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Author SHA1 Message Date
Andreas Eversberg
ce86f62b11 work on docs 2016-07-24 12:31:06 +02:00
Andreas Eversberg
b3b42e8bc4 Cleanup warnings at autoconfig files 2016-07-24 12:31:06 +02:00
Andreas Eversberg
a6bd841247 NMT: Various fixes for SMS support 2016-07-24 12:31:05 +02:00
Andreas Eversberg
3ef9ef88bd B-Netz: Compiler switch to generate a dial sequence (for testing) 2016-07-24 12:30:56 +02:00
Andreas Eversberg
2137db0e01 NMT: Autoanswer for SMS/DMS calls 2016-07-09 15:16:17 +02:00
Andreas Eversberg
e7fa08b6df NMT / SMS: Short Message Service support 2016-07-09 15:16:16 +02:00
Andreas Eversberg
64c829909b NMT / DMS: User data facility support (required for SMS) 2016-07-09 11:27:24 +02:00
Andreas Eversberg
62b3712ce5 common code: Check and ignore events without callref set 2016-07-09 11:27:02 +02:00
Andreas Eversberg
f39ee2f15a common code: Add support for main loop handler 2016-07-09 11:27:02 +02:00
Andreas Eversberg
26ab26db48 minor fix at MNCC socket 2016-07-09 11:27:02 +02:00
Andreas Eversberg
44ebf1616a work on docs 2016-07-07 16:25:55 +02:00
Andreas Eversberg
ab9aba1a84 B-Netz: Reply the station ID correctly 
It must be replied right after it has been received the first time.
It does not matter if this happens a bit later, even a second later.

Thanx to Hans Wigger for providing recording from his B-Netz tester to
figure this out.
 2016-07-06 16:19:01 +02:00
Andreas Eversberg
54266a9937 Minor fixup to .gitignore: ignore test_compandor 2016-07-06 16:18:51 +02:00
Andreas Eversberg
f3fd01ebcd ALSA code: Fixed corrupted sample at the end of a read 
The last sample may get corrupted. It seems that this depends on the
card that is used. To fix this, the snd_pcm_avail is checked and
one sample less than available is read using snd_pcm_readi. This
sample remains in RX buffer until next read. Then it is not corrupted.
 2016-07-02 08:04:43 +02:00
Andreas Eversberg
4719be95bd work on docs 2016-07-02 08:01:34 +02:00
Andreas Eversberg
2ee51022f4 Rename 'compander' to 'compandor' 2016-06-20 19:37:56 +02:00
Andreas Eversberg
86daa5a64a AMPS: Add option to use the BUSY/IDLE bit on FOCC 2016-06-20 17:16:46 +02:00
Andreas Eversberg
76f6285846 AMPS: Show round trip delay of Filler frames in loopback mode 2016-06-20 17:15:42 +02:00
Andreas Eversberg
d851c37eac common code: Release MNCC call 30 seconds after listening to announcement 2016-06-19 17:46:56 +02:00
Andreas Eversberg
b45b0c6bac common code: Minor fix in main loop 2016-06-19 17:43:48 +02:00
Andreas Eversberg
f87e36fa47 AMPS: Detect difference between paging response and call response 
Release call, if paging response was received, after call from fixed
network has already been released.
 2016-06-19 17:41:42 +02:00
Andreas Eversberg
2b61a2ca4a Work on docs 2016-06-19 11:09:03 +02:00
Andreas Eversberg
673aa74e6c AMPS: Various minor fixes 2016-06-19 11:03:59 +02:00
Andreas Eversberg
4d52f955b3 common code: Add processing interval option to decrese CPU usage 2016-06-18 19:33:08 +02:00
Andreas Eversberg
e10898c1e8 C-Netz: Minor cosmetic fixes 2016-06-18 08:05:18 +02:00
Andreas Eversberg
d2c4ca4fa9 Implementation of Advanced Mobile Phone Service (AMPS) 2016-06-17 17:03:29 +02:00
Andreas Eversberg
7d5d3da8d3 Add function to display wave form from input/loop 
Use 'w' to toggle display.

