PageOutline = Ericsson RBS 2000 =

There is some initial/experimental code in OpenBSC to support the Ericsson RBS 2000 family of BTS.

As opposed to Siemens/ip.access, Ericsson A-bis is much farther away from the specs, particularly
since their Organization and Maintenance Layer (OML) is a proprietary protocol called OM2000.

Nonetheless, we have been making quite a bit of progress in getting the RBS 2000 series supported.
Right now it is still not complete. Don't expect anything to work at this stage.

• Ericsson RBS 2000 series BTS
• E1 or T1 interface card, supported by the [wiki:DAHDI] driver. WE DO NOT SUPPORT RBS with mISDN drivers!
• RBS with software + IDB in default configuration, especially OML TEI set to 62
• /etc/dahdi/system.conf with "dslot=1,4" in it

• Check that dahdi_tool is showing the link as OK, otherwise you have some wiring/polarity issues
• Create an openbsc.cfg that lists your BTS as 'rbs2000' type (see attached example) * do not try to be clever and use non-standard E1 timeslot assignments, the code is hard-coded and assumes certain values
• start [wiki:bsc_hack] as usual

So far, you should get * A-bis link initialization, i.e. BSC telling the BTS to use TS1 as signalling for IXU/DXU OML * OpenBSC configuring and starting the CF (central function) * You can manually connect, configure and enable the IS via the VTY * With some luck, the OML SAPI to the RRU/TRU's can then be established * Using the '-p foo.pcap' option, you can write a PCAP protocol trace to be used with wireshark and our OM2000 wireshark dissector

What is NOT supported yet: * Actually initializing the transceivers and Um timeslots * Any actual communication with phones