               connect to x2 modems at 56K speeds?
             * Why do I get much slower connects after upgrading
               to V.90?
             * How can I tell if the V.90 upgrade installed
               successfully?
             * What init strings disable x2 and/or V.90?
             * Can I downgrade a Courier back to x2?
                                       
                  General issues for x2 and K56flex modems
                              -----------------
          Should I upgrade to V.90?
          Until your ISP offers V.90, there's no advantage to
          having V.90 on your end. If you're currently getting
          connections faster than 33.6, I'd suggest staying put
          until your ISP upgrades.
          If you have a K56flex modem and a K56flex ISP, you
          should definitely not upgrade until your ISP upgrades.
          K56flex modems upgraded to V.90 will be able to do V.90
          or K56flex, but not both. You'll need to reload the
          firmware to switch between the two protocols. More
          info...
          The one exception is that 3Com's V.90 upgrades include
          updated x2 code. If you have an x2 modem and are
          currently unable to get x2 connections, the upgrade may
          be worthwhile. The flip side of that coin is that the
          newer code won't work with ISPs that are using very old
          x2 code. If that happens, you'll be limited to
          conventional V.34 speeds (33.6 and slower). More
          info...
                                    [Top]
          How do I upgrade my 56K modem to V.90?
          In most cases, you will just need to download a
          firmware update from the manufacturer. Check the V.90
          Upgrade Guide for links.
          The biggest problem for many people will be not knowing
          who made their modem, or not being able to find the
          company. It's for reasons like this that I always
          recommend buying a brand name modem.
          There are ways of finding out who made your modem. See
          the February 23rd news here at at 
56K.COM
. For company
          Web pages, visit the Modem Manufacturer's Link Board.
                                    [Top]
          Will upgrading to V.90 make my x2 modem
          K56flex-compatible or make my K56flex modem
          x2-compatible?
          No. V.90 is a different protocol.
          If you've been waiting for a 56K standard to be
          compatible with your ISP, hope is near. When you and
          your ISP upgrade to V.90, you can connect using the
          V.90 protocol.
                                    [Top]
          Are there any V.90 test numbers I can call?
          3Com's test line supports V.90.
                                    [Top]
                                       
                      Upgrading K56flex modems to V.90
                              -----------------
          If I upgrade my K56flex to V.90, will I still be able
          to connect to K56flex modems at 56K speeds?
          For Lucent-based K56flex modems, yes.
          For Rockwell-based K56flex the answer is a definite
          "no". You'll be limited to a maximum 33.6 connect with
          the V.90 code loaded, and will have to go back to the
          K56flex code to get speeds greater than 33.6.
          Please note: This does not apply to new modems that
          support both K56flex and V.90. They have enough memory
          to support K56flex and V.90 simultaneuously. It only
          applies to K56flex modems that have been upgraded to
          V.90 with software, and is caused by limited memory in
          the modem.
          Shane Lord of Sirius Technologies provided this
          explanation:
               Just a bit of info you may or may not know...
               You mentioned in your news that two other
               companies have announced that their modems
               will support V.90 in March, but that they can
               only use one or the other (V.90 or K56flex).
               The reason for this is because the original
               reference design (and the single chip
               RCxxx56ACF/xx chipset) supplied by Rockwell
               to modem manufacturers for K56flex,
               incorporated 1 meg flash EEPROMs, as the
               chipset used was limited by the memory it
               could access.
               K56flex, being the highly complex code that
               it is, takes almost all of the 1 meg flash
               EEPROM, and therefore there is no further
               room for extended code expansion (such as
               V.90 implementation). The need for two
               firmware revisions loaded at once was not
               foreseen in the initial implementation of
               56k. This is why units based on this design
               can only have K56flex or V.90 loaded in
               firmware at any one time, not both.
               To support both in firmware, Rockwell have
               released a new reference design, and a 2 chip
               solution, that can reference a larger set of
               memory. All future designed products from the
               Sirius Technologies group of companies
               (NetComm/ Banksia/ Simple/ Avtek) will
               incorporate this.
          A Rockwell employee says that Rockwell now has a one
          chip solution that supports both K56flex and V.90.
           
