SNAps: 510 Error on SDLC Connection


Article Change History
----------------------
10/15/92 - REVIEWED
* Reviewed for technical accuracy.

I'm trying to get an SDLC connection from the SNA*ps Gateway across an
Apple Serial NuBus card. The 3270 Emulator instantly put up a 510 error
on connect, and the Message log from SNA*ps Admin indicated a successful
connection to Host 01.

The Mainframe people at the remote host site got nothing at all on their
FEP port. Communications attached a breakout box to the line and said
that the Clear to Send line was held low (although I don't believe that
was coming from the Serial card).

Should I use port 2 (A or B) on the Hydra cable instead of Port 1A?
Can you confirm whether this is the problem?

As you might already know, the Apple Serial NB cards, as shipped, are
configured with ports 1A and 1B as high-speed V.35/RS-422 types of ports,
and ports 2A and 2B as low-speed RS-232-C ports. If you plan to use port
1A or 1B also as RS-232-C ports, you have to remove two small components,
called R-paks, from the card. Refer to the Apple Serial NB Card
Installation Guide for the location of these R-paks. If you use the V.35
modems, you can use port 1A. Otherwise you need to select ports 2A or 2B
in the SDLC Line Screen. See if the R-paks were removed from your card,
and/or configure the ports correctly, and try again.


Published Date: Feb 18, 2012