diff --git a/src/osmo_gsm_tester/bts_octphy.py b/src/osmo_gsm_tester/bts_octphy.py
index f25823c..fd8d078 100644
--- a/src/osmo_gsm_tester/bts_octphy.py
+++ b/src/osmo_gsm_tester/bts_octphy.py
@@ -20,56 +20,21 @@
 import os
 import pprint
 import tempfile
-from . import log, config, util, template, process, event_loop, pcu_osmo
+from . import log, config, util, template, process, event_loop, pcu_osmo, bts_osmo
 
-class OsmoBtsOctphy(log.Origin):
-    suite_run = None
-    bsc = None
-    sgsn = None
+class OsmoBtsOctphy(bts_osmo.OsmoBtsMainUnit):
     run_dir = None
     inst = None
     env = None
-    pcu_sk_tmp_dir = None
-    values = None
-    lac = None
-    rac = None
-    cellid = None
-    bvci = None
-    proc_bts = None
-    _pcu = None
 
     BIN_BTS_OCTPHY = 'osmo-bts-octphy'
 
     CONF_BTS_OCTPHY = 'osmo-bts-octphy.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(log.C_RUN, OsmoBtsOctphy.BIN_BTS_OCTPHY)
-        self.suite_run = suite_run
-        self.conf = conf
+        super().__init__(suite_run, conf, OsmoBtsOctphy.BIN_BTS_OCTPHY)
         self.env = {}
         self.values = {}
-        self.pcu_sk_tmp_dir = tempfile.mkdtemp('', 'ogtpcusk')
-        if len(self.pcu_socket_path().encode()) > 107:
-            raise log.Error('Path for pcu socket is longer than max allowed len for unix socket path (107):', self.pcu_socket_path())
-
-    def cleanup(self):
-        if self.pcu_sk_tmp_dir:
-            try:
-                os.remove(self.pcu_socket_path())
-            except OSError:
-                pass
-            os.rmdir(self.pcu_sk_tmp_dir)
-
-    def pcu(self):
-        if self._pcu is None:
-            self._pcu = pcu_osmo.OsmoPcu(self.suite_run, self, self.conf)
-        return self._pcu
-
-    def pcu_socket_path(self):
-        return os.path.join(self.pcu_sk_tmp_dir, 'pcu_bts')
-
-    def remote_addr(self):
-        return self.conf.get('addr')
 
     def start(self):
         if self.bsc is None:
@@ -185,27 +150,4 @@
         self.dbg(conf=values)
         return values
 
