Provided by: osmocom-analog_0.0~git20240908.8f91ed1-1_amd64 
NAME
jtacs - http://osmocom-analog.eversberg.eu/docs/
SYNOPSIS
jtacs -k <kanal/channel> -p -d -F yes | no [-S aid=<aid>] [options] [station_id]
Global options:
-h --help
This help
--config [~/]<path to config file>
Give a config file to use. If it starts with '~/', path is at home dir. Each line
in config file is one option, '-' or '--' must not be given! Default:
'~/.osmocom/analog/jtacs.conf'
--no-config
Even if a config file exists, don't use it.
-v --verbose <level> | <level>,<category>[,<category>[,...]] | list
Use 'list' to get a list of all levels and categories. Verbose level: digit of
debug level (default = '3') Verbose level+category: level digit followed by one or
more categories -> If no category is specified, all categories are selected
-v --verbose date
Show date with debug output
-k --kanal <channel>
-k --channel <channel>
Channel (German = Kanal) number of "Sender" (German = Transceiver)
-a --audio-device hw:<card>,<device>[/hw:<card>.<rec-device>]
Sound card and device number (default = 'hw:0,0') You may specify a different
recording device by using '/'. Don't set it for SDR!
-s --samplerate <rate>
Sample rate of sound device (default = '96000')
-i --interval 0.1..25
Interval of processing loop in ms (default = '1.0' ms) Use 10 to drastically reduce
CPU usage. In case of buffer underrun, increase buffer accordingly.
-b --buffer <ms>
How many milliseconds are processed in advance (default = '50') A buffer below 10
ms requires low interval like 0.1 ms.
-p --pre-emphasis
Enable pre-emphasis, if you directly connect to the oscillator of the transmitter.
(No pre-emphasis done by the transmitter.)
-d --de-emphasis
Enable de-emphasis, if you directly connect to the discriminator of the receiver.
(No de-emphasis done by the receiver.)
--rx-gain <dB>
Raise/lower receiver's RX level by given gain in dB. (Works with sound card only.)
--tx-gain <dB>
Raise/lower transmitters's RX level by given gain in dB. (Works with sound card
only.)
-e --echo-test
Use echo test, to send back audio from mobile phone's microphone to the speaker.
(German: 'Blasprobe').
-c --call-device hw:<card>,<device>[/hw:<card>.<rec-device>]
Sound card and device number for headset (default = '') You may specify a different
recording device by using '/'.
--call-samplerate <rate>
Sample rate of sound device for headset (default = '48000')
--call-buffer <ms>
How many milliseconds are processed in advance (default = '50')
-x --osmocc-cross
Enable built-in call forwarding between mobiles. Be sure to have at least one
control channel and two voice channels. Alternatively use one combined
control+voice channel and one voice channels.
-o --osmocc-sock
Disable built-in call control and offer socket
--cc "<osmo-cc arg>" [--cc ...]
Pass arguments to Osmo-CC endpoint. Use '-cc help' for description.
--no-l16
Disable L16 (linear 16 bit) codec.
-t --tones 0 | 1
Connect call on setup/release to provide classic tones towards fixed network
(default = '1')
-l --loopback <type>
Loopback test: 1 = internal | 2 = external | 3 = echo
-r --realtime <prio>
Set prio: 0 to disable, 99 for maximum (default = 0)
--fast-math
Use fast math approximation for slow CPU / ARM based systems.
--write-rx-wave <file>
Write received audio to given wave file.
--write-tx-wave <file>
Write transmitted audio to given wave file.
--read-rx-wave <file>
Replace received audio by given wave file.
--read-tx-wave <file>
Replace transmitted audio by given wave file.
--limesdr
Auto-select several required options for LimeSDR
--limesdr-mini
Auto-select several required options for LimeSDR Mini
SDR options:
--sdr-soapy
Force SoapySDR driver
--sdr-channel <channel #>
Give channel number for multi channel SDR device (default = 0)
--sdr-device-args <args>
--sdr-stream-args <args>
--sdr-tune-args <args>
Optional SDR device arguments, separated by comma e.g. --sdr-device-args
<key>=<value>[,<key>=<value>[,...]]
--sdr-samplerate <samplerate>
Sample rate to use with SDR. By default it equals the regular sample rate.
--sdr-lo-offset <Hz>
Give frequency offset in Hz to move the local oscillator away from the target
frequency. (default = -1000000)
--sdr-bandwidth <bandwidth>
Give IF filter bandwidth to use. If not, sample rate is used.
