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Harald Welte laforge at gnumonks.orgOn Tue, Mar 10, 2009 at 03:24:00PM +0100, Klaus-Peter Junghanns wrote: > i am staring at the sources right now, figuring out how openbsc uses > which part of misdn to send/receive frames over the e1 link. I think > it's doing something like this (please correct me if i am wrong: i hope it's not too hard to figure it out, the e1_input abstraction makes it a bit more difficult than it used to be. > - use timeslot 1 in hdlc mode for the signalling link yes. And use a number (minimum: two) DLC's with each their own pair of SAPI/TEI. > - use misdns layer 2 to handle the TEI assignment, etc yes. > What i am wondering about is: > - which ETSI standard describs layer 2 for GSM abis? it's gsm 08.56 (ETSI TS 100 595). you also might want to look at 08.51 / 08.52 and 08.54. -- - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6) -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 189 bytes Desc: Digital signature URL: <http://lists.osmocom.org/pipermail/openbsc/attachments/20090310/57012ac5/attachment.bin>