Difference between revisions of "Guerrilla VoIP"

From Hackerspace ACKspace
Jump to: navigation, search
m (fixed ATA power cintumption)
m (Xopr moved page Guerilla VoIP to Guerrilla VoIP: After years I've realised, there's a typo)
 
(7 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
{{Project
 
{{Project
 
|Featured=No
 
|Featured=No
|State=Planned
+
|State=Active
 
|Members=xopr
 
|Members=xopr
 
|Description=low cost communication node
 
|Description=low cost communication node
Line 7: Line 7:
 
}}
 
}}
 
== synopsis ==
 
== synopsis ==
{{InfoBox
+
Try to:
|Title=Note
+
* connect anything that can carry a voice channel, or, preferably, a data channel
|Text=Some essential hardware broke; need to rebuild it and add some extra safety features
+
* feed from any (cheap/renewable) energy source
}}
+
* make it weather resistant and transportable
Create a low cost communication node (with VoIP as a base), trying to connect as many as possible types of links, for example:
+
* consider standards
 +
 
 +
<gallery>
 +
image:guerilla_voip_in_use.jpg|Guerilla VoIP in active use (as a temporary set up of the space phone)
 +
image:guerilla_voip_big_big brother.jpg|After my setup was running, I came across a real world example: a defense set-up. I found the similarities hillarious.
 +
</gallery>
 +
 
 +
 
 +
== implementation ==
 +
 
 +
=== connect anything that can carry a voice/data channel ===
 +
 
 
* copper/fibre/WiFi network
 
* copper/fibre/WiFi network
* DECT/POTS telephony
+
* DECT/POTS/GSM telephony
 
* SIP/<abbr title="Skinny Call Control Protocol">SCCP</abbr>
 
* SIP/<abbr title="Skinny Call Control Protocol">SCCP</abbr>
 
* HAM radio (or preferrably, <abbr title="Citizen's Band">CB</abbr> radio: 27MC/PMR)
 
* HAM radio (or preferrably, <abbr title="Citizen's Band">CB</abbr> radio: 27MC/PMR)
 
* copper/WiFi/USB uplink
 
* copper/WiFi/USB uplink
  
 +
=== feed from any energy source ===
 +
 +
cheap/renewable:
 +
* solar power support
 +
*: this is the easiest renewable energy source: panels are affordable and the sun is more ore less abundant.
 +
* battery backup support preferred
 +
*: a sealed lead acid (SLA) battery is affordable, easy to come by, easy to charge and maintenance free.  Their downside is bulkiness and weight. 12V 7Ah is a good ratio between weight and energy.
 +
 +
=== weather resistant and transportable ===
 +
Make sure the electronics are encased in a sturdy, weatherproof housing.
 +
It should also be easily transportable and affordable.
 +
 +
The best thing that will apply is an ''ammo case'' from an army surplus shop.
 +
 +
=== consider standards ===
  
It also could need some of the following functionality:
+
==== electrically ====
* PoE service (to drive phones, remote switches/accesspoints)
 
* battery supported/powered (in case of power failures/lack of power)
 
* Efficient power converter(s) when running on battery
 
* sturdy compact waterproof casing
 
  
<gallery>
+
* mains input: 100-250V~ 50-60Hz
image:guerilla_voip_in_use.jpg|Guerilla VoIP in active use (as a temporary set up of the space phone)
+
* internal voltage rails:
image:guerilla_voip_big_big brother.jpg|After my setup was running, I came across a real world example: a defense set-up. I found the similarities hillarious.
+
** 5V: standard for raspberry pi and some network devices
</gallery>
+
** 12V: battery 'standard' and standard for other network devices
 +
** 48V: Power over Ethernet and telephony standard
  
== prototyping ==
+
==== connectors ====
 +
* MC4 connectors: solar
 +
* Anderson powerpole plug: UPS
 +
* cigarette lighter plug (ANSI/SAE J563): cars
 +
* powerlet plug (ISO 4165): alternative/old cars and motorcycles
 +
* double banana plug (19mm/0.75" spacing): equipment standard
  
So to make the first prototype, I chose the following:
+
=== current version ===
 +
The current version has:
 
* ammo box
 
* ammo box
* 7Ah battery
+
* 7Ah SLA battery
* step-down converter 12->5V
+
* banana/screw terminal
* step-up converter 12v->48V
+
* weatherproof ethernet outlet
* Fritz!Box 7270 (NAT, FxS, FxO, DECT)
+
* 12-volt cigarette lighter receptacle
* two [[Raspberry Pi]]s running FreeSWITCH (external queue, internal SCCP server), DHCP and TFTP
+
* 3D printed insert
 +
* fuse box
 +
* switches for device targeting power and power state preview
 
* Netgear GS110TP (8xPoE + 2xSFP)
 
