Ascend Archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: (ASCEND) V.90 Connect Speeds

There is no way I know of on the TNT to tell if a connection is V.90 other 
than the xx.333 or xx.666.  It is important to point out that even those 
even number connect speeds can still be V.90.

The only way I know of is at the modem end and that depends on the modem 
being used and it's capabilities.  The Xircom and 3Com modems have the 
capability of reporting true details/characteristics pertaining to its 
connection.  

To do this, you would have to make a connection using Hyperterminal and use 
the ATDT command to establish the connection then issue the ATY11 for the 
3Com (including all US Robotics 56kb modems) and the ATI11 command for the 
Xircom to see connection details.  These are pretty neat commands because 
they report retrains requested, retrains accepted, number of speed changes 
during each session, true transmit and receive speeds, protocol used to 
establish connection and more.  Each command, ATI11 and ATY11 do report 
different results but the basics are there for each.

Also, I know that the Intel and Xircom modems have S register settings that 
will force a V.90 connection.

One last note... listen to the modem tones.  V.90 has a distinct (new) tone 
that typically occurs twice.  First there is the typical "DeDum" then the 
normal modem negotation tones followed by a pause and two (usually two) 
"Bongs".  If the modem goes silent and the connection completes with a 
connection higher than 33.6... usually that equates to a V.90 connection.  
If additonal modem negotation tones follow the two "Bongs"... then expect 
V.34.  If you do not hear the "Bongs" but complete a connection above 33.6, 
then you can bet it is a KFlex connection.

Semper Fi
Mitch
-------------
Original Text
From: "Joe Pautler" <pautler@grasshopper.cit.buffalo.edu>, on 9/15/98 9:53 
PM:
To: SMTP@DC2@OCC["Jim Williams" <jaw12@ntrnet.net>]
Cc: SMTP@DC2@OCC[<ascend-users@bungi.com>]

Jim Williams wrote:
]
]I saw a posting somewhere regarding how to tell if you got a V.90
]connection when dialing in to the Ascend Max 4004 (or other Ascend box
]running V.90) ....how do I tell running full load 6.1.7 software if I am
]getting a v.90 connection...I know that in other systems that a 49,333
]means V.90 since it was not an even number...
]
]I get a 48K connection, but that could be K56Flex still

some speeds are valid for both protocols.
as someone previously posted to this mailing list:

K56Flex speeds are  (32 + n*2)K like:
  32000, 34000 ... 48000, 50000, 52000, 54000, 56000.

V90 speeds are  (28 + n*1.333...)K like:
  28000, 29333 ... 48000, 49.333, 50667, 52000, 53333, 54667, 56000

___________________________________________________________________________
Joe Pautler, E.I.T.                             University at Buffalo
CIT/OSS Network Engineering                     224 Computing Center
http://www.oss.buffalo.edu/~pautler             (716) 645-3536

++ Ascend Users Mailing List ++
To unsubscribe:	send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd:	<http://www.nealis.net/ascend/faq>

++ Ascend Users Mailing List ++
To unsubscribe:	send unsubscribe to ascend-users-request@bungi.com
To get FAQ'd:	<http://www.nealis.net/ascend/faq>