From 946c9ce10a92a29584d2e68e9c04fe63dcee7bdc Mon Sep 17 00:00:00 2001 From: Andreas Eversberg Date: Tue, 1 Mar 2016 18:40:38 +0100 Subject: initial git import --- docs/a-netz.html | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 docs/a-netz.html (limited to 'docs/a-netz.html') 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 @@ + + +osmocom-analog + + +
+ +

A-Netz

+ +
+ +

+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. +

+ +
+# 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)
+
 + +
+ +

+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'. +

+ +
+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)
+
 + +

+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. +

+ +

+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. +

+ +

+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. +

+ +[Back to main page] +
+ + -- cgit v1.2.3