Hello,
I have two machines, and 1 modem ( uses RS232) and I would like to share this modem between the two machines, what do I need to accomplish this ? has anybody done this before ?
Thanks
Rabie K
Hello,
I have two machines, and 1 modem ( uses RS232) and I would like to share this modem between the two machines, what do I need to accomplish this ? has anybody done this before ?
Thanks
Rabie K
Thanks Awneil,
will that work if I setup the two machines to call out at different times. without any interference.
in case of Machine A initiate the call and connects to the network and send AT commands, how can I let machine B wait until Machine A finishes or Line is not busy anymore ?
Do you have a suggestion ?
Thanks
Speak to their pre-sales technical support people and discuss your requirements with them!
I think they use the flow control signals to “block” one device while the other is using the modem…?
Thanks,
I did order one item for testing and I will give some feedback in case somebody else have the same situation where he has to share a modem.
Rabie K
The device costs almost as much as the modem cost.
I have two Machine A and B and the Modem.
If Modem is hooked up to Machine A and Not B :
Machine A sends AT command, modem respond.
If Modem is hooked up to both Machines ( A and B ) :
Machine A sends AT command, no response.
Machine B sends AT command, no response.
I don’t know what will be the ideal solution to share a DB9 connection.
Indeed - so why mess about trying to share 1 modem?!
Why not just get 2 modems?
Whatever you do otherwise is just going to be a kludge!
For production perposes buying 10000 modem is different than buying 5000 plus SIM cards and their data plans.
So I am trying to cut some costs, and look for a simple solution that I can benifit from.
The fact of the matter is that modems are simply not designed for sharing - an RS232 link is designed to be a simple, point-to-point link.
So it’s unlikely that you will find a solution that is both simple and reliable for volume deployment in the field!
Have you considered a Fastrack with two serial ports?
What are the “machines” that you are connecting? Can you have just one of them connected to the modem, and the other links to it?
+-----------+ +-----------+
| | | |
| Machine 1 +---------------+ Machine 2 |
| | | |
+-----+-----+ +-----------+
|
|
|
+-----+-----+
| |
| Modem +
| |
+-----------+