diff --git a/library/MGCP_Emulation.ttcn b/library/MGCP_Emulation.ttcn
index b02dc06..0863511 100644
--- a/library/MGCP_Emulation.ttcn
+++ b/library/MGCP_Emulation.ttcn
@@ -441,5 +441,26 @@
 	return omit;
 }
 
+/* Determine encoding name for a specified payload type number */
+function f_encoding_name_from_pt(SDP_FIELD_PayloadType pt) return charstring {
+	if (pt == PT_PCMU) {
+		return "PCMU";
+	} else if (pt == PT_GSM) {
+		return "GSM";
+	} else if (pt == PT_PCMA) {
+		return "PCMA";
+	} else if (pt == PT_GSMEFR) {
+		return "GSM-EFR";
+	} else if (pt == PT_GSMHR) {
+		return "GSM-HR-08";
+	} else if (pt == PT_AMR) {
+		return "AMR";
+	} else if (pt == PT_AMRWB) {
+		return "AMR-WB";
+	}
+
+	setverdict(fail);
+	return "";
+}
 
 }