* Netgear GS110TP (8xPoE + 2xSFP)
 +
* a couple [[Telephone system:Cisco PoE hack]] cable, but the switch supports pre-standard PoE
 +
* electronics:
 +
*: 1 on-off-on momentarily 3-pole double throw: battery/external/outlet input and voltage rail status
 +
*: 3 on-off-on switch 1-pole double throw: source-destination rail (application/charge)
 +
*: 6 fuses (1, 1, 4, 4, 7.5, 7.5) for 5V rail, 10-15V rail, 48V rail, outlet, battery, ext. power
 +
*: 3 LEDs 2v 20mA
 +
*: 6 resistors (4x600R, 225R, 150R)
 +
*: 2 10W resistors (2R, 20R)
 +
*: 2 schottky diodes 4-10A
 +
*: 2 DC-DC converters (5V 3A, 48V 1.25A)
 +
*: 3 crowbar circuits (5V, 15V, 48V)
 +
 +
=== todo ===
 +
* upload models and schematics
 +
* 3D print inlay for Switch/PI holder
 +
* install fuses and crowbar circuit
 +
* install state leds
 +
* install step-down converter 12->5V
 +
* install step-up converter 12v->48V
 +
* Raspberry PI or Orange PI
 +
* NL dialplan (FS/Cisco)
 +
 +
 +
== prototyping ==
 +
=== USB PD (USB-C) ===
 +
It is possible to power the PoE switch with two USB-C powerbank for off-the-grid usage, ideal for a [[hackers on a bike]] tour. All you need is:
 +
* 2 USB-C powerbanks that supports 20V (like the [https://tweakers.net/pricewatch/1369296/xiaomi-mi-power-bank-3.html Xiaomi Mi Powerbank 3], sometimes as low as €35,- each)
 +
: ideally, pass-through/UPS USB-C power banks like the [https://www.zmi.com/collections/new-releases/products/powerpack-no-20-qb826g-25000-mah-backup-battery-210w-max-output Zmi PowerPack No. 20 Model QB826G]  would be best, but they're 4 times as expensive
 +
* 2 USB-C to USB-C cables
 +
* 2 [https://www.ebay.com/itm/294691148942 ZY12PDN USB-C Fast Charge Trigger Poll Detector], set to 20V, connected in series (around €5,- each)
 +
* a barrel jack 5.5x2.5mm to power the switch
 +
 +
See the PCB in [[Media:HoaB-upgrades.jpg|this picture]] to get an idea.
 +
 +
Note that since the banks are connected in series, one shield/ground is lifted 20 volts; don't let any USB ground touch the other powerbank's ground in any way (also goes for the USB-A ports in this set-up; it will fail spectacularly)!
 +
 
=== hardware ===
 
=== hardware ===
 +
 
==== connectivity/infra ====
 
==== connectivity/infra ====
 
{| class="wikitable"
 
{| class="wikitable"
! HW
+
! HW !! price range !! voltage !! power consumption !! copper/Gbit !! PoE !! fibre !! VLAN !! 2.4GHz !! 5GHz !! DSL !! ISDN !! POTS !! DECT !! USB
! price range
 
! voltage
 
! power consumption
 
! copper/Gbit
 
! PoE
 
! fibre
 
! VLAN
 
! 2.4GHz
 
! 5GHz
 
! DSL
 
! ISDN
 
! POTS
 
! DECT
 
! USB
 
 
|-
 
|-
| [[Fritz!Box]] 7270
+
| [[Fritz!Box]] 7270 || &euro; 50-213 || 5.5-15v || 4.3W - 5.3W || 4/0 || ||  || ? || &#x2713; || &#x2713; || &#x2713; || &#x2713; || 2&times;FXS / 1&times;FXO || 5 (6?)<abbr title="handsets">hs</abbr> || 1&times;2.0
| &euro; 50-213
 
| 5.5-15v
 
| 4.3W - 5.3W
 
| 4/0
 
|  
 
|  
 
| ?
 
| &#x2713;
 
| &#x2713;
 
| &#x2713;
 
| &#x2713;
 
| 2&times;FXS / 1&times;FXO
 
| 5 (6?)<abbr title="handsets">hs</abbr>
 
| 1&times;2.0
 
 
|-
 
|-
| [[GL-Inet]]
+
| [[GL-Inet]] || &euro;22-30 || 5v || 1W || 2/0 || ||  || &#x2713; || &#x2713; || ||  ||  ||  || || 1&times;2.0
| &euro;22-30
 
| 5v
 
| 1W
 
| 2/0
 
|  
 
|  
 
| &#x2713;
 
| &#x2713;
 
|  
 
|  
 
|  
 
|  
 
|  
 
| 1&times;2.0
 
 
|-
 
|-
| [[TP WR-703n]]
+
| [[TP WR-703n]] || &euro;17-25 || 5v || 1W || 1/0 || ||  || &#x2713; || &#x2713; || ||  ||  ||  || || 1&times;2.0
| &euro;17-25
 
