Hi all,
I've connected my 6113 to a DAHDI card in raw mode and sampled the data, it can be found (together with some tools) in osmo-rbs.git on git.osmocom.org
To me, it seems as if it simply sending a continuous sequence of SABM commands for TEI=62/SAPI=62 on timeslot 1, interspaced with idle pattern of FLAG bytes.
However, if I attempt to send this sequence (using dslot=1, i.e. the HDLC support within DAHDI) and the rbs_sabm.c program on /dev/dahdi/1), there is no response from the RBS.
On all other timeslots, the 6113 will just produce a default pattern of alternating 0 and 1 bits (0xAAAAAAA).
We still must be doing something wrong here...