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authorDieter Spaar <spaar@mirider.augusta.de>2010-07-29 21:35:13 +0200
committerHarald Welte <laforge@gnumonks.org>2010-07-29 21:35:13 +0200
commitf86cfbef19c6faaea4e7c90f412d55a189fdbd48 (patch)
tree72180fa82a8845edc6c709cf39267c4671167d38 /gsm-receiver
parent9baae39b8d98a3271f03a1848c62180f129a775f (diff)
Update README file with some more notes
Diffstat (limited to 'gsm-receiver')
-rw-r--r--gsm-receiver/README20
1 files changed, 20 insertions, 0 deletions
diff --git a/gsm-receiver/README b/gsm-receiver/README
index 96b560b..190c6cb 100644
--- a/gsm-receiver/README
+++ b/gsm-receiver/README
@@ -3,3 +3,23 @@ Usage:
$ capture.sh <frequency>
-run go.sh on this file:
$ go.sh <file.cfile>
+
+
+* Configuration parameter for decoding a certain timeslot:
+ Single digit (Timelslot) followed by the configuration, for example:
+ 0C : TS0 "Combined configuration", with SDCCH/4 (FCCH + SCH + BCCH + CCCH
+ + SDCCH/4)
+ 0B : TS0 "FCCH + SCH + BCCH + CCCH"
+ 1S : TS1 SDCCH/8
+ 2T : TS2 Traffic
+
+* Specifying a key will decrypt all traffic burst (SDCCH, SACCH, TCH)
+ using A5/1 before decoding
+
+* Use Wireshark and GSMTAP instead of "gsmdecode"
+
+* Limitations:
+ - only TCH_F traffic
+ - no decoder besides "toast" for Full Rate Speech
+ - single ARFCN only
+ - no frequency hopping
personal git repositories of Harald Welte. Your mileage may vary