diff --git a/grc/decoding/gsm_tch_h_decoder.xml b/grc/decoding/gsm_tch_h_decoder.xml
index 895104e..3936336 100644
--- a/grc/decoding/gsm_tch_h_decoder.xml
+++ b/grc/decoding/gsm_tch_h_decoder.xml
@@ -3,54 +3,27 @@
   <name>TCH/H decoder</name>
   <key>gsm_tch_h_decoder</key>
   <import>import grgsm</import>
-  <make>grgsm.tch_h_decoder($sub_channel, $mode, $boundary_check)</make>
+  <make>grgsm.tch_h_decoder($sub_channel, $multi_rate, $boundary_check)</make>
 
   <param>
-    <name>sub-channel number</name>
+    <name>Sub-channel number</name>
     <key>sub_channel</key>
     <value>0</value>
     <type>int</type>
+    <hide>none</hide>
     <option>
-      <name>sub-channel 0</name>
+      <name>0</name>
       <key>0</key>
     </option>
     <option>
-      <name>sub-channel 1</name>
+      <name>1</name>
       <key>1</key>
     </option>
   </param>
   <param>
-    <name>TCH/H coding mode</name>
-    <key>mode</key>
-    <type>enum</type>
-    <option>
-      <name>GSM-HS</name>
-      <key>grgsm.TCH_HS</key>
-    </option>
-    <option>
-      <name>GSM-AMR 7.95</name>
-      <key>grgsm.TCH_AHS7_95</key>
-    </option>
-    <option>
-      <name>GSM-AMR 7.4</name>
-      <key>grgsm.TCH_AHS7_4</key>
-    </option>
-    <option>
-      <name>GSM-AMR 6.7</name>
-      <key>grgsm.TCH_AHS6_7</key>
-    </option>
-    <option>
-      <name>GSM-AMR 5.9</name>
-      <key>grgsm.TCH_AHS5_9</key>
-    </option>
-    <option>
-      <name>GSM-AMR 5.15</name>
-      <key>grgsm.TCH_AHS5_15</key>
-    </option>
-    <option>
-      <name>GSM-AMR 4.75</name>
-      <key>grgsm.TCH_AHS4_75</key>
-    </option>
+    <name>MultiRate configuration</name>
+    <key>multi_rate</key>
+    <type>string</type>
   </param>
   <param>
     <name>Voice boundary detection</name>
@@ -83,6 +56,11 @@
   </source>
 
   <doc>
+The MultiRate configuration string should contains the hex string from the
+MultiRate configuration element from the Assignment Command message.
+Example: 28111a40.
+See 3GPP TS 44.018 - 10.5.2.21aa MultiRate configuratio
+
 If "Voice boundary detection" is enabled, then only bursts are decoded as voice where
 
 - the framenumber is greater then the framenumber of a received "Connect" or "Connect Acknowlegde" message, and