diff --git a/python/demapping/gsm_sdcch8_demapper.py b/python/demapping/gsm_sdcch8_demapper.py
new file mode 100644
index 0000000..e69d277
--- /dev/null
+++ b/python/demapping/gsm_sdcch8_demapper.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+##################################################
+# GNU Radio Python Flow Graph
+# Title: SDCCH/8 demapper
+# Author: Piotr Krysik
+# Description: Demapper for SDCCH/8 + SACCH/C8 control channels. This corresponds to channel combination vii specified in GSM 05.02, section 6.4
+# Generated: Fri May 20 12:12:04 2016
+##################################################
+
+from gnuradio import gr
+from gnuradio.filter import firdes
+import grgsm
+
+
+class gsm_sdcch8_demapper(grgsm.hier_block):
+
+    def __init__(self, timeslot_nr=1):
+        grgsm.hier_block.__init__(
+            self, "SDCCH/8 demapper",
+            gr.io_signature(0, 0, 0),
+            gr.io_signature(0, 0, 0),
+        )
+        self.message_port_register_hier_in("bursts")
+        self.message_port_register_hier_out("bursts")
+
+        ##################################################
+        # Parameters
+        ##################################################
+        self.timeslot_nr = timeslot_nr
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.gsm_universal_ctrl_chans_demapper_0 = grgsm.universal_ctrl_chans_demapper(timeslot_nr, ([0,0,0,0,4,4,4,4,8,8,8,8,12,12,12,12,16,16,16,16,20,20,20,20,24,24,24,24,28,28,28,28,32,32,32,32,36,36,36,36,40,40,40,40,44,44,44,44,0,0,0]), ([0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0]), ([0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,]), ([136,136,136,136,136,136,136,136,136,136,136,136,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,136,136,136,136]), ([1,1,1,1,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,4,4,4,4]), ([1,1,1,1,2,2,2,2,3,3,3,3,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,5,5,5,5,6,6,6,6,7,7,7,7,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,4,4,4,4,]))
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.msg_connect((self.gsm_universal_ctrl_chans_demapper_0, 'bursts'), (self, 'bursts'))    
+        self.msg_connect((self, 'bursts'), (self.gsm_universal_ctrl_chans_demapper_0, 'bursts'))    
+
+    def get_timeslot_nr(self):
+        return self.timeslot_nr
+
+    def set_timeslot_nr(self, timeslot_nr):
+        self.timeslot_nr = timeslot_nr