Columbia Kermit/kermit.zip/newsgroups/misc.20031118-20041115/000143_googlea.w.husm…spamgourmet.com_Sun Mar 21 12:38:15 2004.msg

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From: [e-mail] (Wolfgang Husmann)
Newsgroups: comp.protocols.kermit.misc
Subject: Kermit at Mac OS X with Keyspan SX Pro
Date: 21 Mar 2004 07:31:58 -0800
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I have been using successfully Kermit on my G4/Mac OS X
10.2.x/Griffins G4Port to communicate with my scientific calculator
Hewlett-Packard HP-48SX (for details please refer to my web page
http://chaos-zu-haus.de/HP48AndMacOSX/HP48AndMacOSX.html).

Recently I replaced Griffins G4Port (with a 3-way serial switch) by a
Keyspan SX Pro 4-port serial card. While my serial Palm III craddle
(software: Palm Desktop) and my modem US Robotics Sportster Vi
(software: Apples PPP) continue to work without any problems I cannot
get the HP-48SX to work: Kermit says "Carrier required but not
detected. Connection broken (carrier signal lost)."

Here is how I try to connect to the HP-48SX (sorry about the length of
this):

I connect the HP-48SX with Hewlett-Packards serial cable to the SX
pros serial port #1.

When I tell Kermit to use the SX Pros first port ("set line
/dev/tty.SXProSCP1.1") the status of Port1 in the "Device Details"
window of "Keyspan Serial Assistant" changes from "Available" to "In
Use 9600".

After that I check Kermits communication settings to make sure they
match the HP-48SXs settings:

)   /Users/wolfgang/) C-Kermit>show communications
)
)   Communications Parameters:
)    Line: /dev/tty.SXProSCP1.1, speed: 9600, mode: local, modem:
generic
)    Parity: none, stop-bits: (default) (8N1)
)    Duplex: full, flow: rts/cts, handshake: none
)    Carrier-watch: auto, close-on-disconnect: off
)    Lockfile: /var/spool/uucp/LCK..tty.SXProSCP1.1
)    Terminal bytesize: 8, escape character: 28 (^\)
)
)    Carrier Detect      (CD):  Off
)    Dataset Ready       (DSR): Off
)    Clear To Send       (CTS): On
)    Ring Indicator      (RI):  Off
)    Data Terminal Ready (DTR): On
)    Request To Send     (RTS): On
)
)   Type SHOW DIAL to see DIAL-related items.
)   Type SHOW MODEM to see modem-related items.

When I start the data transfer an error occurs:

)   (/Users/wolfgang/) C-Kermit>get FPFahrliste
)
)   ?Carrier required but not detected
)   ?Connection broken (carrier signal lost)

In "Keyspan Serial Assistant" neither "Device Details" nor "Event Log"
shows any trace of the failed data transfer.

To solve that problem I tried the following without success:
 - tried "/dev/cu.SXProSCP1.1" instead of "/dev/tty.SXProSCP1.1"
 - tried the other ports of the card with the appropriate entry in
/dev/
 - "set carrier-watch off" in Kermit makes Kermit to wait forever
instead of aborting with an error

Kermits "show communications" reveals differences between the Keyspan
SX Pro and Griffins G4Port:

"Carrier Detect (CD)": SX Pro OFF, G4Port ON
"Clear To Send (CTS)": SX Pro ON, G4Port OFF

I do not really understand what that means and how that may affect
kermits communication with the HP.

Any ideas?

Any hint towards a possible solution appreciated, Wolfgang H.