diff --git a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx-hopping.cfg b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx-hopping.cfg
index 36065e2..6730644 100644
--- a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx-hopping.cfg
+++ b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx-hopping.cfg
@@ -60,38 +60,38 @@
    max_power_red 12
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 1
-    timeslot 0
-     phys_chan_config CCCH
-     hopping enabled 0
-     e1 line 0 timeslot 1 sub-slot full
-    timeslot 1
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 2 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 2 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 2 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 3 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 3 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 3 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     hopping enabled 0
-     e1 line 0 timeslot 3 sub-slot 3
+   timeslot 0
+    phys_chan_config CCCH
+    hopping enabled 0
+    e1 line 0 timeslot 1 sub-slot full
+   timeslot 1
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 2 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 2 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 2 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 3 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 3 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 3 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    hopping enabled 0
+    e1 line 0 timeslot 3 sub-slot 3
   trx 1
    rf_locked 0
    arfcn 119
@@ -99,66 +99,66 @@
    max_power_red 12
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 2
-    timeslot 0
-     phys_chan_config SDCCH8
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-    timeslot 1
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 4 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 4 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 4 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 5 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 5 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 5 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     hopping enabled 1
-     hopping sequence-number 0
-     hopping maio 0
-     hopping arfcn add 117
-     hopping arfcn add 119
-     e1 line 0 timeslot 5 sub-slot 3
+   timeslot 0
+    phys_chan_config SDCCH8
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+   timeslot 1
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 4 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 4 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 4 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 5 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 5 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 5 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    hopping enabled 1
+    hopping sequence-number 0
+    hopping maio 0
+    hopping arfcn add 117
+    hopping arfcn add 119
+    e1 line 0 timeslot 5 sub-slot 3
diff --git a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx.cfg b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx.cfg
index ebe6cc6..ca5689f 100644
--- a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx.cfg
+++ b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-1bts-2trx.cfg
@@ -29,56 +29,56 @@
    max_power_red 0
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 1
-    timeslot 0
-     phys_chan_config CCCH+SDCCH4
-     e1 line 0 timeslot 1 sub-slot full
-    timeslot 1
-     phys_chan_config SDCCH8
-     e1 line 0 timeslot 2 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 3
+   timeslot 0
+    phys_chan_config CCCH+SDCCH4
+    e1 line 0 timeslot 1 sub-slot full
+   timeslot 1
+    phys_chan_config SDCCH8
+    e1 line 0 timeslot 2 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 3
   trx 1
    arfcn 123
    max_power_red 0
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 2
-    timeslot 0
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 0
-    timeslot 1
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 3
+   timeslot 0
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 0
+   timeslot 1
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 3
diff --git a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-2bts-2trx.cfg b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-2bts-2trx.cfg
index 9ae8003..4f194c0 100644
--- a/openbsc/doc/examples/osmo-nitb/bs11/openbsc-2bts-2trx.cfg
+++ b/openbsc/doc/examples/osmo-nitb/bs11/openbsc-2bts-2trx.cfg
@@ -27,59 +27,59 @@
    max_power_red 0
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 1
-    timeslot 0
-     phys_chan_config CCCH+SDCCH4
-     e1 line 0 timeslot 1 sub-slot full
-    timeslot 1
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 3
+   timeslot 0
+    phys_chan_config CCCH+SDCCH4
+    e1 line 0 timeslot 1 sub-slot full
+   timeslot 1
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 3
   trx 1
    arfcn 123
    max_power_red 0
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 2
-    timeslot 0
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 0
-    timeslot 1
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 4 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 5 sub-slot 3
+   timeslot 0
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 0
+   timeslot 1
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 4 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 5 sub-slot 3
  bts 1
   type bs11
   band GSM900
@@ -93,56 +93,56 @@
    max_power_red 0
    rsl e1 line 1 timeslot 6 sub-slot full
    rsl e1 tei 1
-    timeslot 0
-     phys_chan_config CCCH+SDCCH4
-     e1 line 1 timeslot 7 sub-slot 0
-    timeslot 1
-     phys_chan_config SDCCH8
-     e1 line 1 timeslot 7 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 7 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 7 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 8 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 8 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 8 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 8 sub-slot 3
+   timeslot 0
+    phys_chan_config CCCH+SDCCH4
+    e1 line 1 timeslot 7 sub-slot 0
+   timeslot 1
+    phys_chan_config SDCCH8
+    e1 line 1 timeslot 7 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 7 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 7 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 8 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 8 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 8 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 8 sub-slot 3
   trx 1
    arfcn 124
    max_power_red 0
    rsl e1 line 1 timeslot 6 sub-slot full
    rsl e1 tei 2
-    timeslot 0
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 9 sub-slot 0
-    timeslot 1
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 9 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 9 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 9 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 10 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 10 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 10 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 1 timeslot 10 sub-slot 3
+   timeslot 0
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 9 sub-slot 0
+   timeslot 1
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 9 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 9 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 9 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 10 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 10 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 10 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 1 timeslot 10 sub-slot 3
diff --git a/openbsc/doc/examples/osmo-nitb/bs11/openbsc.cfg b/openbsc/doc/examples/osmo-nitb/bs11/openbsc.cfg
index 542edd6..6c47a90 100644
--- a/openbsc/doc/examples/osmo-nitb/bs11/openbsc.cfg
+++ b/openbsc/doc/examples/osmo-nitb/bs11/openbsc.cfg
@@ -29,28 +29,28 @@
    max_power_red 0
    rsl e1 line 0 timeslot 1 sub-slot full
    rsl e1 tei 1
-    timeslot 0
-     phys_chan_config CCCH+SDCCH4
-     e1 line 0 timeslot 1 sub-slot full
-    timeslot 1
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 1
-    timeslot 2
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 2
-    timeslot 3
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 2 sub-slot 3
-    timeslot 4
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 0
-    timeslot 5
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 1
-    timeslot 6
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 2
-    timeslot 7
-     phys_chan_config TCH/F
-     e1 line 0 timeslot 3 sub-slot 3
+   timeslot 0
+    phys_chan_config CCCH+SDCCH4
+    e1 line 0 timeslot 1 sub-slot full
+   timeslot 1
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 1
+   timeslot 2
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 2
+   timeslot 3
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 2 sub-slot 3
+   timeslot 4
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 0
+   timeslot 5
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 1
+   timeslot 6
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 2
+   timeslot 7
+    phys_chan_config TCH/F
+    e1 line 0 timeslot 3 sub-slot 3