--sdr-rx-antenna <name>
SDR device's RX antenna name, use 'list' to get a list
--sdr-tx-antenna <name>
SDR device's TX antenna name, use 'list' to get a list
--sdr-clock-source <name>
SDR device's clock sourc name, use 'list' to get a list
--sdr-rx-gain <gain>
SDR device's RX gain in dB (default = 0.0)
--sdr-tx-gain <gain>
SDR device's TX gain in dB (default = 0.0)
--write-iq-rx-wave <file>
Write received IQ data to given wave file.
--write-iq-tx-wave <file>
Write transmitted IQ data to given wave file.
--read-iq-rx-wave <file>
Replace received IQ data by given wave file.
--read-iq-tx-wave <file>
Replace transmitted IQ data by given wave file.
--sdr-swap-links
Swap RX and TX frequencies for loopback tests over the air.
--sdr-timestamps 1 | 0
Use TX timestamps on UHD device. (default = 1)
Network specific options:
-T --channel-type <channel type> | list
Give channel type, use 'list' to get a list. (default = 'CC/PC/VC')
-F --flip-polarity no | yes
Flip polarity of transmitted FSK signal. If yes, the sound card generates a
negative signal rather than a positive one. Be sure that a positive signal causes a
positive deviation on your transmitter. If the phone shows 'NoSrv', try the other
way.
-P --ms-power <power level>
Give power level of the mobile station 0..7. (default = '4') 0 = 2.28 W; 1 = 1.12
W; 2 = 447 mW; 3 = 178 mW; 4 = 70.8 mW; 5 = 28.2 mW; 6 = 11.2 mW; 7 = 4.5 mW
-D --dtx <parameter>
Give DTX parameter for Discontinuous Transmission. (default = '0') 0 = disable DTX;
1 = reserved; 2 = 8 dB attenuation in low state; 3 = transmitter off
-I --caller-id 1 | 0
If set, the caller ID is sent while ringing the phone. (default = '0') Note that
this does not work as documented in the specs. If the phone does not support caller
ID, it will abort connection on receiving caller ID for some unknown reason.
Therefore use caller ID only with phones that support it.
-S --sysinfo aid=<System ID> | aid=list
Give area ID of cell broadcast (default = '1') If it changes, phone re-registers.
Use 'aid=list' to get a full list.
-S --sysinfo dcc=<digital color code>
Give digital color code 0..3 (default = '0')
-S --sysinfo scc=<SAT color code>
Give supervisor tone color code 0..2 (default = '0')
-S --sysinfo regincr
Amount to add to REGID after successful registration (default = '300') Since REGID
is incremented every second, this value define after how many second the phone
waits before it re-registers.
-S --sysinfo pureg=0 | pureg=1
If 1, phone registers on every power on (default = '0') Warning: Older phones may
not like this and show 'No Service'! Note: This feature was added 1995 to the
standard, it might not work.
-S --sysinfo pdreg=0 | pdreg=1
If 1, phone de-registers on every power down (default = '0') Warning: Older phones
may not like this and show 'No Service'! Note: This feature was added 1995 to the
standard, it might not work.
-S --sysinfo locaid=<location area ID > | locaid=-1 to disable
(default = '-1') If it changes, phone re-registers. Warning: Older phones may not
like this and show 'No Service'! Note: This feature was added 1995 to the
standard, it might not work.
-S --sysinfo regh=0 | regh=1
If 1, phone registers only if System ID matches (default = '1')
-S --sysinfo regr=0 | regr=1
If 1, phone registers only if System ID is different (default = '1')
-S --sysinfo bis=0 | bis=1
If 0, phone ignores BUSY/IDLE bit on FOCC (default = '0') If 1, be sure to have a
round-trip delay (latency) not more than 5 ms
-O --tolerant
Be more tolerant when hunting for sync sequence
station_id: Give 10 digits of station ID,
so you don't need to enter it for every start of this application. Give 10 digits
for JTACS number (440-XXXXXXX).
Press digits '0'..'9' and then 'd' key to dial towards mobile station. Press 'h' key to
hangup. Press 'w' key to toggle display of RX wave form. Press 'c' key to toggle display
of channel status. Press 'm' key to toggle display of measurement value. Press 'q' key
to toggle display of RX I/Q vector. Press 's' key to toggle display of RX spectrum.
Press 'b' key to remove DC level.
jtacs(1)