anchor.diff:  The value part of the GPRS NSEI is encoded as 16bit integer value in
   network byte order.
   
  -The content of this attribute is not used by OsmoBTS, but
  +This attribute is not used by OsmoBTS, but
   simply passed to OsmoPCU connected to the PCU socket.
   
   
  
positive.code: | 9 | MCS 9
  |===
  
  The content of this attribute is not used by OsmoBTS, but
  simply passed to OsmoPCU connected to the PCU socket.
  
  === A-bis OML Initialization / BTS bring-up
  
negative.code: | byte at offset 1 | MCS8 | MCS7| MCS6 | MCS5 | MCS4| MCS3 | MCS2 | MCS1
  |===
          
  This attribute is not used by OsmoBTS, but
  simply passed to OsmoPCU connected to the PCU socket.
  
  
  