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Feature #1822
closedsupport for initial SABM link establishment on Ericsson Abis
Status:
Closed
Priority:
High
Assignee:
Category:
libbsc
Start date:
10/15/2016
Due date:
% Done:
100%
Resolution:
Spec Reference:
Description
Contrary to normal A-bis, Ericsson RBS2000 have the following properties:
- BTS is NT and BSC is TE role, i.e. the BSC should establish LAPD ABM towards the BTS (using SABM..UA.. handshake)
- BTS must re-transmit SABM frames at a specific rate (not too fast, not too slow) for the BTS to recognize this as signalling timeslot. Experiments have shown 300ms seems to work fine.
Achieving this is probably possible by modifying N200 and T200 in case LAPD is used for RBS2000?
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