| 5v
 
| 1W
 
| 1/0
 
|  
 
|  
 
| &#x2713;
 
| &#x2713;
 
|  
 
|  
 
|  
 
|  
 
|  
 
| 1&times;2.0
 
 
|-
 
|-
| Netgear GS110TP
+
| Netgear GS110TP || &euro;126-140 (<abbr title="ordered on amazon.de with discount last May (2017)">&euro;99.64</abbr>) || 48v || 4W || 8/8 || 8 || 2 || &#x2713; || ||  ||  ||  || || ||
| &euro;126-140 (<abbr title="ordered on amazon.de with discount last May (2017)">&euro;99.64</abbr>)
 
| 48v
 
| 4W
 
| 8/8
 
| 8
 
| 2
 
| &#x2713;
 
|  
 
|  
 
|  
 
|  
 
|  
 
|  
 
|
 
 
|-
 
|-
| [http://nl.tp-link.com/products/details/cat-41_TL-SG108PE.html TP Link TL-SG108PE]
+
| [http://nl.tp-link.com/products/details/cat-41_TL-SG108PE.html TP Link TL-SG108PE] || &euro;65 || 48v || 5.2w || 8/8 || 4 || || &#x2713; || || || || || || ||
| &euro;65
 
| 48v
 
| 5.2w
 
| 8/8
 
| 4
 
|  
 
| &#x2713;
 
|  
 
|  
 
|  
 
|  
 
|  
 
|  
 
|
 
 
|-
 
|-
| [[Siemens_Gigaset#N510_IP_PRO|Siemens Gigaset N510 IP PRO]]
+
| [[Siemens_Gigaset#N510_IP_PRO|Siemens Gigaset N510 IP PRO]] || <abbr title="Bought at broadbandbuyer.co.uk Sep 2016">&pound;53.94</abbr> (&euro;65.39) || 6.5v || 1.2-1.3W || 1/? || <abbr title="supports PoE PD">&#x2713;</abbr> || || &#x2713; || ||  || || ||  || 6<abbr title="handsets">hs</abbr>,4<abbr title="simultaneous calls">sc</abbr> ||
| <abbr title="Bought at broadbandbuyer.co.uk Sep 2016">&pound;53.94</abbr> (&euro;65.39)
 
| 6.5v
 
| 1.2-1.3W
 
| 1/?
 
| <abbr title="supports PoE PD">&#x2713;</abbr>
 
|  
 
| &#x2713;
 
|  
 
|  
 
|  
 
|  
 
|  
 
| 6<abbr title="handsets">hs</abbr>,4<abbr title="simultaneous calls">sc</abbr>
 
|
 
 
|}
 
|}
 
  
  
 
==== hard phones / ATAs ====
 
==== hard phones / ATAs ====
 
{| class="wikitable"
 
{| class="wikitable"
! HW
+
! HW !! price range !! voltage !! power consumption !! copper/Gbit !! PoE !! VLAN !! SIP !! lines !! extensible !! tested on [[FreeSWITCH]]
! price range
 
! voltage
 
! power consumption
 
! copper/Gbit
 
! PoE
 
! VLAN
 
! SIP
 
! lines
 
! extensible
 
! tested on [[FreeSWITCH]]
 
 
|-
 
|-
| [[Cisco 79xx|Cisco 7905]]
+
| [[Cisco 79xx|Cisco 7905]] || &euro; 10-50 || 48v ||  || 1/0 || &#x2713; || || &#x2713; || 1(?) ||  || &#x2713;
| &euro; 10-50
 
| 48v
 
|  
 
| 1/0
 
| &#x2713;
 
|
 
| &#x2713;
 
| 1(?)
 
|  
 
| &#x2713;
 
 
|-
 
|-
| [[Cisco 79xx|Cisco 7910]]
+
| [[Cisco 79xx|Cisco 7910]] ||  || 48v ||  || 1/0 || &#x2713; || &#x2713; ||  || 6(?) || || &#x2713;
|  
 
| 48v
 
|  
 
| 1/0
 
| &#x2713;
 
| &#x2713;
 
|  
 
| 6(?)
 
|
 
| &#x2713;
 
 
|-
 
|-
| [[Cisco 79xx|Cisco 7940/7960]]
+
| [[Cisco 79xx|Cisco 7940/7960]] || &euro; 10-50 || 48v || 5W || 2/0 || &#x2713; || &#x2713; || &#x2713; || 2/6 || &#x2713; || &#x2713;
| &euro; 10-50
 
| 48v
 
| 5W
 
| 2/0
 
| &#x2713;
 
| &#x2713;
 
| &#x2713;
 
| 2/6
 
| &#x2713;
 
| &#x2713;
 
 
|-
 
|-
| [[Cisco 79xx|Cisco 7941/7961]]
+
| [[Cisco 79xx|Cisco 7941/7961]] ||  || 48v ||  || 2/2(?) || &#x2713; || &#x2713; || &#x2713;(?) || 2/6 || &#x2713; ||
|  
 
| 48v
 
|  
 
| 2/2(?)
 
