FreeCalypso > hg > themwi-system-sw
comparison doc/Use-outside-USA @ 268:d6630a2d6e80
doc: beginning of numbering plan documentation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 13 Nov 2023 18:20:57 -0800 |
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children | def9f6e4f49e |
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267:81958b35f74d | 268:d6630a2d6e80 |
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1 Themyscira Wireless system sw was written for deployment in USA, with a key goal | |
2 of full interconnection with USA PSTN. However, as the software grows in | |
3 functionality and becomes more interesting, there is a growing possibility that | |
4 someone some day may be interested in running our sw outside of USA, or outside | |
5 of North American continent in general. This document outlines some thoughts | |
6 for how it might be possible to adapt the present software for use in other | |
7 geopolitical regions. | |
8 | |
9 The first point that needs to be made clear is that software has no extrasensory | |
10 psychic powers - it cannot divine where you are located in physical geography, | |
11 and it doesn't care. Instead the aspects which telephony software cares about | |
12 are dialing formats and numbering plans - and in the case of Themyscira Wireless | |
13 system sw, the "thing" to which our sw is tied is NANP, the telephone numbering | |
14 plan of +1 country code. | |
15 | |
16 If anyone is contemplating the idea of running ThemWi system sw in a country | |
17 other than USA, the first question that needs to be answered is: are you looking | |
18 to interconnect with your country's national public telephone network similarly | |
19 to how we (ThemWi) interconnect with USA PSTN, or are you only interested in | |
20 running an isolated (test or toy) network without interconnection to PSTN? | |
21 | |
22 Interconnecting with PSTN outside of USA | |
23 ======================================== | |
24 | |
25 Suppose that your country has SIP trunk providers who operate similarly to those | |
26 in USA: you rent a range of numbers in your country's national telephone | |
27 numbering plan, calls addressed to those numbers are delivered to your Internet- | |
28 connected server via SIP, and you can likewise use SIP to dial outbound calls. | |
29 At this point our current software will NOT work as-is - it will require | |
30 modifications to work with the local numbering plan being some other than NANP. | |
31 | |
32 Please read our NANP-specifics article for the explanation of why our current | |
33 software is tied to NANP, and in exactly what ways. That article also gives an | |
34 outline of what changes would need to be made to support other national | |
35 telephone numbering plans. | |
36 | |
37 Running an isolated instance of Osmocom CNI + ThemWi system sw | |
38 ============================================================== | |
39 | |
40 If you are not interconnecting with your country's public phone network with | |
41 real phone numbers from your country's national telephone numbering plan, then | |
42 it doesn't matter where you are located in terms of physical geography - your | |
43 network will be either fully isolated (self-contained) or perhaps interconnected | |
44 with other hobbyist or community networks - but not with general PSTN. | |
45 | |
46 If you would like to run ThemWi system sw in such non-PSTN-connected | |
47 configuration, the easiest way is to use fake NANP numbers - see | |
48 Fake-NANP-numbers article (to be written) for more info. |