Does anyone have the proper USR Sportster V.92 Config wih Cisco Router for OOB on an AUX Port?

Posted on 2005-04-09
Last Modified: 2008-01-09
I have connected Sportster modems to Cisco routers in the past and had good success.  I saw detailed config suggestions from lrmoore and others for the old 33.6 models as answers to previous questions.  I have change DIP switch settings and tried some AT commands on the modem.  I have also tried customizing the Stopbits and other modem specific features on the AUX port.  I am trying to dial in from Hyperterminal under Windows XP.  When I first set this up I could connect to the modem but never got a Login to the Router.  After making more changes I have had difficults even get past the handshake and get a connection.  
Question by:liquidrules
    LVL 11

    Expert Comment

    Please see part of my working config (Cisco 2520 router and USR Sportster 56K modem)

    interface Async4
     description dialup
     ip unnumbered Ethernet0
     encapsulation ppp
     async mode interactive
     peer default ip address pool default
     ppp authentication pap ras
    line aux 0
     modem InOut
     modem autoconfigure discovery
     transport preferred none
     transport input all
     autoselect during-login
     autoselect ppp
     speed 38400
    LVL 11

    Expert Comment

    Also, you should set your modem for autoanswer (via reverse-telnet to the modem)

    Read here reagrding reverse telnetting:

    Author Comment

    Your config was very helpful.  But, I am still having a problem even though it is much more isolated.  Whenever I reboot the router the speed setting changes from 38400 (even though this is specified in the Startup) to 115200.  If I try dialing in I get garble.  If I go in via telnet or the console port and change line aux 0 to speed 38400 then I am able to connect every time and am able to read the screen.  If there are way to force the router to keep the speed 38400 after it boots up?  Any other suggestions?
    LVL 11

    Accepted Solution

    Check your modem configuration - "modem autoconfigure discovery" tooks modem settings and thats probably why you having 115200 after every reboot.

    Reverse telnet to your modem and see its configuration with ATI4 command.

    Look here for AT commands:

    If you having problems with reverse telnet - connect your modem to the PC's com port and start HyperTerminal.

    Author Comment

    Thanks for the update.  I have limited experience with these settings but do not see anything related to 115200.  I have included a dump of the ATI4 command below and a dump of the show line aux 0 after reboot.  However, I did notice that even though I specify 38400 in the startup-config, when the router re-boots both with AND without the modem attached the speed on the aux port is changed to 115200.
    U.S. Robotics 56K FAX EXT Settings...

       B0  E1  F1  M1  Q0  V1  X4  Y0
       BAUD=9600  PARITY=N  WORDLEN=8
       DIAL=TONE    ON HOOK   CID=0

       &A0  &B1  &C1  &D0  &G0  &H0  &I0  &K0
       &M4  &N6  &P1  &R2  &S0  &T5  &U6  &Y1

       S00=001  S01=000  S02=043  S03=013  S04=010  S05=008  S06=004
       S07=060  S08=002  S09=006  S10=014  S11=070  S12=050  S13=000
       S15=000  S16=000  S18=000  S19=000  S21=010  S22=017  S23=019
       S25=005  S27=000  S28=008  S29=020  S30=000  S31=128  S32=002
       S33=000  S34=000  S35=000  S36=014  S38=000  S39=000  S40=001
       S41=000  S42=010

       LAST DIALED #:


    show line aux 0

         5 AUX 115200/115200- inout     -    -    -      0       0     0/0       -                                                                              

    Line 5, Location: "", Type: ""                              
    Length: 24 lines, Width: 80 columns                                  
    Baud rate (TX/RX) is 115200/115200, no parity, 2 stopbits, 8 databits                                                                    
    Status: No Exit Banner, Modem Detected, CTS Raised                                                  
    Capabilities: Modem Callout, Modem RI is CD, Modem Discovery                                                            
    Modem state: Idle                
    Modem hardware state: CTS* noDSR  DTR RTS, Modem Configured
    Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation
                    ^^x    none   -     -       none
    Timeouts:      Idle EXEC    Idle Session   Modem Answer  Session   Dispatch
                   00:10:00        never                        none     not set
                                Idle Session Disconnect Warning
                                Login-sequence User Response
                                Autoselect Initial Wait
                                  not set
    Modem type is default.
    Session limit is not set.
    Time since activation: never
    Editing is enabled.
    History is enabled, history size is 20.
    DNS resolution in show commands is enabled
    Full user help is disabled
    Allowed input transports are pad telnet rlogin udptn.
    Allowed output transports are pad telnet rlogin.
    Preferred transport is none.
    No output characters are padded
    No special data dispatching characters

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