| &#x2713;
 
| &#x2713;
 
| &#x2713;(?)
 
| 2/6
 
| &#x2713;
 
|
 
 
|-
 
|-
| [[Avaya 4620SW]]
+
| [[Avaya 4620SW]] ||  || 48v ||  || 2/0? || &#x2713; || &#x2713;(?) || &#x2713;(?) || ? || &#x2713; ||  
|  
 
| 48v
 
|  
 
| 2/0?
 
| &#x2713;
 
| &#x2713;(?)
 
| &#x2713;(?)
 
| ?
 
| &#x2713;
 
|  
 
 
|-
 
|-
| [[Telephone_system:Analog_Telephone_Adapter#Linksys_PAP2T|Linksys PAP2T]]
+
| [[Telephone_system:Analog_Telephone_Adapter#Linksys_PAP2T|Linksys PAP2T]] ||  || 5v || 10W || 1/0 || &#x2713; || || &#x2713; || 2&times;FXS ||  || &#x2713;
|  
 
| 5v
 
| 10W
 
| 1/0
 
| &#x2713;
 
|
 
| &#x2713;
 
| 2&times;FXS
 
|  
 
| &#x2713;
 
 
|-
 
|-
| [[Telephone_system:Analog_Telephone_Adapter#Sipura_SPA3000|Sipura SPA3000]]
+
| [[Telephone_system:Analog_Telephone_Adapter#Sipura_SPA3000|Sipura SPA3000]] ||  || 5v || 7.5W || 1/0 || &#x2713; || || &#x2713; || 1&times;FXS 1&times;FXO ||  || &#x2713;
|  
 
| 5v
 
| 7.5W
 
| 1/0
 
| &#x2713;
 
|
 
| &#x2713;
 
| 1&times;FXS 1&times;FXO
 
|  
 
| &#x2713;
 
 
|}
 
|}
 +
  
 
=== some power tests ===
 
=== some power tests ===
 
+
==== hardware ====
 
{| class="wikitable"
 
{| class="wikitable"
 
! hardware || power source || U || I || P<sub>approximated</sub>
 
! hardware || power source || U || I || P<sub>approximated</sub>
Line 280: Line 170:
 
| cellphone charging || lab power supply |||||| 5W<sup>[2]</sup>
 
| cellphone charging || lab power supply |||||| 5W<sup>[2]</sup>
 
|-
 
|-
| Minimal setup:<br/>(router+switch+Pi+phone) |||||||| 16W<sup>[3]</sup>
+
|-
 +
| A) Netgear, Pi, 7940, Gl.inet || SLA battery || 12V ||  || 12W<sup>[3]</sup>
 +
|-
 +
| B) Netgear, Pi, 7940, Gl.inet, Gigaset || SLA battery || 12V ||  || 13.3W<sup>[3]</sup>
 +
|-
 +
| C) Netgear, Pi, 7940, FritzBox || SLA battery || 12V || || 16.3W<sup>[3]</sup>
 
|}
 
|}
 
:<sup>[1]</sup> Approximated by calculating deviation from the lab power supply combined values, which was about 5% off 12V
 
:<sup>[1]</sup> Approximated by calculating deviation from the lab power supply combined values, which was about 5% off 12V
 
:<sup>[2]</sup> Approximated by subtracting all calculated items from the complete setup
 
:<sup>[2]</sup> Approximated by subtracting all calculated items from the complete setup
:<sup>[3]</sup> Approximated by just adding up individual items
+
:<sup>[3]</sup> Approximated by just adding up individual items, using Netgear GS110TP PoE, Raspberry Pi, Gl.inet, Siemens Gigaset N510 and/or Fritz!box
 +
 
 +
==== solar panel and battery ====
 +
Did some rough estimations with a 15 Watt solar panel (using a [https://github.com/apollo-ng/UCSSPM/blob/master/ucsspm.py Unified Clear-Sky Solar Prediction Model script]): on a good summer day it will yield 240W in 17 hours (slightly below 15 megajoule), and on a clear winter day it will yield 25W in 7 hours (630 kilojoule).
 +
 
 +
A 12v SLA battery is full with >12.85V, empty with 12.00V (at 25% capacity) and fully depleted at 11.80V. I came to the conclusion that the effective energy is about 9.5&times;Ah; given a 7Ah battery, this will yield about 66.5Wh.
 +
 
 +
Given the hardware setups described in the [[#hardware_2|previous paragraph]] (note that these values are theoretical maximums):
 +
{| class="wikitable"
 +
! scenario || battery run time || solar+battery run time (winter/summer)
 +
|-
 +
| A || 5:30h || 7:35h/25:30h
 +
|-
 +
| B || 5:00h || 6:55h/23:00h
 +
|-
 +
| C || 4:00h || 5:35h/18:45h
 +
|}
  
 
<gallery>
 
<gallery>
Line 296: Line 207:
 
* if the pre-standard CP-79x0 is connected using the PoE adapter hack, the Netgear GS110TP doesn't power, when you unplug it, it will enable power within 5 seconds; plug in, and the phone boots.
 
