whats up with my multidrop?

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kobayashi_maru at onlinehome.de kobayashi_maru at onlinehome.de
Sat Mar 19 10:16:41 UTC 2011


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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.

T.

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