Project

General

Profile

Wiki » History » Version 8

laforge, 01/10/2017 02:14 AM

1 4 laforge
{{>toc}}
2 1 laforge
3 4 laforge
*DISCLAIMER: No information here is officially provided by Qualcomm, Quectel or other modem manufacturers. It is the result of independent third-party research and should be taken with a a grain of salt*
4 4 laforge
5 4 laforge
h1. Qualcomm based cellular data modems wih Linux
6 4 laforge
7 4 laforge
This is the place where we gather information about the Quectel [[EC20]], [[EC21]] and [[EC25]] modules, as well as other Qualcomm based cellular modems with built-in Linux processor.
8 4 laforge
9 5 laforge
Please help us to grow this resource for the benefit of the general public.  
10 5 laforge
11 5 laforge
It is a shame that Qualcomm doesn't disclose proper documentation for their products to the general public.  There are many possible applications and use cases which are possible once more information about those devices is publicly available.  Having the power of running customer/user-specific programs inside the Linux in the modem is very powerful, and can for example eliminate the use of a dedicated external processor in many M2M/IoT applications.
12 4 laforge
13 8 laforge
An overview of Qualcomm Gobi Modems and their specs can be found at https://www.qualcomm.com/media/documents/files/gobi-product-specs.pdf
14 8 laforge
15 8 laforge
From that table, we suspect that all cellular modem chips that have a "Cortex A5" application processor are candidates for the Qualcomm Linux based modems.
16 8 laforge
17 4 laforge
h2. Wiki structure
18 4 laforge
19 4 laforge
Please see the below auto-generated hierarchical index of wiki pages:
20 4 laforge
21 1 laforge
{{child_pages()}}
22 1 laforge
23 7 laforge
h2. Mailing List
24 7 laforge
25 7 laforge
We have started the qc-linux-modems@lists.osmocom.org mailing list for any related discussions.
26 7 laforge
27 7 laforge
You can manage your subscription at https://lists.osmocom.org/mailman/listinfo/qc-linux-modems
28 4 laforge
29 2 laforge
h2. related reading
30 2 laforge
31 2 laforge
https://media.defcon.org/DEF%20CON%2023/DEF%20CON%2023%20presentations/DEFCON-23-Mickey-Shkatov-Jesse-Michael-Scared-poopless-LTE-and-your-laptop-UPDATED.pdf
32 1 laforge
https://www.blackhat.com/docs/us-14/materials/us-14-Solnik-Cellular-Exploitation-On-A-Global-Scale-The-Rise-And-Fall-Of-The-Control-Protocol.pdf
33 4 laforge
34 6 laforge
h3. 33C3 Talk by Holger Freyther and Harald Welte
35 6 laforge
36 6 laforge
At 33C3:"http://events.ccc.de/congress/2016", Holger and Harald first publicly presented about this project.
37 6 laforge
* Video Recording: https://media.ccc.de/v/33c3-8151-dissecting_modern_3g_4g_cellular_modems
38 6 laforge
* Slides (PDF): https://fahrplan.events.ccc.de/congress/2016/Fahrplan/system/event_attachments/attachments/000/003/151/original/Dissecting_modern_%283G_4G%29_cellular_modems.pdf
39 6 laforge
* Slides (HTML): http://git.gnumonks.org/laforge-slides/plain/2016/cellular_modems_33c3/33c3-modems.html
40 6 laforge
41 4 laforge
h2. Information sources
42 4 laforge
43 4 laforge
All information here is based on publicly found documents on the internet as well as studying the source code released by Qualcomm, Quectel and others as well as bits of reverse engineering on the devices themselves.  We commit to _legal_ forms of reverse engineering, such as running software in emulators, using tracing and debugging facilities.
Add picture from clipboard (Maximum size: 48.8 MB)