diff --git a/fakebts/BTS.st b/fakebts/BTS.st
index b283c02..77cd0a7 100644
--- a/fakebts/BTS.st
+++ b/fakebts/BTS.st
@@ -142,6 +142,20 @@ RSLSacchDeactivate extend [
     ]
 ]
 
+RSLEncryptionCommand extend [
+    trxDispatchOn: aTrx with: lchan [
+        <category: '*-BTS-Core'>
+        lchan
+          dataRequest: self l3Information data
+          sapi: (self linkIdentifier data first bitAnd: 2r111).
+    ]
+
+    trxDispatchOn: aTrx [
+        <category: '*-BTS-Core'>
+        self trxChannelDispatch: aTrx.
+    ]
+]
+
 RSLModeModifyRequest extend [
     trxDispatchOn: aTrx with: lchan [
 	| ack |
diff --git a/fakebts/RSLMsg.st b/fakebts/RSLMsg.st
index 128b5d8..c2a765f 100644
--- a/fakebts/RSLMsg.st
+++ b/fakebts/RSLMsg.st
@@ -1022,6 +1022,16 @@ RSLDedicatedChannelManagement subclass: RSLEncryptionCommand [
     <comment: 'I represent a GSM 08.58 GSM 8.4.6 ENCRyption CoMmaD'>
     <rslMessageType: #messageDedEncryptionCommand>
     <rslMessageDefinition: #encryptionCommandMessage>
+
+    l3Information [
+        <category: 'access'>
+        ^ l3_info
+    ]
+
+    linkIdentifier [
+        <category: 'access'>
+        ^ link_id
+    ]
 ]
 
 RSLDedicatedChannelManagement subclass: RSLHandoverDetection [