diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2016-03-01 18:40:38 +0100 |
|---|---|---|
| committer | Andreas Eversberg <jolly@eversberg.eu> | 2016-03-13 09:12:11 +0100 |
| commit | 946c9ce10a92a29584d2e68e9c04fe63dcee7bdc (patch) | |
| tree | f400ab2212900957e358ef236f07307492ecf2d9 /docs/a-netz.html | |
initial git import
Diffstat (limited to 'docs/a-netz.html')
| -rw-r--r-- | docs/a-netz.html | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/docs/a-netz.html b/docs/a-netz.html new file mode 100644 index 0000000..360cd45 --- /dev/null +++ b/docs/a-netz.html @@ -0,0 +1,80 @@ +<html> +<head> +<title>osmocom-analog</title> +</head> +<body> +<center><table border='0' cellspacing='0' cellpadding='0' width='816'><tr><td><font face="ARIAL" size='5'> + +<h2><center>A-Netz</center></h2> + +<center><img src="a-netz.jpg"/></center> + +<p align='justify'> +Now run your base station on channel 30. +Tune the transmitter to 162.050 MHz and the receiver to 157.550. +You should tune the receiver to 164.050 first, to check if you hear the idle signal from the base station. +Then tune to actually uplink frequency 157.550 MHz. +</p> + +<font size='4'><pre> +# src/anetz/anetz -k 30 +... +anetz.c:170 info : Entering IDLE state, sending 2280 Hz tone. +Base station ready, please tune transmitter to 162.050 MHz and receiver to 157.550 MHz. +on-hook: ..... (enter 0..9 or d=dial) +</pre></font> + +<center><img src="a-netz-display.jpg"/></center> + +<p align='justify'> +Turn on you phone and wait for it to warm up (requires about half a minute). +Tune the phone to channel 30 and switch on your transmitter for the base station. +The phone should indicate a (green) light, to show idle channel. +If there is no green light, increase the level of your FM signal on the transmitter. +Or if you can't increase the audio level on the transmitter, do it with 'alsamixer'. +</p> + +<font size='4'><pre> +anetz.c:244 info : Received 1750 Hz calling signal from mobile station, sending 1750 Hz acknowledge signal. +anetz.c:256 info : 1750 Hz signal from mobile station is gone, stopping acknowledge signal. +call.c:574 info : Incomming call from '' to 'operator' +anetz.c:272 info : Received 1750 Hz release signal from mobile station, sending idle signal. +anetz.c:201 info : Entering IDLE state, sending 2280 Hz tone. +call.c:695 info : Call has been released with cause=16 +call disconnected: hangup (enter h=hangup) +</pre></font> + +<p align='justify'> +When you pick up the phone, the phone transmits a 1750 Hz calling tone. +On reception, the base station then transmits a 1750 Hz acknowledge ton. +After that the call is establised. +After establishment, you can use the headset, if present, for speech communication with the phone. +On hangup, the phone transmit a 1750 Hz hangup tone. +Then the base station returns to idle again. +Be sure that the phone turns off the transmitter and indicates the (green) light. +</p> + +<p align='justify'> +To call to the phone, be sure that your transmitter transmits loud enough to send 4 sine waves at once. +Enter the last 5 digits of the phone's number and press 'd' to dial. +If you listen to the transmit signal, you should hear 4 low pitched tones at once. +The phone should now stop the idle light and indicate an incomming call. +There is no acknowledgement from the phone until you pick up the call. +If the phone does not indicate an incomming call, increase the volume of the transmit signal, but be sure not to overdrive it. +Also be sure that you are actually dialing the right number, so the base station generates the correct paging tones. +</p> + +<p align='justify'> +Instead of transmitting all 4 tones at once, they can be transmitted after each other. +Each tone is playes for a short time. +After the last tone has been played, base station starts again with the first tone. +My phone also responds to a call, even if the tones cycle rather than sent simultaniously. +In this case the level of each tone is four times highter (+6 dB). +Add command line option "-P 50" to send each tone for 50 milliseconds. +Try something between 20-100 milliseconds, if the phone still doesn't ring. +</p> + +[<a href="index.html">Back to main page</a>] +</font></td></tr></table></center> +</body> +</html> |