Commit Graph

14 Commits

Author SHA1 Message Date
Andreas Eversberg b1c452cf12 Changed command line options
* All lower case options define common options
* All upper case options define network specific options
2016-11-27 22:06:47 +01:00
Andreas Eversberg 17930af920 C-Netz: callref is moved completely to transaction object 2016-10-02 09:06:04 +02:00
Andreas Eversberg 8d7c7f4425 callref: Move callref from 'sender' to individual implementation of a, b, c-netz
Cellular networks use transaction instances, so callref is now member of
transaction object.
2016-10-02 09:06:03 +02:00
Andreas Eversberg e4079b8ce8 C-Netz: Fix release cause coding 2016-08-03 12:03:54 +02:00
Andreas Eversberg 664f8c7ac0 C-Netz: retry call setup messages up to 3 times 2016-08-01 12:15:12 +02:00
Andreas Eversberg 6a5af9aeac Typos: acknowledgement -> acknowledgment signalling -> signaling 2016-07-24 12:31:08 +02:00
Andreas Eversberg 2ee51022f4 Rename 'compander' to 'compandor' 2016-06-20 19:37:56 +02:00
Andreas Eversberg 051cc81b13 C-Netz: Move transaction routines to seperate file 2016-06-12 16:11:20 +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 e2a9c2c6a5 Automatic FSK polarity selection on TX side
This is done by simulating two cells with different polarities.
On first message from mobile station, the cell with the correct
polarity is used, the other is disabled.

On RX side the polarity is not selected, since FSK decoder detects
polarity for every frame.
2016-05-13 09:37:01 +02:00
Andreas Eversberg 57ba648ac4 C-Netz: Add tiny database to track if phones are online
Reject calls, if not online.

Use an interval to check if the phones are still online.
2016-05-08 15:53:00 +02:00
Andreas Eversberg bae12156a2 common code: Add input gain option 2016-05-08 15:49:45 +02:00
Andreas Eversberg 7434e21dc2 Multi transceiver support
This can be multiple transceivers on multiple sound cards.

Two transceivers can be bundled on one sound device as well, using both channels.
2016-05-08 15:48:13 +02:00
Andreas Eversberg 16acdbf59d Implementation of C-Netz (German mobile telephone system) 2016-04-24 15:19:00 +02:00