hello list
please the the entire mail thoroughly before answering.
it's a neverending story with the bs-11 f***ing multidrop: i have bts0 that works perfect as single, and so does bts1, but only bts0 is bootstrapped
lets start from the beginning: misdn is configured port 0 has ts1 as d-channel and 2-15 as b-channels, port 1 has ts17 as d-channel and 18-31
as b-channels.
that says bs11_config for bts0, that is connected to pc:
SITE MANAGER ATTRIBUTES:
    E1 Channel: Port=0 Timeslot=1 (Full Slot)
    TEI: 25

BS11 Line Interface ATTRIBUTES:
    PLL Mode: Standalone

BS11 CCLK ATTRIBUTES:
    CCLK Accuracy: High (1)
    CCLK Type=0

BS11 Power Amplifier 0 ATTRIBUTES:
    TRX Power: 30mW (GSM)

BPORT0 ATTRIBUTES:
    Line Configuration: Multi-Drop (1)

BPORT1 ATTRIBUTES:
    Line Configuration: Multi-Drop (1)

and that is bts1:
SITE MANAGER ATTRIBUTES:
    E1 Channel: Port=1 Timeslot=17 (Full Slot)
    TEI: 26

BS11 Line Interface ATTRIBUTES:
    PLL Mode: Standalone

BS11 CCLK ATTRIBUTES:
    CCLK Accuracy: High (1)
    CCLK Type=0

BS11 Power Amplifier 0 ATTRIBUTES:
    TRX Power: 30mW (GSM)

BPORT0 ATTRIBUTES:
    Line Configuration: Star (0)

BPORT1 GET ATTR NACK
LMT LOGOFF: ACK

as you can see, the d-channels match with the bts-setting. each bs-11 have a working trx0 and a high clock accuracy.
here we go with cfg:
!
! OpenBSC configuration saved from vty
!   !
password foo
!
line vty
no login
!
network
network country code 262
mobile network code 10
short name Y-Phone
long name Yodaphone
handover 1
bts 0
type bs11
band GSM900
cell_identity 1
location_area_code 1
training_sequence_code 7
base_station_id_code 63
oml e1 line 0 timeslot 1 sub-slot full
oml e1 tei 25
trx 0
   arfcn 121
   max_power_red 0
   rsl e1 line 0 timeslot 1 sub-slot full
   rsl e1 tei 1
    timeslot 0
     phys_chan_config CCCH+SDCCH4
     e1 line 0 timeslot 1 sub-slot full
    timeslot 1
     phys_chan_config TCH/F
     e1 line 0 timeslot 2 sub-slot 1
    timeslot 2
     phys_chan_config TCH/F
     e1 line 0 timeslot 2 sub-slot 2
    timeslot 3
     phys_chan_config TCH/F
     e1 line 0 timeslot 2 sub-slot 3
    timeslot 4
     phys_chan_config TCH/F
     e1 line 0 timeslot 3 sub-slot 0
    timeslot 5
     phys_chan_config TCH/F
     e1 line 0 timeslot 3 sub-slot 1
    timeslot 6
     phys_chan_config TCH/F
     e1 line 0 timeslot 3 sub-slot 2
    timeslot 7
     phys_chan_config TCH/F
     e1 line 0 timeslot 3 sub-slot 3
bts 1
type bs11
band GSM900
location_area_code 2
training_sequence_code 7
base_station_id_code 63
oml e1 line 1 timeslot 17 sub-slot full
oml e1 tei 26
trx 0
   arfcn 1
   max_power_red 0
   rsl e1 line 1 timeslot 17 sub-slot full
   rsl e1 tei 2
    timeslot 0
     phys_chan_config CCCH+SDCCH4
     e1 line 1 timeslot 17 sub-slot full
    timeslot 1
     phys_chan_config SDCCH8
     e1 line 1 timeslot 18 sub-slot 1
    timeslot 2
     phys_chan_config TCH/F
     e1 line 1 timeslot 18 sub-slot 2
    timeslot 3
     phys_chan_config TCH/F
     e1 line 1 timeslot 18 sub-slot 3
    timeslot 4
     phys_chan_config TCH/F
     e1 line 1 timeslot 19 sub-slot 0
    timeslot 5
     phys_chan_config TCH/F
     e1 line 1 timeslot 19 sub-slot 1
    timeslot 6
     phys_chan_config TCH/F
     e1 line 1 timeslot 19 sub-slot 2
    timeslot 7
     phys_chan_config TCH/F
     e1 line 1 timeslot 19 sub-slot 3

both bs-11 works as single with the corresponding section (bts 0 or 1) of the cfg file. i have differents teis for all lapd connection.
i use cat4 cable for the bs-11 connection (10 m between the bs-11s)

maybe the screenshot attached unveils the problem.

any help/hint is very welcome.