> When a modem is in Online mode (Send/Receive data) to switch it in
> Command mode (AT) it need to receive the +++ string with a minimum time
> guard between before the first and the last + and also a maximum time
> between +.
>I thought the guard time was covered by a patent owned by Hayes (RIP), and
>that some (many?) modem manufacturers don't include it to avoid licensing
>costs.
I have Diamond SupraExpress 56i modem, documentation on CD says S12, default 50,
is the guard time, in units of 1/50 second, of no data transmission before and
after the +++ string. But I set S12=250, and that +++ATH0 string still caused
the modem to hang up. But setting S2=128 without doing anything about S12
enabled the message with +++ATH0 string to go through. I was using DOS-based
Arachne. I don't know if other PPPs would be different in this regard
(OS/2 Warp, Linux, other Unixes, various Windows versions). I suppose there is
no problem on receiving. I was successful using OS/2 popclient without setting
S2=128. S2 is the ASCII code of escape character, 43 (+) by default, range is
from 0 to 255, anything >= 128 is said to disable the escape (no upper ASCII?).
When I bought that modem, Hayes was still in business. Now would modem
manufacturers still have to pay licensing costs for that technology, with Hayes
dead and gone? Who would they pay licensing costs to?
Thomas Mueller
[EMAIL PROTECTED]
-
To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
the body of a message to [EMAIL PROTECTED]
