diff --git a/pymodbus/client/serial.py b/pymodbus/client/serial.py
index a94502624..5f688947e 100644
--- a/pymodbus/client/serial.py
+++ b/pymodbus/client/serial.py
@@ -82,6 +82,8 @@ def __init__(  # pylint: disable=too-many-arguments
                 "Serial client requires pyserial "
                 'Please install with "pip install pyserial" and try again.'
             )
+        if framer not in [FramerType.ASCII, FramerType.RTU]:
+            raise TypeError("Only FramerType RTU/ASCII allowed.")
         self.comm_params = CommParams(
             comm_type=CommType.SERIAL,
             host=port,
@@ -163,6 +165,8 @@ def __init__(  # pylint: disable=too-many-arguments
         retries: int = 3,
     ) -> None:
         """Initialize Modbus Serial Client."""
+        if framer not in [FramerType.ASCII, FramerType.RTU]:
+            raise TypeError("Only RTU/ASCII allowed.")
         self.comm_params = CommParams(
             comm_type=CommType.SERIAL,
             host=port,
diff --git a/pymodbus/client/tcp.py b/pymodbus/client/tcp.py
index 0983f2c19..d38b8e871 100644
--- a/pymodbus/client/tcp.py
+++ b/pymodbus/client/tcp.py
@@ -66,6 +66,8 @@ def __init__(  # pylint: disable=too-many-arguments
     ) -> None:
         """Initialize Asyncio Modbus TCP Client."""
         if not hasattr(self,"comm_params"):
+            if framer not in [FramerType.SOCKET, FramerType.RTU, FramerType.ASCII]:
+                raise TypeError("Only FramerType SOCKET/RTU/ASCII allowed.")
             self.comm_params = CommParams(
                 comm_type=CommType.TCP,
                 host=host,
@@ -138,6 +140,8 @@ def __init__(
     ) -> None:
         """Initialize Modbus TCP Client."""
         if not hasattr(self,"comm_params"):
+            if framer not in [FramerType.SOCKET, FramerType.RTU, FramerType.ASCII]:
+                raise TypeError("Only FramerType SOCKET/RTU/ASCII allowed.")
             self.comm_params = CommParams(
                 comm_type=CommType.TCP,
                 host=host,
diff --git a/pymodbus/client/tls.py b/pymodbus/client/tls.py
index 0b4d6a44c..6667a675c 100644
--- a/pymodbus/client/tls.py
+++ b/pymodbus/client/tls.py
@@ -65,6 +65,8 @@ def __init__(  # pylint: disable=too-many-arguments
         on_connect_callback: Callable[[bool], None] | None = None,
     ):
         """Initialize Asyncio Modbus TLS Client."""
+        if framer not in [FramerType.TLS]:
+            raise TypeError("Only FramerType TLS allowed.")
         self.comm_params = CommParams(
             comm_type=CommType.TLS,
             host=host,
@@ -159,6 +161,8 @@ def __init__(  # pylint: disable=too-many-arguments
         retries: int = 3,
     ):
         """Initialize Modbus TLS Client."""
+        if framer not in [FramerType.TLS]:
+            raise TypeError("Only FramerType TLS allowed.")
         self.comm_params = CommParams(
             comm_type=CommType.TLS,
             host=host,
diff --git a/pymodbus/client/udp.py b/pymodbus/client/udp.py
index 86c05895f..c00064da2 100644
--- a/pymodbus/client/udp.py
+++ b/pymodbus/client/udp.py
@@ -77,6 +77,8 @@ def __init__(  # pylint: disable=too-many-arguments
             reconnect_delay_max=reconnect_delay_max,
             timeout_connect=timeout,
         )
+        if framer not in [FramerType.SOCKET, FramerType.RTU, FramerType.ASCII]:
+            raise TypeError("Only FramerType SOCKET/RTU/ASCII allowed.")
         ModbusBaseClient.__init__(
             self,
             framer,
@@ -139,6 +141,8 @@ def __init__(
         retries: int = 3,
     ) -> None:
         """Initialize Modbus UDP Client."""
+        if framer not in [FramerType.SOCKET, FramerType.RTU, FramerType.ASCII]:
+            raise TypeError("Only FramerType SOCKET/RTU/ASCII allowed.")
         self.comm_params = CommParams(
             comm_type=CommType.UDP,
             host=host,
diff --git a/test/sub_client/test_client.py b/test/sub_client/test_client.py
index 7c0861a56..281f6816d 100755
--- a/test/sub_client/test_client.py
+++ b/test/sub_client/test_client.py
@@ -167,9 +167,9 @@ def fake_execute(_self, _no_response_expected, request):
             "tls": {
                 "pos_arg": "192.168.1.2",
                 "opt_args": {
-                    "port": 211,
-                    "framer": FramerType.ASCII,
-                    "source_address": ("195.6.7.8", 1025),
+                    "port": 802,
+                    "framer": FramerType.TLS,
+                    "source_address": None,
                     "sslctx": None,
                 },
                 "defaults": {
diff --git a/test/sub_client/test_client_sync.py b/test/sub_client/test_client_sync.py
index 529c18787..ac42b6bd9 100755
--- a/test/sub_client/test_client_sync.py
+++ b/test/sub_client/test_client_sync.py
@@ -17,7 +17,6 @@
 from pymodbus.framer import (
     FramerAscii,
     FramerRTU,
-    FramerSocket,
     FramerTLS,
 )
 from test.conftest import mockSocket
@@ -313,10 +312,6 @@ def test_sync_serial_client_instantiation(self):
             ModbusSerialClient("/dev/null", framer=FramerType.RTU).framer,
             FramerRTU,
         )
-        assert isinstance(
-            ModbusSerialClient("/dev/null", framer=FramerType.SOCKET).framer,
-            FramerSocket,
-        )
 
     def test_sync_serial_rtu_client_timeouts(self):
         """Test sync serial rtu."""