Quote:
Originally Posted by idrougge
ZModem has always been unreliable via TCP/IP in my experience. You could try lowering the connection speed.
|
That is correct. The issue is that the ZModem protocol was designed for land-line use with a known maximum latency period (<50ms). Because TCP/IP packets are subject to random (and typically long) latency periods, ZModem won't work unless you can adjust the various internal parameters to allow for small size and long delays between packets. You have to remember that with a WiFi modem, like my WiModem232, you are dealing with communication to/from the WiModem, router, ISP, and connecting points. Ping times can be several hundred milliseconds long when spanning the globe, and often >50ms even within your own country.
Y-Modem, Y-Modem-1K, and Y-Modem-G are the best protocols to use with WiFi modems.