From: Vivi Kusumo (wlt.pktwdyknsz@mailit.tunk.net)
Date: Sun Feb 23 2003 - 04:23:45 EET
Dear Folks,
I have still problem to get the serial port 1 active
in my machine "one" (RH 7.1; Kernel 2.4.19; PCI Sound
Card; ax25 stuff; soundmodem-0.7). In idle condition
the voltage between pin 5 and 7 is -10.77 V, and in
ping condition is -10.79 V. The voltage different is
only 20 mV, I think it is not enough to trigger the
ptt circuit, isn't it.
[my1com]# ifconfig
..
sm0 Link encap: AMPR AX.25 HWaddr MY1COM inet addr:
44.128.1.5 Bcast: 44.128.1.255 Mask: 255.255.255.0
But in my other machine "three" (MiniLinux 2.2.15
pre10; ISA Sound Blaster) the serial port condition is
totally different. In idle condition the voltage
between pin 5 and 7 is -11.55 V and in ping condition
is +11.42 V. With this the ptt circuit works fine :-)
[my3com]# ifconfig
..
sm0 Link encap: AMPR AX.25 HWaddr MY3COM inet addr:
44.128.1.12 Bcast: 44.128.1.255 Mask: 255.255.255.0
How can I activate the serial port 1 in machine "one"?
Thanks for any help.
Vivi
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This archive was generated by hypermail 2b30 : Sun Feb 23 2003 - 04:24:09 EET