-    def ready_for_pcu(self):
-        if not self.proc_bts or not self.proc_bts.is_running:
-            return False
-        return 'BTS is up' in (self.proc_bts.get_stderr() or '')
-
-    def set_bsc(self, bsc):
-        self.bsc = bsc
-
-    def set_sgsn(self, sgsn):
-        self.sgsn = sgsn
-
-    def set_lac(self, lac):
-        self.lac = lac
-
-    def set_rac(self, rac):
-        self.rac = rac
-
-    def set_cellid(self, cellid):
-        self.cellid = cellid
-
-    def set_bvci(self, bvci):
-        self.bvci = bvci
-
 # vim: expandtab tabstop=4 shiftwidth=4
diff --git a/src/osmo_gsm_tester/bts_osmo.py b/src/osmo_gsm_tester/bts_osmo.py
new file mode 100644
index 0000000..16e79cf
--- /dev/null
+++ b/src/osmo_gsm_tester/bts_osmo.py
@@ -0,0 +1,146 @@
+# osmo_gsm_tester: base classes to share code among BTS subclasses.
+#
+# Copyright (C) 2016-2017 by sysmocom - s.f.m.c. GmbH
+#
+# Author: Pau Espin Pedrol <pespin@sysmocom.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import pprint
+import tempfile
+from abc import ABCMeta, abstractmethod
+from . import log, config, util, template, process, event_loop, pcu_osmo
+
+class OsmoBts(log.Origin, metaclass=ABCMeta):
+    suite_run = None
+    proc_bts = None
+    bsc = None
+    sgsn = None
+    lac = None
+    rac = None
+    cellid = None
+    bvci = None
+    _pcu = None
+
+##############
+# PROTECTED
+##############
+    def __init__(self, suite_run, conf, name):
+        super().__init__(log.C_RUN, name)
+        self.suite_run = suite_run
+        self.conf = conf
+        if len(self.pcu_socket_path().encode()) > 107:
+            raise log.Error('Path for pcu socket is longer than max allowed len for unix socket path (107):', self.pcu_socket_path())
+
+########################
+# PUBLIC - INTERNAL API
+########################
+    @abstractmethod
+    def conf_for_bsc(self):
+        'Used by bsc objects to get path to socket.'
+        pass
+
+    @abstractmethod
+    def pcu_socket_path(self):
+        'Used by pcu objects to get path to socket.'
+        pass
+
+    @abstractmethod
+    def create_pcu(self):
+        'Used by base class. Subclass can create different pcu implementations.'
+        pass
+
+    def remote_addr(self):
+        return self.conf.get('addr')
+
+    def ready_for_pcu(self):
+        if not self.proc_bts or not self.proc_bts.is_running:
+            return False
+        return 'BTS is up' in (self.proc_bts.get_stderr() or '')
+
+    def cleanup(self):
+        'Nothing to do by default. Subclass can override if required.'
+        pass
+
+###################
+# PUBLIC (test API included)
+###################
+    @abstractmethod
+    def start(self):
+        'Starts BTS proccess and sets self.proc_bts with an object of Process interface'
+        pass
+
+    def pcu(self):
+        if self._pcu is None:
+            self._pcu = self.create_pcu(self.suite_run, self, self.conf)
+        return self._pcu
+
+    def set_bsc(self, bsc):
+        self.bsc = bsc
+
+    def set_sgsn(self, sgsn):
+        self.sgsn = sgsn
+
+    def set_lac(self, lac):
+        self.lac = lac
+
+    def set_rac(self, rac):
+        self.rac = rac
+
+    def set_cellid(self, cellid):
+        self.cellid = cellid
+
+    def set_bvci(self, bvci):
+        self.bvci = bvci
+
+
+class OsmoBtsMainUnit(OsmoBts, metaclass=ABCMeta):
+##############
+# PROTECTED
+##############
+    pcu_sk_tmp_dir = None
+
+    def __init__(self, suite_run, conf, name):
+        super().__init__(suite_run, conf, name)
+
+########################
+# PUBLIC - INTERNAL API
+########################
+    @abstractmethod
+    def conf_for_bsc(self):
+        pass
+
+    def cleanup(self):
+        if self.pcu_sk_tmp_dir:
+            try:
+                os.remove(self.pcu_socket_path())
+            except OSError:
+                pass
+            os.rmdir(self.pcu_sk_tmp_dir)
+
+    def create_pcu(self):
+        return pcu_osmo.OsmoPcu(self.suite_run, self, self.conf)
+
+    def pcu_socket_path(self):
+        if self.pcu_sk_tmp_dir is None:
+            self.pcu_sk_tmp_dir = tempfile.mkdtemp('', 'ogtpcusk')
+        return os.path.join(self.pcu_sk_tmp_dir, 'pcu_bts')
+
+###################
+# PUBLIC (test API included)
+###################
+    @abstractmethod
+    def start(self):
+        pass
diff --git a/src/osmo_gsm_tester/bts_osmotrx.py b/src/osmo_gsm_tester/bts_osmotrx.py
index 9b1f077..fb13545 100644
--- a/src/osmo_gsm_tester/bts_osmotrx.py
+++ b/src/osmo_gsm_tester/bts_osmotrx.py
@@ -20,23 +20,13 @@
 import os
 import pprint
 import tempfile
-from . import log, config, util, template, process, event_loop, pcu_osmo
+from . import log, config, util, template, process, event_loop, pcu_osmo, bts_osmo
 
-class OsmoBtsTrx(log.Origin):
-    suite_run = None
-    bsc = None
-    sgsn = None
+class OsmoBtsTrx(bts_osmo.OsmoBtsMainUnit):
     run_dir = None
     inst = None
     env = None
     trx = None
-    pcu_sk_tmp_dir = None
-    lac = None
-    rac = None
-    cellid = None
-    bvci = None
-    proc_bts = None
-    _pcu = None
 
     BIN_BTS_TRX = 'osmo-bts-trx'
     BIN_PCU = 'osmo-pcu'
@@ -44,32 +34,8 @@
     CONF_BTS_TRX = 'osmo-bts-trx.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(log.C_RUN, OsmoBtsTrx.BIN_BTS_TRX)
-        self.suite_run = suite_run
-        self.conf = conf
+        super().__init__(suite_run, conf, OsmoBtsTrx.BIN_BTS_TRX)
         self.env = {}
-        self.pcu_sk_tmp_dir = tempfile.mkdtemp('', 'ogtpcusk')
-        if len(self.pcu_socket_path().encode()) > 107:
-            raise log.Error('Path for pcu socket is longer than max allowed len for unix socket path (107):', self.pcu_socket_path())
-
-    def cleanup(self):
-        if self.pcu_sk_tmp_dir:
-            try:
-                os.remove(self.pcu_socket_path())
-            except OSError:
-                pass
-            os.rmdir(self.pcu_sk_tmp_dir)
-
-    def pcu(self):
-        if self._pcu is None:
-            self._pcu = pcu_osmo.OsmoPcu(self.suite_run, self, self.conf)
-        return self._pcu
-
-    def pcu_socket_path(self):
-        return os.path.join(self.pcu_sk_tmp_dir, 'pcu_bts')
-
-    def remote_addr(self):
-        return self.conf.get('addr')
 
     def trx_remote_ip(self):
         conf_ip = self.conf.get('trx_remote_ip', None)
@@ -163,29 +129,6 @@
         self.dbg(conf=values)
         return values
 
