I am trying to verify the maximum connect speed of two modems
connected to each other by various media such as two phone company
lines, two extensions off local PBX, and various line simulators.
I am using IBM PC Card modems that come with TP600s (and in one
case a Lucent Winmodem in a 600X).
Using default config ATZ I can never connect higher than 31200
V42bis, as reported by the connection string reported onscreen
in the terminal software. But I think I should be able to connect at
V34 or V90 at higher throughput.
How can I configure the modems to utilize their maximum
capabilities (ATZ should do?), why am I getting these anomalous
results, and is there any logging or diagnostic mechanisms at
hand (either inbuilt in these modems, or in any tools I might
use) to determine why connection speeds are low.
I have various other modems such as external USR Sportster
which I can bring to party if would help in diagnosis.
I am basically trying to study line conditions but have to make
sure the hardware is running at top speed before I can assess the
constraining effect of line conditions.
All comments welcomed
Kind regards,
Jeffrey Race, today in Bangkok Thailand
Tel +66 2 291-2235 (res) +66 2 279-6162 (ofc)
Tel +66 2 339-8025 (ISDN-res) 209-4201 (ofc)
Fax +66 2 688-4540 (backup +66 2 271-4956)
Tel +66 1 239-8197 (mobile -- 24 hours)
Tel +66 1 829-4682 (mobile -- odd times)
Avoid spinal damage from computer use!
Read "Cripples by Thirty?"
<www.camblab.com/nugget/nugget.htm>
