Hi Folks,
I am looking for some hints how to connect several (-> more than two)
gsm modems to one computer.
The situation:
I currently use kannel with 3 Wavecom modems as SMS gateways for three
different providers that do not route between each other (the computer
is running in West Africa). Therefore I had to set up one modem for each
provider. These modems are connected with the serial ports of the
computer. In order to get more than two serial ports I installed an old
ISA-card that offered me four serial ports which could be configured
with jumpers to set different IRQs. This was necessary because otherwise
you can only use two serial ports at a time. Then I used the
"setserial"-command at startup to define the different /dev/ttyS[n].
This works quite well, as long as you have these old ISA-cards :-(.
The problem:
In the next future I want to set up new servers in other west african
countries. Again - more than two different providers but no routing
between them - and - no ISA-cards left. And modern computers don't have
ISA-slots either.
So now I'm looking for a possibility to connect my Wavecom modems to a
modern computer. Did anyone use USB to serial converters to do so? Or is
there another way to connect a larger number of modems to a modern
computer hardware? I once tried to use PCI-serialport-cards, but I
didn't figure out how to set the IRQ there with Linux.
Any hints would be appreciated!
Greets from Bonn (Germany),
Lars-Hendrik
