From fca59bea770346cf1c1f9b0e00cb48a61b44a8f3 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sun, 25 Oct 2015 21:00:20 +0100 Subject: import of old now defunct presentation slides svn repo --- 2009/foss-mobile_world-seville2009/html/mgp00061.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 2009/foss-mobile_world-seville2009/html/mgp00061.txt (limited to '2009/foss-mobile_world-seville2009/html/mgp00061.txt') diff --git a/2009/foss-mobile_world-seville2009/html/mgp00061.txt b/2009/foss-mobile_world-seville2009/html/mgp00061.txt new file mode 100644 index 0000000..bf32515 --- /dev/null +++ b/2009/foss-mobile_world-seville2009/html/mgp00061.txt @@ -0,0 +1,15 @@ +FOSS in the Mobile World +The Siemens BS-11 microBTS + + +Siemens BS-11 microBTS +plain old 2G (GSM voice calls, CSD) +one or two TRX, 30mW to 2W each, GSM900 +two E1 interfaces (for daisy-chaining) +documentation under NDA, but +99.9% of the A-bis protocol available from GSM specs +See TS 04.08 (RLL), 12.21 (OML), 08.58 (RSL) +RS232 serial port for Local Maintenance Terminal +LMT software proprietary under NDA +not needed for operation of the BTS + -- cgit v1.2.3