How to get the heel of RAS Message.

Delphi qizj at CAPITEL.COM.CN
Tue May 8 02:52:50 EDT 2001

Hi, all:

I have two problems concerning H.323 ASN.1.

H.323 ASN.1 states as follows:
    h323-uu-pdu  H323-UU-PDU,
    user-data      SEQUENCE
       protocol-discriminator    INTEGER  (0..255),
       user-information            OCTET STRING (SIZE(1..131)),
My question is," What's the use of "user-date" field and what its
protocol-discriminator field stand for? " Can anyone present me an example?

The H.323 ASN.1 tells us that following the path
"H323-UserInformation>>h323-uu-pdu>>h323-message-body", we can get and set
UUIE of Q931 messages. But how can we do the same thing with RAS messages?
Or, what are the "ABSOLUTE PATH", the root, of the messages?

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