* if the pre-standard CP-79x0 is connected using the PoE adapter hack, the Netgear GS110TP doesn't power, when you unplug it, it will enable power within 5 seconds; plug in, and the phone boots.
 
* if you configure the administrative VLAN, the phone will fetch a DHCP lease on that VLAN, allowing you to seperately set up dnsmasq on a Raspberry Pi
 
* if you configure the administrative VLAN, the phone will fetch a DHCP lease on that VLAN, allowing you to seperately set up dnsmasq on a Raspberry Pi
 +
 +
 
== inventory ==
 
== inventory ==
 
* Fritz!Boxes
 
* Fritz!Boxes
Line 309: Line 222:
 
: 1&times;Profoon PDX2900
 
: 1&times;Profoon PDX2900
 
: + what's not yet inventoried at the space
 
: + what's not yet inventoried at the space
== done ==
 
* the first version works, but still needs some manual labor
 
* [[Telephone system:Cisco PoE hack]] cable
 
* Cisco NL dialplan
 
* tested with battery; float charging device still has to be made (haven't measured how long it would run on a single charge though, but enough time to do some important phone calling)
 
  
Also, I've been playing with the Banana Pi, since the Raspberry Pi sometimes chokes on input digits.
+
 
Here is a log/some steps to reproduce
+
== log and ideas ==
 +
A list of ideas to consider:
 +
* modular 3D insert for different single board computers
 +
* extra network outlet (since a single one is more or less useless)
 +
* float or CC/CV charger, MPPT solar charger
 +
* external antenna mount
 +
* temperature monitor
 +
 
 +
Here is a log/some steps to reproduce:
 +
 
 
=== get the basics ===
 
=== get the basics ===
 
<pre>apt-get install vlan dnsmasq make curl</pre>
 
<pre>apt-get install vlan dnsmasq make curl</pre>
 +
  
 
=== create and install FreeSWITCH ===
 
=== create and install FreeSWITCH ===
Line 336: Line 254:
 
chmod -R ug=rwX,o= /usr/local/freeswitch/
 
chmod -R ug=rwX,o= /usr/local/freeswitch/
 
chmod -R u=rwx,g=rx /usr/local/freeswitch/bin/*</pre>
 
chmod -R u=rwx,g=rx /usr/local/freeswitch/bin/*</pre>
 +
  
 
=== prepare VLAN ===
 
=== prepare VLAN ===
Line 342: Line 261:
 
echo 8021q >> /etc/modules
 
echo 8021q >> /etc/modules
 
vconfig set_name_type DEV_PLUS_VID_NO_PAD</pre>
 
vconfig set_name_type DEV_PLUS_VID_NO_PAD</pre>
 +
  
 
=== set-up network and VLAN ===
 
=== set-up network and VLAN ===
Line 366: Line 286:
 
     netmask 255.255.255.0
 
     netmask 255.255.255.0
 
     vlan-raw-device eth0</pre>
 
     vlan-raw-device eth0</pre>
 +
 +
 
=== dnsmasq ===
 
=== dnsmasq ===
 
<pre>vi /etc/dnsmasq.conf</pre>
 
<pre>vi /etc/dnsmasq.conf</pre>
Line 485: Line 407:
 
* design and create (or buy) small-sized float charger (13.8V 2A) with overcurrent protection, if needed
 
* design and create (or buy) small-sized float charger (13.8V 2A) with overcurrent protection, if needed
  
[[Category:Telephony]]
+
== links ==
 +
Some random links:
 +
* https://www.agentschaptelecom.nl/onderwerpen/telekwetsbaarheid
 +
* https://www.agentschaptelecom.nl/actueel/nieuws/2018/maart/21/zonder-stroom-ook-geen-telecommunicatie
 +
* https://tweakers.net/nieuws/136473/nederlanders-zijn-onvoorbereid-op-uitval-van-communicatie-bij-stroomstoring.html
 +
 
 +
[[Category:Telephony]][[Category:FreeSWITCH]][[Category:PD Type-C]]

Latest revision as of 08:28, 31 July 2022

Project: Guerrilla VoIP
Featured: No
State Active
Members xopr
GitHub No GitHub project defined. Add your project here.
Description low cost communication node
Picture
Guerilla voip in use.jpg

synopsis

Try to:

  • connect anything that can carry a voice channel, or, preferably, a data channel
  • feed from any (cheap/renewable) energy source
  • make it weather resistant and transportable
  • consider standards


implementation

connect anything that can carry a voice/data channel

  • copper/fibre/WiFi network
  • DECT/POTS/GSM telephony
  • SIP/SCCP
  • HAM radio (or preferrably, CB radio: 27MC/PMR)
  • copper/WiFi/USB uplink

feed from any energy source

cheap/renewable:

  • solar power support
    this is the easiest renewable energy source: panels are affordable and the sun is more ore less abundant.
  • battery backup support preferred
    a sealed lead acid (SLA) battery is affordable, easy to come by, easy to charge and maintenance free. Their downside is bulkiness and weight. 12V 7Ah is a good ratio between weight and energy.

weather resistant and transportable

Make sure the electronics are encased in a sturdy, weatherproof housing. It should also be easily transportable and affordable.