-    def ready_for_pcu(self):
-        if not self.proc_bts or not self.proc_bts.is_running:
-            return False
-        return 'BTS is up' in (self.proc_bts.get_stderr() or '')
-
-    def set_bsc(self, bsc):
-        self.bsc = bsc
-
-    def set_sgsn(self, sgsn):
-        self.sgsn = sgsn
-
-    def set_lac(self, lac):
-        self.lac = lac
-
-    def set_rac(self, rac):
-        self.rac = rac
-
-    def set_cellid(self, cellid):
-        self.cellid = cellid
-
-    def set_bvci(self, bvci):
-        self.bvci = bvci
-
 class OsmoTrx(log.Origin):
     suite_run = None
     run_dir = None
diff --git a/src/osmo_gsm_tester/bts_sysmo.py b/src/osmo_gsm_tester/bts_sysmo.py
index 1d2dbf6..d286d02 100644
--- a/src/osmo_gsm_tester/bts_sysmo.py
+++ b/src/osmo_gsm_tester/bts_sysmo.py
@@ -19,33 +19,20 @@
 
 import os
 import pprint
-from . import log, config, util, template, process, pcu_sysmo
+from . import log, config, util, template, process, pcu_sysmo, bts_osmo
 
-class SysmoBts(log.Origin):
-    suite_run = None
-    bsc = None
-    sgsn = None
+class SysmoBts(bts_osmo.OsmoBts):
     run_dir = None
     inst = None
     remote_inst = None
-    remote_env = None
     remote_dir = None
-    lac = None
-    rac = None
-    cellid = None
-    bvci = None
-    proc_bts = None
-    _pcu = None
 
     REMOTE_DIR = '/osmo-gsm-tester-bts'
     BTS_SYSMO_BIN = 'osmo-bts-sysmo'
     BTS_SYSMO_CFG = 'osmo-bts-sysmo.cfg'
 
     def __init__(self, suite_run, conf):
-        super().__init__(log.C_RUN, self.BTS_SYSMO_BIN)
-        self.suite_run = suite_run
-        self.conf = conf
-        self.remote_env = {}
+        super().__init__(suite_run, conf, SysmoBts.BTS_SYSMO_BIN)
         self.remote_user = 'root'
 
     def start(self):
@@ -91,15 +78,9 @@
 
         self.proc_bts = self.launch_remote('osmo-bts-sysmo', args, remote_cwd=remote_run_dir)
 
-    def cleanup(self):
-        pass
-
     def _direct_pcu_enabled(self):
         return util.str2bool(self.conf.get('direct_pcu'))
 
-    def pcu_socket_path(self):
-        return os.path.join(SysmoBts.REMOTE_DIR, 'pcu_bts')
-
     def _process_remote(self, name, popen_args, remote_cwd=None):
         run_dir = self.run_dir.new_dir(name)
         return process.RemoteProcess(name, run_dir, self.remote_user, self.remote_addr(), remote_cwd,
@@ -128,13 +109,8 @@
             log.ctx(proc)
             raise log.Error('Exited in error')
 
-    def pcu(self):
-        if self._pcu is None:
-            self._pcu = pcu_sysmo.OsmoPcuSysmo(self.suite_run, self, self.conf)
-        return self._pcu
-
-    def remote_addr(self):
-        return self.conf.get('addr')
+    def create_pcu(self):
+        return pcu_sysmo.OsmoPcuSysmo(self.suite_run, self, self.conf)
 
     def pcu_socket_path(self):
         return os.path.join(SysmoBts.REMOTE_DIR, 'pcu_bts')
@@ -182,27 +158,4 @@
         self.dbg(conf=values)
         return values
 
-    def ready_for_pcu(self):
-        if not self.proc_bts or not self.proc_bts.is_running:
-            return False
-        return 'BTS is up' in (self.proc_bts.get_stderr() or '')
-
-    def set_bsc(self, bsc):
-        self.bsc = bsc
-
-    def set_sgsn(self, sgsn):
-        self.sgsn = sgsn
-
-    def set_lac(self, lac):
-        self.lac = lac
-
-    def set_rac(self, rac):
-        self.rac = rac
-
-    def set_cellid(self, cellid):
-        self.cellid = cellid
-
-    def set_bvci(self, bvci):
-        self.bvci = bvci
-
 # vim: expandtab tabstop=4 shiftwidth=4