Are these both PCs?
Are they both directly connected on the same LAN?
How does the client discover the server’s IP address?
Can they connect if the client uses a dial-up connection?
Have you looked-up what that error code means?
eg, see: wavecom.com/modules/movie/sc … hlight=842
What do you mean by error codes “like” +CME ERROR:842 ?
What other codes are you seeing?
Of course it is - how the address is assigned is irrelevant!
First, you need to tell the Fastrack what IP address to connect to - how do you do that?
Remember that the Fastrack is external to your LAN - so you will also need to verify that the server is accessible to external devices.
Have you checked the settings on your router(s), firewall(s), etc?