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@ -286,7 +286,7 @@ Instead of transmitting all 4 tones at once, they can be transmitted after each
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Each tone is plays for a short time.
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After the last tone has been played, base station starts again with the first tone.
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My phone also responds to a call, even if the tones cycle rather than sent simultaneously.
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In this case the level of each tone is two times higher (+3 dB), but the peak level is two times lower (-3 dB) than the peak level of 4 simultaneous tones.
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In this case the deviation level of each tone is two times higher (+6 dB). (The level transmitted is two times lower (-6 dB) than the peak level of 4 simultaneous tones. This may help transmitters with deviation limiters to make the phone ring.)
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Add command line option "-P 50" to send each tone for 50 milliseconds.
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Try something between 20-100 milliseconds, if the phone still doesn't ring.
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Be sure to check: Does your transmitter has enough frequency deviation (15 KHz is suggested)? Do you really send the correct number of your phone, check the frequencies of your phone and use "-D 0" option to see what 4 frequencies the base station actually transmits.
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@ -24,7 +24,15 @@ AMPS (Advanced Mobile Phone Service) ; my radio setup<br>
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<br><br>
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<p>
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A base station implementation of classic mobile networks. All these networks use analog voice transmission. The signaling is done by tones and/or FSK modulated digital messages. It started with the idea to make a base station for the German B-Netz, but more networks followed.
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A base station implementation of classic mobile networks.
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All these networks use analog voice transmission.
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The signaling is done by tones and/or FSK modulated digital messages.
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It started with the idea to make a base station for the German B-Netz, but more networks followed.
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</p>
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<p>
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This project is pure software that requires a transmitter and a receiver connected to the sound card of a Linux PC.
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A second sound card or ISDN card is used to route calls from and to the mobile phone.
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</p>
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<h1>*this doc is under construction*</h1>
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@ -775,7 +775,7 @@ It uses the lower DMS layer to transfer data between network and mobile station
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If the phone supports SMS, try sending a test SMS to any number.
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Be sure to set the SMSC (Short Message Service Center) to '767'.
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This software will detect SMS call when the phone dials '767'.
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If you cannot define the SMSC on your phone, send an SMS and check what number was dialed, then use '-I <number>' to define SMSC at this software.
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If you cannot define the SMSC on your phone, send an SMS and check what number was dialed, then use '-S <number>' or '--smsc-number <number>' to define SMSC at this software.
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Also be sure not to enable encryption for SMS.
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The process looks like this:
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</p>
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@ -879,7 +879,7 @@ The process looks like this:
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<pre>
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nmt.c:1807 info : SMS for subscriber '3735859'
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SMS sending '1234' -> '3735859': 1234,3735859,This is a test!
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SMS sending '1234' -> '3735859': This is a test!
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nmt.c:1597 info : Call to mobile station, paging station id '3735859'
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nmt.c:434 info : Entering paging state (try 1), sending call to '3,735859'.
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nmt.c:443 info : Paging on our channel 1.
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@ -112,7 +112,7 @@ If you don't have the knowledge about power supplies, ask an expert to help you.
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<p>
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Early tests were done without any wiring between radios and sound adapter.
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This may worked for early tests with the B-Netz, but turned out to be a pain in the as.
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This may worked for early tests with the B-Netz, but turned out to be a pain in the ass.
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It is not possible to keep the levels and avoid feed-backs.
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</p>
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