diff --git a/lib/trx_interface/trx_impl.cc b/lib/trx_interface/trx_impl.cc
index 8847278..2068da3 100644
--- a/lib/trx_interface/trx_impl.cc
+++ b/lib/trx_interface/trx_impl.cc
@@ -87,6 +87,9 @@
         // Bind DATA interface handler
         d_data_sock->udp_rx_handler = boost::bind(
           &trx_impl::handle_ul_burst, this, _1, _2);
+
+        // Init timeslot filter
+        d_ts_filter_tn = -1;
     }
 
     /*
@@ -100,6 +103,21 @@
     }
 
     /*
+     * Timeslot filter API (getter and setter)
+     */
+    void
+    trx_impl::ts_filter_set_tn(int tn)
+    {
+      d_ts_filter_tn = (tn >= 0 && tn <= 7) ? tn : -1;
+    }
+
+    int
+    trx_impl::ts_filter_get_tn(void)
+    {
+      return d_ts_filter_tn;
+    }
+
+    /*
      * Check if burst is a RACH burst
      */
     bool trx_impl::detect_rach(uint8_t *burst)
@@ -192,6 +210,10 @@
       // Compose a new UDP payload with burst
       burst_pack(msg, buf);
 
+      // Timeslot filter
+      if (d_ts_filter_tn != -1 && buf[0] != d_ts_filter_tn)
+        return;
+
       // Send a burst
       d_data_sock->udp_send(buf, 158);
     }