Re: SDLC, 2793 and IOP-less mode

You need to be sure you are dealing with the
correct port for SDLC.

Here is the Sales manual full description:

(#2793) - PCI 2-Line WAN w/Modem

The #2793 is a 2-line/port WAN w/modem adapter.
This feature is the non-CIM (Complex Impedance Matching)
version offered in all countries except Australia and New Zealand.

Port 0 is the modem port and supports V.92 56K Async PPP,
V.92 data modem, V.44 data compression, V.34 FAX modem and
FAX functions, such as ECM and 2D/1D conversion. Port 0 does
not provide Sync modem capabilities (SDLC and Sync PPP).

Port 1 is the RVX port and supports multiple communications
protocols, including synchronous operations.

Select one of the following cables to attach to port
0(modem port):

    * #1010 Modem Cable - Austria
    * #1011 Modem Cable - Belgium
    * #1012 Modem Cable - Africa
    * #1013 Modem Cable - Israel
    * #1014 Modem Cable - Italy
    * #1015 Modem Cable - France
    * #1016 Modem Cable - Germany
    * #1017 Modem Cable - UK
    * #1018 Modem Cable - Iceland/Sweden
    * #1020 Modem Cable - HK/NZ
    * #1021 Modem Cable - Fin/Nor
    * #1022 Modem Cable - Netherlands
    * #1023 Modem Cable - Swiss
    * #1024 Modem Cable - Denmark
    * #1025 Modem Cable - US/Canada

Select one of the following cables to attach to port
1(RVX port):

    * #0348 - V.24/EIA232 20-Ft PCI Cable
    * #0353 - V.35 20-Ft PCI Cable
    * #0356 - V.36 20-Ft PCI Cable
    * #0359 - X.21 20-Ft PCI Cable

    * #0348 - V.24/EIA232 20-Ft PCI Cable

The #2793 does not support the remote ring indicate function.

    * Attributes provided: One RVX port and one integrated modem port
    * Attributes required: One PCI slot (3 volt)
    * For 9405 - 520 (2793)
          o Minimum required: 0
          o Maximum allowed: 69 (Initial order maximum: 0 )
          o OS level required: i5/OS V5R2, or later
          o Initial Order/MES/Both/Supported: Refer to Feature

Pete Helgren wrote:

I am getting a error when I try to vary on an SDLC line on a brand new 520 at V5R3M0.. Doing some research I came across what I think is a direct hit on the problem but I don't understand the resolution. Could one of you hardware gurus chime in?

The description of the proposed resolution is from an IBM support document:

The 2793 2-port WAN adapter card (IOA) at Releases V5R3M5 and V5R4M0 supports only a PPP connection for ECS or Service Agent when operating in an IOP-less configuration. This is supported only over port 0 which is the internal modem port of the card. In IOP-less mode, port 1 (external RS-232 port) is non-functional. Moving the IOA to a position under a real IOP restores the functionality of port 1.

It's the "Moving the IOA to a position under a real IOP restores the functionality of port 1." Sounds simple enough (right?)....but how would you go about doing this?

Thanks,

Pete Helgren