add erlang MAP code (from OTP)
diff --git a/asn1/MAP-Group-Call-Operations.asn b/asn1/MAP-Group-Call-Operations.asn
new file mode 100644
index 0000000..55777fe
--- /dev/null
+++ b/asn1/MAP-Group-Call-Operations.asn
@@ -0,0 +1,72 @@
+MAP-Group-Call-Operations {
+ itu-t identified-organization (4) etsi (0) mobileDomain (0)
+ gsm-Network (1) modules (3) map-Group-Call-Operations (22)
+ version9 (9)}
+
+DEFINITIONS
+
+::=
+
+BEGIN
+
+EXPORTS
+ prepareGroupCall,
+ sendGroupCallEndSignal,
+ forwardGroupCallSignalling,
+ processGroupCallSignalling
+;
+
+IMPORTS
+ OPERATION
+FROM Remote-Operations-Information-Objects {
+joint-iso-itu-t remote-operations(4)
+ informationObjects(5) version1(0)}
+
+ systemFailure,
+ unexpectedDataValue,
+ noGroupCallNumberAvailable
+FROM MAP-Errors {
+ itu-t identified-organization (4) etsi (0) mobileDomain (0)
+ gsm-Network (1) modules (3) map-Errors (10) version9 (9)}
+
+ PrepareGroupCallArg,
+ PrepareGroupCallRes,
+ SendGroupCallEndSignalArg,
+ SendGroupCallEndSignalRes,
+ ForwardGroupCallSignallingArg,
+ ProcessGroupCallSignallingArg
+FROM MAP-GR-DataTypes {
+ itu-t identified-organization (4) etsi (0) mobileDomain (0)
+ gsm-Network (1) modules (3) map-GR-DataTypes (23) version9 (9)}
+
+;
+
+prepareGroupCall OPERATION ::= { --Timer m
+ ARGUMENT
+ PrepareGroupCallArg
+ RESULT
+ PrepareGroupCallRes
+ ERRORS {
+ systemFailure |
+ noGroupCallNumberAvailable |
+ unexpectedDataValue}
+ CODE local:39 }
+
+sendGroupCallEndSignal OPERATION ::= { --Timer l
+ ARGUMENT
+ SendGroupCallEndSignalArg
+ RESULT
+ SendGroupCallEndSignalRes
+ CODE local:40 }
+
+processGroupCallSignalling OPERATION ::= { --Timer s
+ ARGUMENT
+ ProcessGroupCallSignallingArg
+ CODE local:41 }
+
+forwardGroupCallSignalling OPERATION ::= { --Timer s
+ ARGUMENT
+ ForwardGroupCallSignallingArg
+ CODE local:42 }
+
+END