I need to know  how to connect to a channel I don't know the type of,
or how can I know the type channel that I'm going to connect to. Is
there a standard channel or something like that?

Could somebody help me showng the secuence of the steps to follow for
sending and recieving messages? (Header, message lenght, MTI, bitmap,
data fields).

Please I need an example that works. or some explanation. Help me!

Why would you try and connect to a Channel you don't know the protocol for?

Can you determine the protocol by tracing an existing connection -
perhaps using wireshark (or similar)?

Not really.

Search this mailing list, get the Programmers guide.

Examples in the guide and lots of detail on this mailing list.

Perhaps start by sharing what it is you want to do?

http://www.catb.org/~esr/faqs/smart-questions.html

--
Mark

I have found the help you need.  It's located here:
http://jpos.org/products/proguide.

Andy

Perhaps start by sharing what it is you want to do?

What I need to do is send messages to a terminal (the message is for aprove
or reject a transaction from a POS), the terminal will give me a response
accepting or rejecting the transaction.

So, I'll taka the response and update de database with the approval code.
That's all.

The Interface (where I'm going to connect) is

ePayment Server (EPS) for HP UX-11

But I dont know the type of channel.

"But I dont know the type of channel."

Only you can tell us that.  EBCDIC, ASCII, BCD?  Length of the length
included or not?  How would we know??  That's in your doc.  Ferret it out
and see if it matches any of the models described in the jPOS Programmers'
Guide.

Read my on-boarding series (assumes you've purchased and have read the
Guide):

http://www.andyorrock.com/2007/01/onboarding_a_ne.html  

http://www.andyorrock.com/2007/05/onboarding_a_ne.html

http://www.andyorrock.com/2007/08/on-boarding-a-n.html  

http://www.andyorrock.com/2007/08/on-boarding-a-1.html  

http://www.andyorrock.com/2007/08/on-boarding-a-2.html  

Andy

From: jpos-users@googlegroups.com [mailto:jpos-users@googlegroups.com] On
Behalf Of Victor Ml. Suarez
Sent: Thursday, July 02, 2009 9:18 AM
To: jpos-users@googlegroups.com
Subject: Re: Steps to send and recieve

Perhaps start by sharing what it is you want to do?

What I need to do is send messages to a terminal (the message is for aprove
or reject a transaction from a POS), the terminal will give me a response
accepting or rejecting the transaction.

So, I'll taka the response and update de database with the approval code.
That's all.

The Interface (where I'm going to connect) is

ePayment Server (EPS) for HP UX-11

But I dont know the type of channel.

Sounds real easy!

No encryption? No security?  No DUKPT?

Sounds like an Issuer system?  Is there a company behind it?

Who owns this terminal?  If they are letting you connect to it, don't
you think they should provide the details of the message exchange they
are expecting you to meet?

Make your first task to find out who can tell you.  You might get lucky
here, but much better to ask the owner of the 'terminal'?

8)

--
Mark