|
|
| [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] |
James Carlson wrote: > PierrotLafouine wrote: > >> My question is about reset. I would like to understand more the stack >> of the system, and why it failed to reconnect. The GPRS modem is >> connected trought full RS-232 signals, and RS-232 chips is on an ISA >> bus. How does ppp deal with this kind of hadware configuration ? I >> read ppp deal with modem reset, but how ? Any idea what I should look >> at to understand more the root cause of this failure ? >> > > If I had to bet on it, though, I'd bet on defects in the GPRS device > itself. This is also my bet, as software reboot didn't work, and a power down was needed to restore communication. But now the question becomes : how RS-232 chips translates a DCD into ISA bus signals ? I'll check into chips datasheet. Your detailed answer (thank you very much) raise me an other questions : some embedded boards (ex: BeagleBoard) are provided with GPRS modem. But looking at schematics, I notice most of them only connect Rx and Tx between modem and UART/RS-232. How would pppd deal with a lost of carrier in these case ? Is there a way (ex: command) to detect this trought data ? Thanks Pierre -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html