TS 102 232-6 CR009: simplify OID versioning. fully qualify imports

Add common pstnIsdnPDUObjId.

Fully qualify type names by prefixing with the module name
that they're imported from.

Remove leading comment block for consistency with
the other 102 232 ASN.1.

102232-6/PstnIsdnPDU.asn

--- ===============================
--- Description of the PstnIsdn PDU
--- ===============================
-
 PstnIsdnPDU
 {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) pstnIsdn(6) version5(5)}
 
@@ -10,8 +6,6 @@ BEGIN
 
 IMPORTS
 
-	
-
 	-- from TS 102 232-01 [2]
 	PayloadDirection
 		FROM LI-PS-PDU
@@ -22,10 +16,12 @@ IMPORTS
 -- Object Identifier Definition
 -- ============================
 
+pstnIsdnPDUObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version5(5)}
+pstnIsdnIRIObjId RELATIVE-OID	::= {pstnIsdnPDUObjId iRI(1)}
+pstnIsdnCCObjId RELATIVE-OID	::= {pstnIsdnPDUObjId cC(2)}
+
 	-- definitions are relative to
 	-- {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulintercept(2)}
-pstnIsdnIRIObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version5(5) iRI(1)}
-pstnIsdnCCObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version5(5) cC(2)}
 
 
 -- ===============================
@@ -74,7 +70,7 @@ SupplementaryInfo ::= SEQUENCE
 InformationAppliesTo ::= SEQUENCE
 	-- Identifies the PDUs to which a piece of supplementary information applies
 {
-	payloadDirection		[0] PayloadDirection,
+	payloadDirection		[0] LI-PS-PDU.PayloadDirection,
 		-- The direction of the traffic to which this info applies
 	cCLinkID				[1] INTEGER (0..65535) OPTIONAL,
 		-- If there are multiple CCLinks, this field states CCLink to which this info applies