I'm working on project which involves TCP connection over GSM (basically LWIP <-> PPPoS <-> GSM). For testing and protocol dumping reason I would like to make a local, easy to monitor internet gateway and feed PPP over serial directly from my PC.
Back in 2000 I did a something similar...
I'm building a device which should work with GPRS, as I can understood - this is in basically PPP over serial line(PPPoS) via GSM modem. (Please correct me if i'm wrong)
For testing reason I would like to make a PPP server on my bsd pc which should work via serial line.
20 years ago I...