3
votes
1answer
56 views

Simple telephone system to record kids' “calls”

My four year old daughter loves playing with an old POTS phone. She has these amazing conversations on it and I thought it would be nice to record them, and perhaps even let her pretend to make ...
2
votes
0answers
86 views

Chat application for monitoring with scripts

I am looking for a chat application, which would have the ability to interact with a shell script. I need this for a home project. An example of the usage would be: A client sends a chat message to ...
3
votes
1answer
682 views

Which TCP congestion control algorithm is best for low speed radio modems?

On my project we have remote Linux nodes that communicate over the Internet via very low speed CDMA cell modems. The bandwidth on these modems is about 2kbyte/second and the RTT back to the server is ...
1
vote
1answer
271 views

High RX packet error count with modem - how to analyze?

I'm testing a CDMA modem on my Debian embedded Linux system. I'm doing some wgets of large files and am seeing the connection drop now and then. Looking at the ifconfig output for the PPP interface ...
2
votes
1answer
1k views

Linux PPP : how to debug disconnects with exit code = 16?

I'm using pppd and wvdial on my ARM Linux embedded system. I have a CDMA modem connected via a serial port and am connecting to the Verizon network. I am seeing that several times per day pppd exits ...
3
votes
1answer
180 views

Determine 2G or 3G connection

I am using WvDial to dial my USB modem up to my ISP. But how can I tell what network I am connected to: 2G or 3G?
1
vote
0answers
657 views

Changing mode preference (1x/EVDO/Hybrid) for USB modem

Device in question - Huawei HC156 (what it says on the packaging)/HC1260 (what it says in lsusb). I CAN connect to the internet with it, but I can't change modes between 1x, EVDO, Hybrid. The option ...