ASN.1 Parameterized Types... pls help

Casper <>
Thu Sep 30 11:55:30 CEST 2004


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 ::= {
  MapSpecificPDUs
  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 |
readyForSM}

The error is as below (Erlang ASN.1 compiler),
      {error,{asn1,[{error,{type,57,
                           'TCAPMessages',
                           'MapSpecificPDUs',
                           {asn1,{duplicates_of_the_tags,
                                     [{'UNIVERSAL','INTEGER'}]}}}}]}}

For your information, I have attached TCAPMessages.asn and
MAP-ShortMessageServiceOperations.asn.

I appreciate if anybody out there can give me some clue to solve this
problem.

Thanks in advance!
Eranga
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