diff --git a/modules/rhizomatica_base_system/manifests/init.pp b/modules/rhizomatica_base_system/manifests/init.pp
index 4c7c10d..07731c9 100644
--- a/modules/rhizomatica_base_system/manifests/init.pp
+++ b/modules/rhizomatica_base_system/manifests/init.pp
@@ -33,6 +33,8 @@ class rhizomatica_base_system {
   $pbxcode      = hiera('rhizo::pbxcode')
   # network name
   $network_name = hiera('rhizo::network_name')
+  $arfcn_1      = hiera('rhizo::arfcn_1')
+  $arfcn_2      = hiera('rhizo::arfcn_2')
 
   # VPN ip address
   $vpn_ip_address = hiera('rhizo::vpn_ip_address')
diff --git a/modules/rhizomatica_base_system/templates/osmo-nitb.cfg.erb b/modules/rhizomatica_base_system/templates/osmo-nitb.cfg.erb
index 54f522e..e253854 100644
--- a/modules/rhizomatica_base_system/templates/osmo-nitb.cfg.erb
+++ b/modules/rhizomatica_base_system/templates/osmo-nitb.cfg.erb
@@ -103,7 +103,7 @@ network
   no force-combined-si
   trx 0
    rf_locked 0
-   arfcn 249
+   arfcn <%= @arfcn_1 %>
    nominal power 37
    max_power_red 0
    rsl e1 tei 0
@@ -155,7 +155,7 @@ network
   no force-combined-si
   trx 0
    rf_locked 0
-   arfcn 251
+   arfcn <%= @arfcn_2 %>
    nominal power 37
    max_power_red 0
    rsl e1 tei 0