diff --git a/modules/rhizo_base/templates/osmo-nitb-bts.erb b/modules/rhizo_base/templates/osmo-nitb-bts.erb
index 72d6f9d..15cc2fc 100644
--- a/modules/rhizo_base/templates/osmo-nitb-bts.erb
+++ b/modules/rhizo_base/templates/osmo-nitb-bts.erb
@@ -32,7 +32,7 @@
   amr tch-h modes 4 5
   amr tch-h start-mode 1
   gprs mode <%= bts["gprs_m"] %>
-  gprs 11bit_rach_support_for_egprs 0
+  gprs 11bit_rach_support_for_egprs 1
   gprs routing area 21
   gprs network-control-order nc0
   gprs cell bvci <%= index+2 %>
@@ -86,10 +86,10 @@
     phys_chan_config <%= @phys_chan %>
     hopping enabled 0
    timeslot 4
-    phys_chan_config <%= @phys_chan %>
+    phys_chan_config TCH/F_TCH/H_PDCH
     hopping enabled 0
    timeslot 5
-    phys_chan_config <%= @phys_chan %>
+    phys_chan_config TCH/F_TCH/H_PDCH
     hopping enabled 0
    timeslot 6
     phys_chan_config TCH/F_TCH/H_PDCH
diff --git a/modules/rhizo_base/templates/osmo-nitb-head.erb b/modules/rhizo_base/templates/osmo-nitb-head.erb
index 6b4c452..3a29e80 100644
--- a/modules/rhizo_base/templates/osmo-nitb-head.erb
+++ b/modules/rhizo_base/templates/osmo-nitb-head.erb
@@ -88,5 +88,5 @@ network
  handover power budget hysteresis 3
  handover maximum distance 9999
  timer t3109 4
- dyn_ts_allow_tch_f 0
+ dyn_ts_allow_tch_f <% if @mncc_codec == 'AMR' -%>0<% else -%>1<% end %>
  subscriber-keep-in-ram 0