RSL / SI: Make sure to have correct LAPDm header in SI5/SI6 on SACCH
RSL / SI: Make sure to have correct LAPDm header in SI5/SI6 on SACCH

SI5/SI6 and other messages on SACCH need the C/R and the EA bit set in
the LAPDm header.  Most devices accept a broken header, but especially
the Wavecom Q2686 responds with tons of RR STATUS messages if there is
any invalid bit.

geosphere/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts,telenoobie/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts