devil@techunix.BITNET (Gil Tene) (09/04/90)
Hello ModemFolk,
I am testing a new TB2500 over sattelite phone lines. I have read around
about the special registers that should be used :
S121 : Echo Supressor compensation.
S120 : Packet length (0=Micro/small/Large,
12=Small/Large only, etc.)
J6 S36 : "Compansion" compensation :
This sets the length of a "beep" to be sent ahead of
packets. This avoids packets getting "clipped" because
of quiet intervals before them.
I have been playing around with combinations of the above registers,
and have found S121=1 S120=12 J6 s36=1 to work ok : I get around 7000 bps
going out over sattelite lines with bad delays. I have a problem with
the J6 S36 register though, it seems to be non-negotiable. My modem
uses J6 S36=1, but the other side doesn't, I get only half the
typical throughput on incoming data as I do on outgoing data.
Any ideas about how to set the other side's J6 S36 ? I intend to
have the final working connection to UUNET, and I don't think they
allow their modems to accept remote commands (right ? :-).
Anyone out there have experience with sattelite TB connections, which
he can share with me?
I will summerize data if there is enough interest.
Advthanks,
Gil.
--
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| Gil Tene "Some days it just doesn't pay |
| devil@techunix.technion.ac.il to go to sleep in the morning." |
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