The best thing that will apply is an ammo case from an army surplus shop.

consider standards

electrically

  • mains input: 100-250V~ 50-60Hz
  • internal voltage rails:
    • 5V: standard for raspberry pi and some network devices
    • 12V: battery 'standard' and standard for other network devices
    • 48V: Power over Ethernet and telephony standard

connectors

  • MC4 connectors: solar
  • Anderson powerpole plug: UPS
  • cigarette lighter plug (ANSI/SAE J563): cars
  • powerlet plug (ISO 4165): alternative/old cars and motorcycles
  • double banana plug (19mm/0.75" spacing): equipment standard

current version

The current version has:

  • ammo box
  • 7Ah SLA battery
  • banana/screw terminal
  • weatherproof ethernet outlet
  • 12-volt cigarette lighter receptacle
  • 3D printed insert
  • fuse box
  • switches for device targeting power and power state preview
  • Netgear GS110TP (8xPoE + 2xSFP)
  • a couple Telephone system:Cisco PoE hack cable, but the switch supports pre-standard PoE
  • electronics:
    1 on-off-on momentarily 3-pole double throw: battery/external/outlet input and voltage rail status
    3 on-off-on switch 1-pole double throw: source-destination rail (application/charge)
    6 fuses (1, 1, 4, 4, 7.5, 7.5) for 5V rail, 10-15V rail, 48V rail, outlet, battery, ext. power
    3 LEDs 2v 20mA
    6 resistors (4x600R, 225R, 150R)
    2 10W resistors (2R, 20R)
    2 schottky diodes 4-10A
    2 DC-DC converters (5V 3A, 48V 1.25A)
    3 crowbar circuits (5V, 15V, 48V)

todo

  • upload models and schematics
  • 3D print inlay for Switch/PI holder
  • install fuses and crowbar circuit
  • install state leds
  • install step-down converter 12->5V
  • install step-up converter 12v->48V
  • Raspberry PI or Orange PI
  • NL dialplan (FS/Cisco)


prototyping

USB PD (USB-C)

It is possible to power the PoE switch with two USB-C powerbank for off-the-grid usage, ideal for a hackers on a bike tour. All you need is:

ideally, pass-through/UPS USB-C power banks like the Zmi PowerPack No. 20 Model QB826G would be best, but they're 4 times as expensive

See the PCB in this picture to get an idea.

Note that since the banks are connected in series, one shield/ground is lifted 20 volts; don't let any USB ground touch the other powerbank's ground in any way (also goes for the USB-A ports in this set-up; it will fail spectacularly)!

hardware

connectivity/infra

HW price range voltage power consumption copper/Gbit PoE fibre VLAN 2.4GHz 5GHz DSL ISDN POTS DECT USB
Fritz!Box 7270 € 50-213 5.5-15v 4.3W - 5.3W 4/0 ? 2×FXS / 1×FXO 5 (6?)hs 1×2.0
GL-Inet €22-30 5v 1W 2/0 1×2.0
TP WR-703n €17-25 5v 1W 1/0 1×2.0
Netgear GS110TP €126-140 (€99.64) 48v 4W 8/8 8 2
TP Link TL-SG108PE €65 48v 5.2w 8/8 4
Siemens Gigaset N510 IP PRO £53.94 (€65.39) 6.5v 1.2-1.3W 1/? 6hs,4sc


hard phones / ATAs

HW price range voltage power consumption copper/Gbit PoE VLAN SIP lines extensible tested on FreeSWITCH
Cisco 7905 € 10-50 48v 1/0 1(?)
Cisco 7910 48v 1/0 6(?)
Cisco 7940/7960 € 10-50 48v 5W 2/0 2/6
Cisco 7941/7961 48v 2/2(?) ✓(?) 2/6
Avaya 4620SW 48v 2/0? ✓(?) ✓(?) ?
Linksys PAP2T 5v 10W 1/0 2×FXS
Sipura SPA3000 5v 7.5W 1/0 1×FXS 1×FXO


