Re: Communication question -- MIDRANGE-L

Tim,

            Who said anything about terminal emulation ??  As to recovery
that's what a watchdog card is for,
 but the E-911 operators get upset when the system is not there for any
reason !!!  An customer service waiting
 for the update to take place in a paging terminal, or phone switch are even
less patient.

    JMS.

-----Original Message-----
From: Tim McCarthy <TimM@softwarejungle.com>
To: 'MIDRANGE-L@midrange.com' <MIDRANGE-L@midrange.com>
Date: Thursday, June 03, 1999 1:09 PM
Subject: RE: Communication question


>Sorry to have to disagree Jeffrey but a fair percentage of our customers
>move their ASYNC comms from the PC to their AS/400 just because of the
>control and reliability they can get. How much reporting do you get from
>Procomm or HyperTerminal telling you when lines are down or files didn't
>get sent? How do you recover the PC when the comms application locks up
>- the old three finger salute's not much good in an unattended
>operation. We have customers running anywhere from 1 to over 100 comms
>lines without a networking staff. The only downside I see is the max
>speed of the slower comm ports but those can be upgraded.
>
>> -----Original Message-----
>> From: Jeffrey Silberberg [SMTP:jsilberberg@mindspring.com]
>> Sent: Thursday, June 03, 1999 7:12 AM
>> To: MIDRANGE-L@midrange.com
>> Cc: nina jones
>> Subject: Re: Communication question
>>
>>
>> Nina,
>>
>>         Yes, look at the "Asynchronous Communications Programmer's
>> Guide"
>> SC21-9592  for some direction and help in getting the AS/400 to
>> connect to
>> the link.
>>
>>         BUT, the reason I used the approach I have is that ASYNC over
>> a data
>> comm link can be a real issue with dropped or mal-formed bytes, and
>> timimg
>> issues to the ASYNC controller if you have an ACK/NAK protocol.  By
>> puting a
>> device at the interface and using a more robust protocol over the
>> network/DDS connection you will have MUCH less gray hair in the long
>> run.
>>
>>         You do have lot's of good options from list members.
>>
>>         Good Luck,
>>         JMS...
>>
>> -----Original Message-----
>> From: nina jones <ddi@datadesigninc.com>
>> To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
>> Date: Wednesday, June 02, 1999 11:07 PM
>> Subject: Re: Communication question
>>
>>
>> >>
>> >>         Nina I do this for clients day in and day out with
>> something that
>> is
>> >> much more critical that what GM is most likely sending, we do E-911
>> >> Automatic Number/Location Information interfaces.   You say the
>> data is
>> >> coming over a DSU/CSU connection in ASCII but not what is
>> generating it,
>> or
>> >> what the over the wire protocol is, if any, do you know ?
>> >>
>> >>         Our interface is a basic PC using COM1: to interface to the
>> ASCII
>> >> hardware, and APPC over Ethernet or Token Ring to talk with the
>> AS/400.
>> All
>> >> messages go in a Data Queue, as well as a Physical file.
>> >>
>> >>         Let me know if you think it's a fit, or if you want more
>> details.
>> >
>> >they wanted the data to go directly to the as/400, if possible, not
>> an
>> >intermediate p/c.
>> >
>> >nj
>> >+---
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