osmocom-analog/docs/amps.html

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<title>osmocom-analog</title>
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<body>
<center><table><tr><td>
<h2><center>AMPS</center></h2>
<center><img src="amps.jpg"/></center>
<ul>
<li><a href="#history">History</a>
<li><a href="#howitworks">How it works</a>
<li><a href="#basestation">Setup of a base station</a>
</ul>
<p class="toppic">
<a name="history"></a>
History
</p>
<p>
*TBD*
</p>
<center><img src="amps-dynatac.jpg"/></center>
<p>
<ul>
<li>Frequency range:
<li>xxx voice channels
<li>Duplex distance: 45 MHz
<li>Channel spacing: 30 KHz
<li>Voice modulation: FM
<li>Signalling modulation: carrier FSK
<li>Frequency deviation: 8 KHz (FSK)
<li>Mobile station transmit power:
<li>Base station transmit power:
</ul>
</p>
<p class="toppic">
<a name="howitworks"></a>
</p>
<p>
*TBD*
</p>
<p class="toppic">
<a name="basestation"></a>
Setup of a base station
</p>
<p>
*TBD*
</p>
<pre>
# amps -k 334 -F yes -E -e
...
Selected System ID (SID) 40 belongs to:
Salinas, CA (GTE Mobile)
San Francisco, CA (GTE Mobile)
San Jose, CA (GTE Mobile)
San Rosa, CA (GTE Mobile)
Santa Barbara, CA (GTE Mobile)
amps.c:390 notice : You selected 'combined control &amp; paging &amp; voice channel'.
This is a hack, but the only way to use control channel and voice channel on one transceiver.
Some phones may reject this.
amps.c:481 info : Entering IDLE state, sending Overhead/Filler frames on combined control &amp; paging
&amp; voice channel.
Base station on channel 334 ready, please tune transmitter to 880.020 MHz and receiver to 835.020 MHz.
frame.c:3658 info : RX Level: 54% Quality: 66% Polarity: NEGATIVE
frame.c:3658 info : RX Level: 53% Quality: 65% Polarity: NEGATIVE
frame.c:3658 info : RX Level: 52% Quality: 60% Polarity: NEGATIVE
</pre>
<pre>
frame.c:3630 info : RX RECC: DCC=0
frame.c:2990 info : Received: Word A - Abbreviated Address Word
frame.c:2990 info : Received: Word B - Extended Address Word
frame.c:2990 info : Received: Word C - Serial Number Word
amps.c:635 info : Registration 617XXXXXXX (ESN = 825b5f79, Class 6 / Discontinuous / 25 MHz)
transaction.c:175 info : Transaction state IDLE -&gt; REGISTER ACK
transaction.c:98 info : Created transaction '617XXXXXXX' for subscriber 'REGISTER ACK'
amps.c:989 info : Sending Register acknowledge
transaction.c:175 info : Transaction state REGISTER ACK -&gt; REGISTER ACK SEND
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
transaction.c:117 info : Destroying transaction for subscriber '617XXXXXXX'
transaction.c:175 info : Transaction state REGISTER ACK SEND -&gt; IDLE
</pre>
<pre>
frame.c:3630 info : RX RECC: DCC=0
frame.c:2990 info : Received: Word A - Abbreviated Address Word
frame.c:2990 info : Received: Word B - Extended Address Word
frame.c:2990 info : Received: Word C - Serial Number Word
frame.c:2990 info : Received: Word D - First Word of the Called-Address (Origination - Voice Service)
amps.c:653 info : Call 617XXXXXXX -&gt; 5551212 (ESN = 825b5f79, Class 6 / Discontinuous / 25 MHz)
transaction.c:175 info : Transaction state IDLE -&gt; CALL ASSIGN MOBILE ORIGINAT ING
transaction.c:98 info : Created transaction '617XXXXXXX' for subscriber 'CALLASSIGN MOBILE ORIGINATING'
amps.c:1003 info : Assigning channel to call from mobile station
transaction.c:175 info : Transaction state CALL ASSIGN MOBILE ORIGINATING -&gt;
CALL ASSIGN MOBILE ORIGINATING SEND
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
transaction.c:175 info : Transaction state CALL ASSIGN MOBILE ORIGINATING SEND -&gt; CALL
amps.c:951 info : Staying on combined control + voice channel 334
amps.c:959 info : Setup call to network.
call.c:590 info : Incomming call from '617XXXXXXX' to '5551212'
dsp.c:678 notice : SAT level 72.31% quality 98%p)
dsp.c:678 notice : SAT level 78.63% quality 100%)
dsp.c:678 notice : SAT level 78.76% quality 100%)
amps.c:585 info : Detected SAT signal with quality=100.
dsp.c:678 notice : SAT level 78.66% quality 100%)
</pre>
<pre>
amps.c:525 info : Detected Signalling Tone with quality=100.
transaction.c:117 info : Destroying transaction for subscriber '617XXXXXXX'
transaction.c:175 info : Transaction state CALL -&gt; IDLE
call.c:711 info : Call has been released with cause=16
amps.c:481 info : Entering IDLE state, sending Overhead/Filler frames on combined control &amp; paging
&amp; voice channel.
