diff --git a/modules/rhizo_base/files/etc/freeswitch/autoload_configs/amr.conf.xml b/modules/rhizo_base/files/etc/freeswitch/autoload_configs/amr.conf.xml
index 7e3f069..f3149ce 100644
--- a/modules/rhizo_base/files/etc/freeswitch/autoload_configs/amr.conf.xml
+++ b/modules/rhizo_base/files/etc/freeswitch/autoload_configs/amr.conf.xml
@@ -3,7 +3,7 @@
   <settings name="default">
     <!-- AMR mode set (see RFC 4867) -->
     <!-- param name="mode-set" value="0,1,2,3,4,5,6,7" /-->
-    <param name="mode-set" value="4,5" />
+    <param name="mode-set" value="4" />
 
     <!-- enable octet alignment -->
     <param name="octet-align" value="1"/>
diff --git a/modules/rhizo_base/templates/osmo-nitb.cfg.erb b/modules/rhizo_base/templates/osmo-nitb.cfg.erb
index e495832..5782dba 100644
--- a/modules/rhizo_base/templates/osmo-nitb.cfg.erb
+++ b/modules/rhizo_base/templates/osmo-nitb.cfg.erb
@@ -110,7 +110,7 @@ network
   neighbor-list mode automatic
   <% if @mncc_codec == 'AMR' -%>codec-support fr amr
   amr tch-h modes 4 5
-  amr tch-h start-mode 4
+  amr tch-h start-mode 1
 <% else -%>codec-support fr
 <% end -%>
 <% if @gprs == 'active' -%>  gprs mode gprs
@@ -218,7 +218,7 @@ network
   neighbor-list mode automatic
   <% if @mncc_codec == 'AMR' -%>codec-support fr amr
   amr tch-h modes 4 5
-  amr tch-h start-mode 4
+  amr tch-h start-mode 1
 <% else -%>codec-support fr
 <% end -%>
 <% if @gprs == 'active' -%>  gprs mode gprs