diff --git a/102232-6/PstnIsdnPDU.asn b/102232-6/PstnIsdnPDU.asn
index 212755aeddc73234a9dc03603650669beb845d7b..c9f363d168aa5a1a6c3ce5de10bc99ee70177a64 100644
--- a/102232-6/PstnIsdnPDU.asn
+++ b/102232-6/PstnIsdnPDU.asn
@@ -1,5 +1,5 @@
 PstnIsdnPDU
-{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) pstnIsdn(6) version3(3)}
+{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) pstnIsdn(6) version4(4)}
 
 DEFINITIONS IMPLICIT TAGS ::=
 BEGIN
@@ -9,12 +9,12 @@ IMPORTS
 	-- from TS 101 671 [1]
 	IPAddress
 		FROM HI2Operations
-		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) hi2(1) version10(10)}
+		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) hi2(1) version16(16)}
 
 	-- from TS 102 232-01 [2]
 	PayloadDirection
 		FROM LI-PS-PDU
-		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) genHeader(1) version8(8)};
+		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) genHeader(1) version13(13)};
 
 
 -- ============================
@@ -23,29 +23,29 @@ IMPORTS
 
 	-- definitions are relative to
 	-- {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulintercept(2)}
-pstnIsdnIRIObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version3(3) iRI(1)}
-pstnIsdnCCObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version3(3) cC(2)}
+pstnIsdnIRIObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version4(4) iRI(1)}
+pstnIsdnCCObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version4(4) cC(2)}
 
 
 -- ===============================
 -- Description of the PstnIsdn IRI
 -- ===============================
 
-PstnIsdnIRI		::= SEQUENCE
+PstnIsdnIRI ::= SEQUENCE
 {
-	pstnIsdnIRIObjId 		[0] RELATIVE-OID,
-	pstnIsdnIRIContents 	[1] PstnIsdnIRIContents
+	pstnIsdnIRIObjId		[0] RELATIVE-OID,
+	pstnIsdnIRIContents		[1] PstnIsdnIRIContents
 }
 
-PstnIsdnIRIContents	::= CHOICE
+PstnIsdnIRIContents ::= CHOICE
 {
-	supplementaryInfo 		[0] SupplementaryInfo,
+	supplementaryInfo		[0] SupplementaryInfo,
 	...
 }
 
-SupplementaryInfo		::= SEQUENCE
+SupplementaryInfo ::= SEQUENCE
 {
-	informationAppliesTo 	[0] InformationAppliesTo,
+	informationAppliesTo	[0] InformationAppliesTo,
 		-- Identifies the PDUs to which this info applies
 	mediaFormat				[1] INTEGER (0..127),
 		-- As defined in RFC 3551 [10]
@@ -66,10 +66,10 @@ SupplementaryInfo		::= SEQUENCE
 		-- May be omitted if all headers are present.
 }
 
-InformationAppliesTo	::= SEQUENCE
+InformationAppliesTo ::= SEQUENCE
 	-- Identifies the PDUs to which a piece of supplementary information applies
 {
-	payloadDirection		[0] PayloadDirection, 
+	payloadDirection		[0] 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
@@ -78,7 +78,7 @@ InformationAppliesTo	::= SEQUENCE
 	...
 }
 
-FrameType	::= ENUMERATED
+FrameType ::= ENUMERATED
 {
 	ipFrame(0),
 		-- All headers are present
@@ -88,16 +88,18 @@ FrameType	::= ENUMERATED
 		-- UDP and IP headers are missing
 	audioFrame(3),
 		-- All headers are missing
-	...
+	...,
+	artificialRtpFrame(4)
+		-- UDP and IP headers are missing, artificial RTP frame has been added
 }
 
 -- ==============================
 -- Description of the PstnIsdn CC
 -- ==============================
 
-PstnIsdnCC		::= SEQUENCE
+PstnIsdnCC ::= SEQUENCE
 {
-	pstnIsdnCCObjId 		[0] RELATIVE-OID,
+	pstnIsdnCCObjId			[0] RELATIVE-OID,
 	pstnIsdnCCContents		[1] OCTET STRING,
 		-- See clause 6.2 for definition of format of PstnIsdn CC
 	cCLinkID				[2] INTEGER (0..65535) OPTIONAL,
diff --git a/102232-6/portal/PstnIsdnPDU, ver3.txt b/102232-6/portal/PstnIsdnPDU,ver4.txt
similarity index 75%
rename from 102232-6/portal/PstnIsdnPDU, ver3.txt
rename to 102232-6/portal/PstnIsdnPDU,ver4.txt
index 212755aeddc73234a9dc03603650669beb845d7b..c9f363d168aa5a1a6c3ce5de10bc99ee70177a64 100644
--- a/102232-6/portal/PstnIsdnPDU, ver3.txt	
+++ b/102232-6/portal/PstnIsdnPDU,ver4.txt
@@ -1,5 +1,5 @@
 PstnIsdnPDU
-{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) pstnIsdn(6) version3(3)}
+{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) pstnIsdn(6) version4(4)}
 
