soundmodem, serial port, parallel port?

From: Vivi Kusumo (oexvjse.tefc@kerailya.tunkki.fi)
Date: Wed Feb 12 2003 - 16:22:04 EET

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    Hi all,

    I am trying now to communicate 2 machines using ax25
    protocoll in a room.
    The machines are using RH 7.1 kernel upgraded 2.4.19.
    The sound cards are PCI type and use the
    soundmodem-0.7.

    Firstly, I have tried using stereo cable as follow:
    |pc1|-|sc1|------(cross connection)-----|sc2|-|pc2|
    ping, ftp and telnet are worked enough.

    Secondly, I am trying wireless using HT (Kenwood
    TH-25G) <www.baycom.org/bayweb/tech/handy.htm> and PTT
    circuit from
    <http://campus.murraystate.edu/staff/scott.thile/k4set/packet/ptt.htm>.

    |pc1|-|sc1|-|ht1|<~~~~~~>|ht2|-|sc2|-|pc2|
    44.128.1.5 44.128.1.8

    [my1com]# route add 44.128.1.8 sm0
    [my2com]# route add 44.128.1.5 sm0
    [my1com]# arp -n 44.128.1.8 -H ax25 -s MY2COM -i sm0
    [my2com]# arp -n 44.128.1.5 -H ax25 -s MY1COM -i sm0

    [my2com]$ ping my1com
    PING my1com.ampr.org (44.128.1.5) from 44.128.1.8:
    56(84) bytes of data
    From my2com.ampr.org (44.128.1.8): Destination Host
    unreachable
    ..
    ..
    From my2com.ampr.org (44.128.1.8): Destination Host
    unreachable
    --- my1com.ampr.org ping statistics ---
    18 packets transmitted, 0 packet received, +17 errors,
    100% packets loss

    During ping
    [my2com]# listen -a
    axconfig: port 1 not active
    axconfig: port 2 not active
    sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
    IP: len 84 44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
    prot ICMP
    ICMP: type Echo Request id 42758 seq 0
    0000 ..J>I>..................! "#$%&'()*+,-./01234567
    sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
    IP: len 84 44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
    prot ICMP
    ICMP: type Echo Request id 42758 seq 256
    0000 ..J>a1..................! "#$%&'()*+,-./01234567
    sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
    IP: len 84 44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
    prot ICMP
    ICMP: type Echo Request id 42758 seq 512
    0000 ..J>B1..................! "#$%&'()*+,-./01234567
    ..
    ..
    [my1com]# listen -a
    axconfig: port 1 not active
    axconfig: port 2 not active
    [my1com]#
     
    How can I ping correctly pc1<-->pc2?
    Should I activate the serial port 1?
    Can I activate the parallel port if I use
    soundmodem-0.7 or it is only for serial port? As we
    might know for soundblaster (ISA) we can do
    # sethdlc -p -i sm0 mode sbc:afsk1200 io 0x388 irq 10
    dma 1 pario 0x378

    Many thanks for any help!
    Vivi

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