anchor.diff:  |===
   
   NOTE:: This message is *not* used by Osmocom style dynamic channels
  +
  +[[OSMO_ETWS_CMD]]
  +==== Osmocom ETWS Command
  +
  +This message is sent by the BSC to transfer the ETWS Primary Notification (PN)
  +from BSC to BTS and enable/disable transmission of ETWS PN by the BTS.  For more
  +information about ETWS, see 3GPP TS 23.041.
  +
  +If the ETWS PN length is > 0, the BTS will immediately start transmission
  +of the received ETWS PN on the PCH using P1 Rest Octets.  It will also forward
  +he ETWS PN to the PCU to enable the PCU to transmit it via PACCH on active TBF.
  +
  +If the ETWS PN length is 0, the BTS will stop any ETWS PN broadcast via the PCH.
  +
  +The Channel Number IE is set to the Downlink CCCH (PCH).
  +
  +[options="header"]
  +[cols="30%,25%,15%,15%,15%"]
  +|===
  +| INFORMATION ELEMENT | REFERENCE | PRESENCE | FORMAT | LENGTH
  +| Message discriminator | 08.58 9.1 | M | V | 1
  +| Message type | <<own_msg_types>> | M | V | 1
  +| Channel number | 08.58 9.3.1 | M | TV | 2
  +| SMSCB Message | 08.58 9.3.42 | M | TLV | 2-58
  +|===
  +
   
   === Information Element Codings
   
  
positive.code: | 0x77 | Delete Connection (DLCX) | <<rsl_dlcx_msg>>
  | 0x78 | Delete Connection (DLCX) ACK | <<rsl_dlcx_msg_ack>>
  | 0x79 | Delete Connection (DLCX) NACK | <<rsl_dlcx_msg_nack>>
  | 0x48 | PDCH Activate | <<rsl_pdch_act>>
  | 0x49 | PDCH Activate ACK | <<rsl_pdch_act_ack>>
  | 0x4a | PDCH Activate NACK | <<rsl_pdch_act_nack>>
  
negative.code: .3+.| <<pdch_deact>> | <<rsl_pdch_deact>> | RSL PDCH Deactivation | <- | Received
                     | <<rsl_pdch_deact_ack>> | RSL PDCH Deactivation ACK | -> | Sent
                     | <<rsl_pdch_deact_nack>> | RSL PDCH Deactivation NACK | -> | Sent
  5+<| *COMMON CHANNEL MANAGEMENT MESSAGES*
  .3+.| <<etws>> | <<OSMO_ETWS_CMD>> | Osmocom ETWS Command | <- | Received
  |===
  
  ==== Messages Not Implemented by OsmoBTS
  