Tagged Questions

0
votes
1answer
187 views

Modem hang-up time

I'm looking for some typical and worst-case times for a serial modem to hang up and DCD deassert after receiving the hang-up command string ("ATH"). My project uses a modem and occasionally must ...
0
votes
0answers
68 views

No response from device using half-duplex modem connection [closed]

We are facing a tough problem on half-duplex (analog / PSTN / V.23) modem connections. We are using this method to communicate with aged meter devices which are located all over the country. We are ...
1
vote
0answers
55 views

Serial Adapter in DCE mode

I'm developing software for a device that will act as a modem emulator. In order to test it out, I need to have a serial port that is capable of operating in DCE mode (e.g. is able to toggle the modem ...
1
vote
2answers
310 views

Sniffing ADSL data exchange

I would like to capture and decode the ADSL traffic going on between my modem to the CO equipment. I am thinking of a setup similar to the one shown in this paper, but it seems the necessary hardware ...