some power tests

hardware

hardware power source U I Papproximated
two Raspberry Pis, step down drill battery pack 12.6V[1] 330mA 2×2W
Cisco CP7940, step up drill battery pack 12.6V[1] 360mA - 450mA 5W
Fritz!box (wifi off), direct lab power supply 12V 360mA (idle) - 440mA
(42% - 52%, top ~880mA)
4.3W - 5.3W
15V 250mA (idle) 3.8W
Netgear GS110TP PoE, step up lab power supply 12V 330mA 4W
Netgear GS110TP PoE +
Cisco CP7940, step up
lab power supply 12V 740mA 9W
Complete set: 2 RasPis,
Fritz!box, switch,
phone + cellphone charging
lab power supply 12V 2000mA 24W
13.8V 1600mA 22W
cellphone charging lab power supply 5W[2]
A) Netgear, Pi, 7940, Gl.inet SLA battery 12V 12W[3]
B) Netgear, Pi, 7940, Gl.inet, Gigaset SLA battery 12V 13.3W[3]
C) Netgear, Pi, 7940, FritzBox SLA battery 12V 16.3W[3]
[1] Approximated by calculating deviation from the lab power supply combined values, which was about 5% off 12V
[2] Approximated by subtracting all calculated items from the complete setup
[3] Approximated by just adding up individual items, using Netgear GS110TP PoE, Raspberry Pi, Gl.inet, Siemens Gigaset N510 and/or Fritz!box

solar panel and battery

Did some rough estimations with a 15 Watt solar panel (using a Unified Clear-Sky Solar Prediction Model script): on a good summer day it will yield 240W in 17 hours (slightly below 15 megajoule), and on a clear winter day it will yield 25W in 7 hours (630 kilojoule).

A 12v SLA battery is full with >12.85V, empty with 12.00V (at 25% capacity) and fully depleted at 11.80V. I came to the conclusion that the effective energy is about 9.5×Ah; given a 7Ah battery, this will yield about 66.5Wh.

Given the hardware setups described in the previous paragraph (note that these values are theoretical maximums):

scenario battery run time solar+battery run time (winter/summer)
A 5:30h 7:35h/25:30h
B 5:00h 6:55h/23:00h
C 4:00h 5:35h/18:45h

interesting facts

  • Fritz!box has a switching regulator to 5V tested between 5.5V and 15V (drops off at 5.3V idle and elco at power supply segment is rated 16V)
  • PoE hack adapter connected pin 1 (white-orange) and pin 3 (white-green) with 22K resistor.
  • if the pre-standard CP-79x0 is connected using the PoE adapter hack, the Netgear GS110TP doesn't power, when you unplug it, it will enable power within 5 seconds; plug in, and the phone boots.
  • if you configure the administrative VLAN, the phone will fetch a DHCP lease on that VLAN, allowing you to seperately set up dnsmasq on a Raspberry Pi


inventory

  • Fritz!Boxes
7270 (ADSL2+, 1×USB 2.0, a/b, S0 [FXO], 2×FXS, S0-bus, n×DECT, 4×100Mbit, 2.4GHz or 5GHz, 64MB RAM)
7340 (ADSL2+, VDSL, 2×USB 2.0, a/b, S0 [FXO], 2×FXS, n×DECT, 2×Gbit, 2.4GHz or 5GHz, 128MB RAM)
7340 (ADSL2+, VDSL, 2×USB 2.0, a/b, S0 [FXO], 2×FXS, S0-bus, n×DECT, 4×100Mbit, 2.4GHz and 5GHz, 512MB RAM)
  • DECT phones
2×Siemens AL28H
2×Siemens A420 (PsychiC has one)
2×Philips CD6552B
2×Philips CD1302S
1×Philips DECT1221S
1×Profoon PDX2900
+ what's not yet inventoried at the space


log and ideas

A list of ideas to consider:

  • modular 3D insert for different single board computers
  • extra network outlet (since a single one is more or less useless)
  • float or CC/CV charger, MPPT solar charger
  • external antenna mount
  • temperature monitor

Here is a log/some steps to reproduce:

get the basics

apt-get install vlan dnsmasq make curl


create and install FreeSWITCH

see https://freeswitch.org/confluence/display/FREESWITCH/Debian#Debian-BuildingFromSource

cd /usr/src
curl https://freeswitch.org/stash/projects/FS/repos/freeswitch/browse/build/Makefile.centos6?raw > Makefile

If you want to compile and install STABLE branch, edit the above Makefile and add " -b v1.4 " just after the word "clone".

make && make install
  • (you can kill time by doing the other chapters)

create user 'freeswitch', add it to group 'daemon' and change owner and group of the freeswitch installation

cd /usr/local
adduser --disabled-password  --quiet --system --home /usr/local/freeswitch --gecos "FreeSWITCH Voice Platform" --ingroup daemon freeswitch
chown -R freeswitch:daemon /usr/local/freeswitch/
chmod -R ug=rwX,o= /usr/local/freeswitch/
chmod -R u=rwx,g=rx /usr/local/freeswitch/bin/*


prepare VLAN

modprobe 8021q
lsmod | grep 8021q
echo 8021q >> /etc/modules
vconfig set_name_type DEV_PLUS_VID_NO_PAD


set-up network and VLAN

vi /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0

# dhcp configuration, used in normal operation (this connects to your internet)
iface eth0 inet dhcp

# static ip configuration, used for stand-alone preconfiguring factory-reset phones
#iface eth0 inet static
#	address 192.168.6.1
#	netmask 255.255.255.0
#	gateway 192.168.6.1

