are you sure the modem is awake (as in, no software magic or no bios needs to wake it up)?
that modem has firmware that can be updated; do you have the latest?
what happens if you send a regular hayes command to the modem, for example: escape, speaker always on, volume up and a pause (to hear a line)?
$ echo '+++'>/dev/ttyS4
$ echo ATM2L3>/dev/ttyS4
$ echo ATD>/dev/ttyS4
do you now hear a dialtone (i am assuming it has a speaker)?
it's a usrobotics; i remember these had a slightly different command stack in the eighties and the nineties. but it should take standard hayes command nevertheless. the usr.com page doens't list a datasheet...
from your dmesg:
> [ 1.365228] 0000:04:01.0: ttyS4 at I/O 0xd000 (irq = 17) is a 16550A
this looks like a serial port, not like a fax/modem. do you have anything else in your dmesg that points to a modem? what does lspci tells you? try "sudo lspci -vvvk" and see if the modem is listed
to post the traces: they should be written to files automatically, just post these as attachments? make sure you do a trace of your problem (sending a fax):
are you sure the modem is awake (as in, no software magic or no bios needs to wake it up)?
that modem has firmware that can be updated; do you have the latest?
what happens if you send a regular hayes command to the modem, for example: escape, speaker always on, volume up and a pause (to hear a line)?
$ echo '+++'>/dev/ttyS4
$ echo ATM2L3>/dev/ttyS4
$ echo ATD>/dev/ttyS4
do you now hear a dialtone (i am assuming it has a speaker)?
it's a usrobotics; i remember these had a slightly different command stack in the eighties and the nineties. but it should take standard hayes command nevertheless. the usr.com page doens't list a datasheet...
from your dmesg:
> [ 1.365228] 0000:04:01.0: ttyS4 at I/O 0xd000 (irq = 17) is a 16550A
this looks like a serial port, not like a fax/modem. do you have anything else in your dmesg that points to a modem? what does lspci tells you? try "sudo lspci -vvvk" and see if the modem is listed
to post the traces: they should be written to files automatically, just post these as attachments? make sure you do a trace of your problem (sending a fax):