anchor.diff:  | 0x38 | 9.4.58 | VSWR Thresholds  |  | _ignored_
   | 0x39 | 9.4.59 | Window Size  |  | _ignored_
   | 0x40 | 9.4.60 | TSC  | <- | Received, with limitations: see <<NM_ATT_TSC>>
  -| 0x41 | 9.4.61 | SW Configuration  |  | _ignored_
  +| 0x41 | 9.4.61 | SW Configuration  | -> | Sent, see <<NM_ATT_SW_CONFIG>>
   | 0x43 | 9.4.63 | Perceived Severity  |  | _ignored_
  -| 0x44 | 9.4.64 | Get Attribute Response Info  |  | _ignored_
  +| 0x44 | 9.4.64 | Get Attribute Response Info  | -> | Sent, see <<NM_ATT_MANUF_ID>>
   | 0x45 | 9.4.65 | Outstanding Alarm Sequence  |  | _ignored_
   | 0x46 | 9.4.66 | HW Conf Change Info  |  | _ignored_
   | 0x47 | 9.4.32 | Measurement Result  |  | _ignored_
  
positive.code: 
  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:     | 8.10.3 | 0x8C | Stop Measurement
      | 8.10.4 | 0x8D | Start Measurement
  3+<| *Other Messages:*
  .3+.| 8.11.2 | 0x84 | Set Alarm Threshold
               | 0x85 | Set Alarm Threshold Ack
               | 0x86 | Set Alarm Threshold Nack
  