                                    [Top]
          How can I tell if the V.90 upgrade installed
          successfully?
          If this is a Rockwell-based modem, issue this command
          in a terminal program: AT+MS=?
          A K56flex-only Rockwell-based modem will respond like
          this:
          (0,1,2,3,9,10,11,56,64,69)
          Note that the numbers jump from 11 to 56.
          A K56flex Rockwell-based modem that has been upgraded
          to V.90 will respond like this:
          (0,1,2,3,9,10,11,12,56,64,69)
          Note that there is now a 12 between the 11 and 56. The
          12 represents support for V.90. These codes are
          explained on page 43 of Rockwell's AT command reference
          manuals (Adobe Acrobat required).
                                    [Top]
          What init strings disable K56flex and/or V.90?
          It's sometimes useful to be able to disable protocols
          in order to dial into a particular host. These commands
          were provided by Jay Price, an application engineer
          with Computer Peripherals International, and by
          Rockwell. I am waiting for a response from Rockwell for
          confirmation.
          Add these commands to the end of your modem init
          string.
          For most Rockwell chips:
           V.90 preferred
           (K56flex will still   +MS=12,1
           work)
           V.90 only, K56flex
           and V.34 disabled     +MS=12,1,34667,56000
           K56flex preferred
           (V.90 will still      +MS=56,1
           work)
           K56flex only, V.90
           and V.34 disabled     +MS=56,1,34000,56000
           Disable V.90 and
           K56flex, use V.34     +MS=11,1
           (28.8/33.6)
          For Rockwell HFC chips:
           V.90 preferred (K56flex will
           still work)                    +MS=V90
           K56flex preferred (V.90 will
           still work)                    +MS=K56FLEX
           Disable V.90 and K56flex, use
           V.34 (28.8/33.6)               +MS=V34
                                    [Top]
                                       
                         Upgrading x2 modems to V.90
                              -----------------
          If I upgrade to V.90, will I still be able to connect
          to x2 modems at 56K speeds?
          Yes. Upgraded x2 modems will still be able to connect
          to either x2 or V.90 hosts and achieve faster-than-33.6
          speeds. However, see the next question.
                                    [Top]
          Why do I get much slower connects after upgrading to
          V.90?
          The most likely explanation is that your ISP is using
          older x2 code. 3Com's V.90 upgrade also includes
          updated x2 code that has problems when it encounters
          very old x2 code on the server end. The main symptom is
          that the modems won't connect at 33.6 or less, but
          could connect at faster than 33.6 prior to the
          upgrade.. This was covered in a PC World story by Brian
          McWilliams.
          The solution in some cases is for the ISP to upgrade
          their x2 code. As a result of these problems, 3Com has
          changed its policies and will allow ISPs with 3Com/U.S.
          Robotics equipment to upgrade to newer x2 code at no
          charge.
          According to 3Com, newer versions of the V.90 client
          code may be less liable to the V.34 fallback problem,
          so it doesn't hurt to try upgrading your firmware.
                                    [Top]
          How can I tell if the V.90 upgrade installed
          successfully?
          In a terminal program, send the AI7 command. V.90
          should be listed along with the other protocols.
                                    [Top]
          What init strings disable x2 and/or V.90?
          As with x2 and K56flex, it is sometimes necessary to
          disable V.90 for compatibility with the modems you're
          dialing. One 
56K.COM
 reader was unable to access his
          online banking service after upgrading his 3Com
          Sportster to V.90. Disabling V.90 allowed him to
          connect to his bank again.
          Here are the appropriate commands for controlling the
          56K protocol used on 3Com V.90 modems, as provided by
          John Powell, 3Com Field Engineering Manager. Add these
          commands to the end of your modem init string.
          Note that these are different in some cases from the
          commands for x2-only modems.
                        x2 on, V.90x2 off,
                        off        V.90 on     Both off  Both on*
           Sportster**  S32=66     S32=34      S32=98    S32=2
           Courier      S58=32     S58=1       S58=33    S58=0
          * Using AT&F1 in the init string automatically enables
          both protocols.
          **Non-U.S. Robotics modems that use x2 generally use
          the same commands as the Sportster
                                    [Top]
          Can I downgrade a Courier back to x2?
          Yes. This TotalService page contains an archive of
          older firmware.
                                    [Top]
                                   [Top]
                  Found a mistake or a bad link? Email us.
                            Copyright Softwords.
--
Posted from 
mail.tin.it
 [194.243.154.49]
via Mailgate.ORG Server - 
http://www.mailgate.org

te lo consiglio.
Preferirei non si chiamasse BIOS il firmware del modem.
I modem sono dispositivi molto più flessibili di quanto tu immagini,
possono funzionare in una miriade di modalità e si può anche chiedergli di
non funzionare al meglio delle loro possibilità.
Basta usare le parole giuste ;)
Ciao,
Lorenzo Colò.