 DEFINITIONS IMPLICIT TAGS ::=
 BEGIN
@@ -9,12 +9,12 @@ IMPORTS
 	-- from TS 101 671 [1]
 	IPAddress
 		FROM HI2Operations
-		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) hi2(1) version10(10)}
+		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) hi2(1) version16(16)}
 
 	-- from TS 102 232-01 [2]
 	PayloadDirection
 		FROM LI-PS-PDU
-		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) genHeader(1) version8(8)};
+		{itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulIntercept(2) li-ps(5) genHeader(1) version13(13)};
 
 
 -- ============================
@@ -23,29 +23,29 @@ IMPORTS
 
 	-- definitions are relative to
 	-- {itu-t(0) identified-organization(4) etsi(0) securityDomain(2) lawfulintercept(2)}
-pstnIsdnIRIObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version3(3) iRI(1)}
-pstnIsdnCCObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version3(3) cC(2)}
+pstnIsdnIRIObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version4(4) iRI(1)}
+pstnIsdnCCObjId RELATIVE-OID	::= {li-ps(5) pstnIsdn(6) version4(4) cC(2)}
 
 
 -- ===============================
 -- Description of the PstnIsdn IRI
 -- ===============================
 
-PstnIsdnIRI		::= SEQUENCE
+PstnIsdnIRI ::= SEQUENCE
 {
-	pstnIsdnIRIObjId 		[0] RELATIVE-OID,
-	pstnIsdnIRIContents 	[1] PstnIsdnIRIContents
+	pstnIsdnIRIObjId		[0] RELATIVE-OID,
+	pstnIsdnIRIContents		[1] PstnIsdnIRIContents
 }
 
-PstnIsdnIRIContents	::= CHOICE
+PstnIsdnIRIContents ::= CHOICE
 {
-	supplementaryInfo 		[0] SupplementaryInfo,
+	supplementaryInfo		[0] SupplementaryInfo,
 	...
 }
 
-SupplementaryInfo		::= SEQUENCE
+SupplementaryInfo ::= SEQUENCE
 {
-	informationAppliesTo 	[0] InformationAppliesTo,
+	informationAppliesTo	[0] InformationAppliesTo,
 		-- Identifies the PDUs to which this info applies
 	mediaFormat				[1] INTEGER (0..127),
 		-- As defined in RFC 3551 [10]
@@ -66,10 +66,10 @@ SupplementaryInfo		::= SEQUENCE
 		-- May be omitted if all headers are present.
 }
 
-InformationAppliesTo	::= SEQUENCE
+InformationAppliesTo ::= SEQUENCE
 	-- Identifies the PDUs to which a piece of supplementary information applies
 {
-	payloadDirection		[0] PayloadDirection, 
+	payloadDirection		[0] 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
@@ -78,7 +78,7 @@ InformationAppliesTo	::= SEQUENCE
 	...
 }
 
-FrameType	::= ENUMERATED
+FrameType ::= ENUMERATED
 {
 	ipFrame(0),
 		-- All headers are present
@@ -88,16 +88,18 @@ FrameType	::= ENUMERATED
 		-- UDP and IP headers are missing
 	audioFrame(3),
 		-- All headers are missing
-	...
+	...,
+	artificialRtpFrame(4)
+		-- UDP and IP headers are missing, artificial RTP frame has been added
 }
 
 -- ==============================
 -- Description of the PstnIsdn CC
 -- ==============================
 
-PstnIsdnCC		::= SEQUENCE
+PstnIsdnCC ::= SEQUENCE
 {
-	pstnIsdnCCObjId 		[0] RELATIVE-OID,
+	pstnIsdnCCObjId			[0] RELATIVE-OID,
 	pstnIsdnCCContents		[1] OCTET STRING,
 		-- See clause 6.2 for definition of format of PstnIsdn CC
 	cCLinkID				[2] INTEGER (0..65535) OPTIONAL,