diff --git a/openbsc/src/openbsc.cfg.1-1 b/openbsc/src/openbsc.cfg.1-1
index d312843..a25804f 100644
--- a/openbsc/src/openbsc.cfg.1-1
+++ b/openbsc/src/openbsc.cfg.1-1
@@ -31,7 +31,7 @@
      phys_chan_config CCCH+SDCCH4
      e1 line 0 timeslot 1 sub-slot full
     timeslot 1
-     phys_chan_config SDCCH8
+     phys_chan_config TCH/F
      e1 line 0 timeslot 2 sub-slot 1
     timeslot 2
      phys_chan_config TCH/F
diff --git a/openbsc/src/openbsc.cfg.2-2 b/openbsc/src/openbsc.cfg.2-2
index c1468a6..9ae8003 100644
--- a/openbsc/src/openbsc.cfg.2-2
+++ b/openbsc/src/openbsc.cfg.2-2
@@ -31,7 +31,7 @@
      phys_chan_config CCCH+SDCCH4
      e1 line 0 timeslot 1 sub-slot full
     timeslot 1
-     phys_chan_config SDCCH8
+     phys_chan_config TCH/F
      e1 line 0 timeslot 2 sub-slot 1
     timeslot 2
      phys_chan_config TCH/F