[OSS_ASN1] [ASN1] ASN.1 Parameterized Types... pls help

Casper <>
Fri Oct 1 06:17:09 CEST 2004

Hi William,


Thanks for the advice.


This is for a R&D project. We plan to look at the feasibility of using
Erlang/OTP platform for development. Currently doing investigation on ASN.1
compiler on Erlang. I'm very new to ASN.1, so find it difficult to capture
some parts of the specification. The GSM/UMTS MAP ASN.1 spec is alright. But
I couldn't still figure out how to use TCAP ASN.1 spec can generate the TCAP
Begin, Continue, End, etc message encoding/decoding functions.


With help from some generous people out there, I could understand that I
will have to create the ASN.1 spec of mine or find a standard spec, which
will Instantiate the Parameterized Type specified in the TCAP. If you could
point me to a standard spec like that or give me a sample how I could write
something like that, would be very helpful. How to blend the MAP and TCAP
ASN.1 specs?








From: William H. Skelton [mailto:] 
Sent: Friday, October 01, 2004 3:12 AM
Subject: Fwd: [OSS_ASN1] [ASN1] ASN.1 Parameterized Types... pls help


Hi Eranga,

We found you can avoid some of the problems by using earlier TCAP
specifications, which are fully compatible (I think), but simpler.

Just as a matter of interest, is this a commercial or university project you
are working on?  Are you building your own tools?


From: "Casper" <>
To: <>, <>
Date: Wed, 29 Sep 2004 18:07:45 +0600
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Subject: [OSS_ASN1] [ASN1] ASN.1 Parameterized Types... pls help
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Hi All,
I'm finding difficult in absorbing "How to use ASN.1 TCAPMessage to
transport GSM MAP". The problem is how to generate TCAP Begin, Continue,
End, etc messages.
I read about the ASN.1 Parameterized Type, but still I could find the match
of ASN.1 specs for MAP and TCAP. I thought below might be the way, but still
that gives some compilation errors.
mapSpecificAS ABSTRACT-SYNTAX ::= {
  IDENTIFIED BY  gsm-MessagingId
MapSpecificPDUs ::=
  TCMessage{{ MAPOperations-Invokable}, { MAPOperations-Returnable}}
MAPOperations-Invokable OPERATION ::= 
      {sendRoutingInfoForSM | mo-ForwardSM | mt-ForwardSM} 
MAPOperations-Returnable OPERATION ::= 
      {reportSM-DeliveryStatus | alertServiceCentre | informServiceCentre |
The error is as below (Erlang ASN.1 compiler),
For your information, I have attached TCAPMessages.asn and
I appreciate if anybody out there can give me some clue to solve this
Thanks in advance!

ASN1 mailing list



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