</pre>
<pre>
call.c:457 info : Outgoing call to 617XXXXXXX
amps.c:753 info : Call to mobile station, paging station id '617XXXXXXX'
transaction.c:175 info : Transaction state IDLE -&gt; PAGE
transaction.c:98 info : Created transaction '617XXXXXXX' for subscriber 'PAGE'
amps.c:1025 info : Paging the phone
transaction.c:175 info : Transaction state PAGE -&gt; PAGE SEND
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC == 11)
transaction.c:175 info : Transaction state PAGE SEND -&gt; PAGE REPLY
frame.c:3658 info : RX Level: 60% Quality: 90% Polarity: POSITIVE
frame.c:3630 info : RX RECC: DCC=0
frame.c:2990 info : Received: Word A - Abbreviated Address Word
frame.c:2990 info : Received: Word B - Extended Address Word
frame.c:2990 info : Received: Word C - Serial Number Word
amps.c:655 info : Paging reply 617XXXXXXX (ESN = 825b5f79, Class 6 / Discontinuous / 25 MHz)
transaction.c:175 info : Transaction state PAGE REPLY -&gt; CALL ASSIGN MOBILE TERMINATING
amps.c:1012 info : Assigning channel to call to mobile station
transaction.c:175 info : Transaction state CALL ASSIGN MOBILE TERMINATING -&gt;
CALL ASSIGN MOBILE TERMINATING SEND
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
frame.c:2691 info : Transmit: Word 1 - Abbreviated Address Word
frame.c:2691 info : Transmit: Word 2 - Extended Address Word (SCC != 11)
transaction.c:175 info : Transaction state CALL ASSIGN MOBILE TERMINATING SEND -&gt;
CALL ALERT MOBILE TERMINATING
amps.c:951 info : Staying on combined control + voice channel 334
frame.c:2691 info : Transmit: Mobile Station Control Message Word 1 (SCC == 11)
dsp.c:678 notice : SAT level 76.43% quality 98%
frame.c:2691 info : Transmit: Mobile Station Control Message Word 1 (SCC == 11)
dsp.c:678 notice : SAT level 77.44% quality 99%
frame.c:2691 info : Transmit: Mobile Station Control Message Word 1 (SCC == 11)
dsp.c:678 notice : SAT level 78.58% quality 99%
amps.c:585 info : Detected SAT signal with quality=99.
frame.c:2691 info : Transmit: Mobile Station Control Message Word 1 (SCC == 11)
dsp.c:678 notice : SAT level 79.75% quality 100%
amps.c:525 info : Detected Signalling Tone with quality=100.
call.c:646 info : Call is alerting
transaction.c:175 info : Transaction state CALL ALERT MOBILE TERMINATING -&gt;
CALL ALERT MOBILE TERMINATING SEND
dsp.c:678 notice : SAT level 67.88% quality 98%
dsp.c:678 notice : SAT level 80.28% quality 99%
dsp.c:678 notice : SAT level 80.39% quality 99%
dsp.c:678 notice : SAT level 80.08% quality 100%
</pre>
<pre>
mps.c:527 info : Lost Signalling Tone signal
call.c:689 info : Call has been answered by '617XXXXXXX'
transaction.c:175 info : Transaction state CALL ALERT MOBILE TERMINATING SEND -&gt; CALL
</pre>
<pre>
call.c:479 info : Call hangup
amps.c:836 info : Call has been released by network, releasing call.
amps.c:866 info : Call control releases on voice channel, releasing towards mobile station.
transaction.c:175 info : Transaction state CALL -&gt; CALL RELEASE
amps.c:1048 info : Releasing call to mobile station
transaction.c:175 info : Transaction state CALL RELEASE -&gt; CALL RELEASE SEND
frame.c:2691 info : Transmit: Mobile Station Control Message Word 1 (SCC == 11)
dsp.c:678 notice : SAT level 76.60% quality 100%
transaction.c:117 info : Destroying transaction for subscriber '617XXXXXXX'
transaction.c:175 info : Transaction state CALL RELEASE SEND -&gt; IDLE
amps.c:481 info : Entering IDLE state, sending Overhead/Filler frames on combined control &amp;
paging &amp; voice channel.
</pre>
[<a href="index.html">Back to main page</a>]
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