# operational VLAN 11 (pick any), for usage with VoIP
auto eth0.11
iface eth0.11 inet static
    address 192.168.11.1
    netmask 255.255.255.0
    vlan-raw-device eth0


dnsmasq

vi /etc/dnsmasq.conf
# uncomment to enable dhcp server on eth0, used for stand-alone preconfiguring factory-reset phones
#interface=eth0
# operational VLAN 11 (pick any), for usage with VoIP
interface=eth0.11

# Choose different ranges for each (V)LAN
dhcp-range=eth0,192.168.6.50,192.168.6.150,12h
dhcp-range=eth0.11,192.168.11.50,192.168.11.150,12h

# Most likeley not needed
#option:tftp-server
#dhcp-option=66,192.168.6.1
#option:
#dhcp-option=150,192.168.178.16

# Enable dnsmasq's built-in TFTP server to serve config files
enable-tftp

# Set the root directory for files available via FTP.
tftp-root=/srv/tftp

Create the /srv/tftp directory and put the configs and firmwares in it. Here is a config generator you can put in there (sorry, can't provide the firmwares since "I don't have them").

service dnsmasq restart

or

/etc/init.d/dnsmasq restart

toggleconfig script

#!/bin/bash

restart_services()
{
  trap -- SIGHUP SIGINT SIGTERM

  service dnsmasq stop > /dev/null
  #nohup sh -c "invoke-rc.d networking stop; sleep 2; invoke-rc.d networking start"
  invoke-rc.d networking stop > /dev/null
  sleep 2
  invoke-rc.d networking start > /dev/null
  service dnsmasq start > /dev/null

  trap clean_up SIGHUP SIGINT SIGTERM
}

clean_up()
{
  # reset gpio pin and led
  echo "11" > /sys/class/gpio/unexport
  echo 0 > /sys/class/leds/led0/brightness
  echo none > /sys/class/leds/led0/trigger

  echo done
  exit
}

if [ ! -f /etc/dnsmasq.conf.regular ]; then echo "/etc/dnsmasq.conf.regular does not exist"; exit; fi
if [ ! -f /etc/dnsmasq.conf.config ]; then echo "/etc/dnsmasq.conf.config does not exist"; exit; fi
if [ ! -f /etc/network/interfaces.regular ]; then echo "/etc/network/interfaces.regular does not exist"; exit; fi
if [ ! -f /etc/network/interfaces.config ]; then echo "/etc/network/interfaces.config does not exist"; exit; fi

trap clean_up SIGHUP SIGINT SIGTERM

echo "11" > /sys/class/gpio/export
echo "in" > /sys/class/gpio/gpio11/direction

while true; do

  echo "regular mode"
  echo none > /sys/class/leds/led0/trigger

  # regular config files
  cp /etc/dnsmasq.conf.regular /etc/dnsmasq.conf
  cp /etc/network/interfaces.regular /etc/network/interfaces

  restart_services

  while [ `cat /sys/class/gpio/gpio11/value` -gt 0 ]; do
    echo 1 > /sys/class/leds/led0/brightness
    sleep 0.05
    echo 0 > /sys/class/leds/led0/brightness
    sleep 3
  done

  echo "config mode"
  echo "heartbeat" > /sys/class/leds/led0/trigger

  # regular config files
  cp /etc/dnsmasq.conf.config /etc/dnsmasq.conf
  cp /etc/network/interfaces.config /etc/network/interfaces

  restart_services

  while [ `cat /sys/class/gpio/gpio11/value` -le 0 ]; do sleep 3; done

done

preconfigure phone

  • Connect the phone directly using a (optionally crosslink) ethernet cable.
  • Power the phone, and hold # until the red (mute) light is off and the phone states: "Reset sequence detected"
  • type 123456789*0#, and when asked to keep network config, choose 2=no
  • once the new firmware is loaded (Freeswitch is not running, so it won't connect), press 'settings' (checkbox button at the bottom right)
  • go to Admin. VLAN ID
  • type **# to unlock the setting, and press 'edit'
  • type in your voice VLAN (11 like the configs say)
  • press validate, and save
  • dnsmasq and interfaces configs can now be restored (no dhcp on eth0, only eth0.11)
  • nohup sh -c "invoke-rc.d networking stop; sleep 2; invoke-rc.d networking start"

todo

  • work out 'modus operandi': multiple config files switchable by phone
  • work on dual linux config with GPIO hardware switch
  • test the fibre ports
  • add homeplug as a proof of concept
  • design and create (or buy) small-sized float charger (13.8V 2A) with overcurrent protection, if needed

links

Some random links: