diff --git a/upf/CPF_ConnectionHandler.ttcn b/upf/CPF_ConnectionHandler.ttcn
new file mode 100644
index 0000000..25f99b9
--- /dev/null
+++ b/upf/CPF_ConnectionHandler.ttcn
@@ -0,0 +1,123 @@
+module CPF_ConnectionHandler {
+
+/* CPF Connection Handler of UPF_Tests in TTCN-3
+ * (C) 2022 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+import from Misc_Helpers all;
+import from General_Types all;
+import from Osmocom_Types all;
+import from IPL4asp_Types all;
+import from Native_Functions all;
+
+import from StatsD_Checker all;
+
+import from TELNETasp_PortType all;
+import from Osmocom_VTY_Functions all;
+
+import from PFCP_Types all;
+import from PFCP_Emulation all;
+
+/* The system under test is a UPF (User Plane Function).  This component represents a Control Plane Function, with a
+ * single association via PFCP to the UPF (User Plane Function). */
+type component CPF_ConnHdlr extends StatsD_ConnHdlr {
+	port PFCPEM_PT PFCP;
+	port TELNETasp_PT UPFVTY;
+
+	var PFCP_Emulation_CT vc_PFCP;
+
+	var TestHdlrParams g_pars;
+
+	var boolean g_vty_initialized := false;
+	var integer g_recovery_timestamp;
+	var integer g_next_seid_state;
+	var integer g_next_local_teid_state;
+	var integer g_next_remote_teid_state;
+	var integer g_next_ue_addr_state;
+}
+
+function f_next_seid() runs on CPF_ConnHdlr return OCT8 {
+	g_next_seid_state := g_next_seid_state + 1;
+	return int2oct(g_next_seid_state, 8);
+}
+
+function f_next_local_teid() runs on CPF_ConnHdlr return OCT4 {
+	g_next_local_teid_state := g_next_local_teid_state + 1;
+	return int2oct(g_next_local_teid_state, 4);
+}
+
+function f_next_remote_teid() runs on CPF_ConnHdlr return OCT4 {
+	g_next_remote_teid_state := g_next_remote_teid_state + 1;
+	return int2oct(g_next_remote_teid_state, 4);
+}
+
+function f_next_ue_addr() runs on CPF_ConnHdlr return charstring {
+	g_next_ue_addr_state := g_next_ue_addr_state + 1;
+	if (g_next_ue_addr_state > 254) {
+		g_next_ue_addr_state := 16;
+	}
+	return "192.168.44." & int2str(g_next_ue_addr_state);
+}
+
+function f_CPF_ConnHdlr_init_vty() runs on CPF_ConnHdlr {
+	if (not g_vty_initialized) {
+		map(self:UPFVTY, system:UPFVTY);
+		f_vty_set_prompts(UPFVTY);
+		f_vty_transceive(UPFVTY, "enable");
+		g_vty_initialized := true;
+	}
+}
+
+private function f_CPF_ConnHdlr_init_pfcp(charstring id) runs on CPF_ConnHdlr {
+	id := id & "-PFCP";
+
+	g_recovery_timestamp := f_rnd_int(4294967295);
+	g_next_seid_state := (1 + f_rnd_int(65534)) * 65536;
+	g_next_local_teid_state := (1 + f_rnd_int(65534)) * 65536;
+	g_next_remote_teid_state := (1 + f_rnd_int(65534)) * 65536;
+	g_next_ue_addr_state := (1 + f_rnd_int(15)) * 16;
+
+	var PFCP_Emulation_Cfg pfcp_cfg := {
+		pfcp_bind_ip := g_pars.local_addr,
+		pfcp_bind_port := g_pars.local_port,
+		pfcp_remote_ip := g_pars.remote_upf_addr,
+		pfcp_remote_port := g_pars.remote_upf_port,
+		role := CPF
+	};
+
+	vc_PFCP := PFCP_Emulation_CT.create(id) alive;
+	connect(self:PFCP, vc_PFCP:CLIENT);
+	vc_PFCP.start(PFCP_Emulation.main(pfcp_cfg));
+}
+
+/* initialize all parameters */
+function f_CPF_ConnHdlr_init(charstring id, TestHdlrParams pars) runs on CPF_ConnHdlr {
+	g_pars := valueof(pars);
+	f_CPF_ConnHdlr_init_pfcp(id);
+	f_CPF_ConnHdlr_init_vty();
+}
+
+type record TestHdlrParams {
+	charstring remote_upf_addr,
+	integer remote_upf_port,
+	charstring local_addr,
+	integer local_port,
+	Node_ID local_node_id
+};
+
+/* Note: Do not use valueof() to get a value of this template, use
+ * f_gen_test_hdlr_pars() instead in order to get a configuration. */
+template (value) TestHdlrParams t_def_TestHdlrPars := {
+	remote_upf_addr := "127.0.0.1",
+	remote_upf_port := 8805,
+	local_addr := "127.0.0.2",
+	local_port := 8805
+}
+
+}