Hi, I recently installed a US Robotics/3Com 56K FaxModem Model 5610 on my Linux box (Redhat 9.0) and am trying to make connection to the ISP provided through my workplace. I tried different ways but all failed though the Modem works perfectly with Windows system. The following is the related info from to my most recent try. I appreciate any insight provided about the problem. Thanks so much, James [root@jameslocal root]# lspci -v ... 01:08.0 Serial controller: US Robotics/3Com 56K FaxModem Model 5610 (rev 01) (prog-if 02 [16550]) Subsystem: US Robotics/3Com USR 56k Internal FAX Modem (Model 5610) Flags: medium devsel, IRQ 3 I/O ports at 1840 [size=8] Capabilities: [dc] Power Management version 2 ... [root@jameslocal root]# cat /etc/ppp/options lock crtscts defaultroute asyncmap 0 noauth noipdefault [root@jameslocal root]# cat /etc/resolv.conf nameserver 128.231.128.251 nameserver 128.231.64.1 [root@jameslocal root]# /usr/sbin/pppd /dev/ttyS4 57600 debug connect "/usr/sbin/chat -v '' AT OK ATDxxxxxxxxx CONNECT '' ogin:xxxxxx assword:xxxxxx " Connect script failed [root@jameslocal root]# cat /var/log/ppp May 4 12:38:24 jameslocal pppd[1226]: pppd 2.4.1 started by root, uid 0 May 4 12:38:25 jameslocal chat[1227]: send (AT^M) May 4 12:38:25 jameslocal chat[1227]: expect (OK) May 4 12:38:25 jameslocal chat[1227]: AT^M^M May 4 12:38:25 jameslocal chat[1227]: OK May 4 12:38:25 jameslocal chat[1227]: -- got it May 4 12:38:25 jameslocal chat[1227]: send (ATDxxxxxxxxx^M) May 4 12:38:25 jameslocal chat[1227]: expect (CONNECT) May 4 12:38:25 jameslocal chat[1227]: ^M May 4 12:38:50 jameslocal chat[1227]: ATDxxxxxxxxx^M^M May 4 12:38:50 jameslocal chat[1227]: CONNECT May 4 12:38:50 jameslocal chat[1227]: -- got it May 4 12:38:50 jameslocal chat[1227]: send (^M) May 4 12:38:50 jameslocal chat[1227]: expect (ogin:xxxxxx) May 4 12:38:50 jameslocal chat[1227]: 48000/ARQ/V90/LAPM/V42BIS^M May 4 12:38:56 jameslocal chat[1227]: ~^?}#@!}!X} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w?}'}"}(}"}3^L~~^?}#@!}!Y} }<}!}$}%]}" May 4 12:38:58 jameslocal chat[1227]: }&} }*} } }#}$@#}%}&&4w?}'}"}(}"[^~~^?}#@!}!Z} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w May 4 12:39:02 jameslocal chat[1227]: ?}'}"}(}"^C(~~^?}#@!}![} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w?}'}"}(}"Kz~~^?}#@!}!\} May 4 12:39:04 jameslocal chat[1227]: }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w?}'}"}(}""M~~^?}#@!}!]} }<}!}$}%]}"}&} }*} } }# May 4 12:39:06 jameslocal chat[1227]: }$@#}%}&&4w?}'}"}(}"j^_~~^?}#@!}!^} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w?}'}"}(}"2i~ May 4 12:39:10 jameslocal chat[1227]: ~^?}#@!}!_} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4w?}'}"}(}"z;~~^?}#@!}!`} }<}!}$}%]}"} May 4 12:39:12 jameslocal chat[1227]: &} }*} } }#}$@#}%}&&4w?}'}"}(}"}.};~~^?}#@!}!a} }<}!}$}%]}"}&} }*} } }#}$@#}%}&&4 May 4 12:39:14 jameslocal chat[1227]: w?}'}"}(}"FI~^M May 4 12:39:14 jameslocal chat[1227]: NO CARRIER^M May 4 12:39:35 jameslocal chat[1227]: alarm May 4 12:39:35 jameslocal chat[1227]: Failed May 4 12:39:35 jameslocal pppd[1226]: Connect script failed May 4 12:39:36 jameslocal pppd[1226]: Exit.

It looks as though everything is working due to the fact that you are trying to login. I had a similar problem with an ISP in the UK called Demon. I had to dial a different phone number in order to perform a scripted login. Give your ISP a bell, don't say that you are running linux as they will probably just hang up on you. Get through to a proper techie and explain that you are trying to connect either manually with something like hyperterminal (like minicom but for windoze) or via a script. You should be able to connect manually with either minicom (linux) or hyperterminal (windoze) along the following lines. Connect directly to the com port and type the following commands: ATZ (this resets the modem) ATDT 5551234 (this dials your ISPs number, in this case 555-1234....you will obviously have to change this to match your ISPs number) After dialling it should present you with a login prompt....enter your username and you should then be presented with a password prompt. Enter your password....press return at the next prompt and you should now be connected.

Thanks very much for the reply. Your suggestion is good one. With this number however I tried to make the connection with minicom exactly the same way that you described. ATDT xxxxx returned a garbage line and back to prompt without any thing displayed. I will definitely try a different phone number if it is available. Thanks, James

could be a parity and/or 7/8 bits per character issue

What country are you dialling from? If it is from the UK you can try dialling demon's purple romp which does support scripting just to see if you can get a username prompt. The number is 0845 2121 666. FYI http://www.demon.net/helpdesk/technicallibrary/turnpike/scripting/