Move terminal input processing and main loop to main_common.c
 2016-06-17 17:03:28 +02:00
Andreas Eversberg
4e0e13cb2d work on docs 2016-06-17 17:03:27 +02:00
Andreas Eversberg
1d20119d85 common code: Call control allows to re-dial after disconnect 
No hangup key required before that anymore.
 2016-06-12 16:16:37 +02:00
Andreas Eversberg
7cfd11eb17 common code: Add feature to select debug category rather than showing all 2016-06-12 16:14:29 +02:00
Andreas Eversberg
051cc81b13 C-Netz: Move transaction routines to seperate file 2016-06-12 16:11:20 +02:00
Andreas Eversberg
26593ed034 NMT: fix minor bug 2016-06-12 16:11:20 +02:00
Andreas Eversberg
4d22b11855 common code: Add debug #define for capture generated singal 
Used for fundamental debugging of encoded signal
 2016-06-12 16:11:20 +02:00
Andreas Eversberg
c933250685 Add dsp mode change fuction to A and B Netz, fixed NMT 2016-06-12 16:11:20 +02:00
Andreas Eversberg
997f8eda43 B-Netz: Add timer for switching back from calling channel 
The timer ensures that the paging sequence is sent out by sound card before
switching back to traffic channel
 2016-05-29 17:17:49 +02:00
Andreas Eversberg
1ceb3026dd Fixed link problem with alsa lib 
Thanx to Martin for pointing to this problem.
 2016-05-16 18:41:21 +02:00
Andreas Eversberg
90dbc0cbd7 C-Netz: Debug fixes 2016-05-15 20:44:07 +02:00
Andreas Eversberg
50136d7e8a NMT: Typo in channel list 2016-05-15 20:43:58 +02:00
Andreas Eversberg
e9640c0cd8 C-Netz: Fix TX polarity selection 2016-05-15 20:43:49 +02:00
Andreas Eversberg
9ecb87f3e6 Fixing station ID command line parameter 2016-05-15 20:43:38 +02:00
Andreas Eversberg
7aa2445b47 Move amplitude (level) debugging to debug.c 2016-05-15 20:37:06 +02:00
Andreas Eversberg
adc3270dc0 Acknowledgements 2016-05-13 20:44:47 +02:00
Andreas Eversberg
60d9a7b496 C-Netz: Advice about requirement of emphasis done by software 2016-05-13 19:23:43 +02:00
Andreas Eversberg
c2cfce2373 wip: docs 2016-05-13 09:37:03 +02:00
Andreas Eversberg
46fa72894e C-Netz: Calibration/fix processing of tone levels on TX and RX side 
FSK and compander levels are adjusted.

Eliminate offsets between subsequent speech chunks. This is done by
high-pass filter. An offset is not passed to the filter.

Do correct audio processing chain:
 time compress -> compressor -> scrambler / pre-emphasis -> TX
 RX -> de-scrambler / de-emphasis -> expander -> time expand
 2016-05-13 09:37:03 +02:00
Andreas Eversberg
5a9c9c7401 C-Netz: Send 5280 Hz test tone on idle speech channel 2016-05-13 09:37:03 +02:00
Andreas Eversberg
bbab972b51 NMT: Fixup paging on other channel 2016-05-13 09:37:03 +02:00
Andreas Eversberg
69ccdb99b5 NMT: Calibration of tone levels on TX and RX side 2016-05-13 09:37:03 +02:00
Andreas Eversberg
27e8b03df5 Fixup typo on jitter code 2016-05-13 09:37:02 +02:00
Andreas Eversberg
42eefe90bf common code: Fixed de-emphasis by adding high pass filter 
This high-pass filter filters out DC and frequencies below 300 Hz.
Now de-emphases will not cause low frequencies to saturate audio level
range or cause too high levels on low frequencies.
 2016-05-13 09:37:02 +02:00