FreeCalypso > hg > themwi-system-sw

annotate README @ 72:9ca6f0708237

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libsip: add extract_to_tag() function
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 20 Sep 2022 10:54:10 -0800
parents dffcae9bc8a3
children 97317ede320a
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Mychaela Falconia <falcon@freecalypso.org>
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1 This Hg repository contains a work-in-progress named Themyscira Wireless system
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Mychaela Falconia <falcon@freecalypso.org>
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2 software. Themyscira Wireless (ThemWi) is an experimental GSM network operated
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Mychaela Falconia <falcon@freecalypso.org>
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3 by Mother Mychaela of FreeCalypso at a semi-urban/semi-rural location in
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Mychaela Falconia <falcon@freecalypso.org>
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4 Southern California, USA; this GSM network is operated with Osmocom CNI software
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Mychaela Falconia <falcon@freecalypso.org>
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5 components, all running on a single Slackware Linux server. ThemWi system sw
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Mychaela Falconia <falcon@freecalypso.org>
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6 is going to be a suite of daemon processes and command line tools that run on
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Mychaela Falconia <falcon@freecalypso.org>
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7 the same machine as all those Osmocom sw components and provide some additional
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Mychaela Falconia <falcon@freecalypso.org>
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8 functionality that is not provided "out of the box" by Osmocom, most important
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Mychaela Falconia <falcon@freecalypso.org>
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9 of which is outside connectivity to USA PSTN.
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Mychaela Falconia <falcon@freecalypso.org>
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10
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Mychaela Falconia <falcon@freecalypso.org>
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11 Right now we have a themwi-mncc daemon process that connects to OsmoMSC via the
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Mychaela Falconia <falcon@freecalypso.org>
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12 MNCC socket interface provided by the latter and takes the place of OsmoMSC's
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Mychaela Falconia <falcon@freecalypso.org>
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13 mncc_builtin. themwi-mncc switches local calls (from one GSM subscriber to
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Mychaela Falconia <falcon@freecalypso.org>
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14 another) just like mncc_builtin, but it also provides a hook (mtcall_socket)
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Mychaela Falconia <falcon@freecalypso.org>
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15 for routing externally originated calls to GSM (which then become MT calls),
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Mychaela Falconia <falcon@freecalypso.org>
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16 and it will later have a similar interface for routing MO calls to the outside
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Mychaela Falconia <falcon@freecalypso.org>
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17 world. Additional daemon processes that will interface with USA PSTN via SIP
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Mychaela Falconia <falcon@freecalypso.org>
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18 (one process accepting SIP INVITEs from bulkvs.com servers, turning them into
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Mychaela Falconia <falcon@freecalypso.org>
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19 MNCC and sending the calls toward GSM, and another process going the other way)
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Mychaela Falconia <falcon@freecalypso.org>
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20 remain to be implemented.
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Mychaela Falconia <falcon@freecalypso.org>
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21
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Mychaela Falconia <falcon@freecalypso.org>
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22 We are currently experimenting with using bulkvs.com as our USA PSTN
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Mychaela Falconia <falcon@freecalypso.org>
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23 connectivity provider. Like most low-cost PSTN connectivity providers, they
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Mychaela Falconia <falcon@freecalypso.org>
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24 provide the interface to PSTN in the form of a SIP trunk - while I would
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Mychaela Falconia <falcon@freecalypso.org>
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25 absolutely love to get a traditional TDM trunk instead, with SS7 signaling,
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Mychaela Falconia <falcon@freecalypso.org>
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26 such a toy would be far beyond my budget, hence I have to settle for SIP.
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Mychaela Falconia <falcon@freecalypso.org>
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27 Our current status is:
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Mychaela Falconia <falcon@freecalypso.org>
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28
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Mychaela Falconia <falcon@freecalypso.org>
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29 * We have already obtained a block of USA phone numbers (NANP, chosen numbers
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Mychaela Falconia <falcon@freecalypso.org>
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30 from an exchange area local to us) from bulkvs.com;
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Mychaela Falconia <falcon@freecalypso.org>
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31
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Mychaela Falconia <falcon@freecalypso.org>
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32 * These bulkvs-sourced real NANP numbers have been entered as MSISDNs into
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Mychaela Falconia <falcon@freecalypso.org>
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33 OsmoHLR records for our test SIMs operating on ThemWi GSM;
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Mychaela Falconia <falcon@freecalypso.org>
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34
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Mychaela Falconia <falcon@freecalypso.org>
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35 * We can successfully dial calls from one ThemWi GSM phone to another, with
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Mychaela Falconia <falcon@freecalypso.org>
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36 themwi-mncc understanding all dialing formats that are considered standard
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Mychaela Falconia <falcon@freecalypso.org>
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37 for cellular phone networks in USA (full international, or 11 digits starting
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Mychaela Falconia <falcon@freecalypso.org>
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38 with '1' but no '+', or 10 digits only), as well as our own non-standard
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Mychaela Falconia <falcon@freecalypso.org>
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39 shorthand dialing method with only 4 digits;
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Mychaela Falconia <falcon@freecalypso.org>
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40
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Mychaela Falconia <falcon@freecalypso.org>
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41 * Whenever someone dials one of our NANP numbers from the outside world, bulkvs
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Mychaela Falconia <falcon@freecalypso.org>
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42 servers send UDP SIP INVITE packets to our server, and by dumping them with
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Mychaela Falconia <falcon@freecalypso.org>
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43 our sip-udp-dump utility, we can see exactly what we have to work with;
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Mychaela Falconia <falcon@freecalypso.org>
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44
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Mychaela Falconia <falcon@freecalypso.org>
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45 * The rest remains to be implemented.