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shiny ACKspace logo, without blocks

Upcoming events

Welcome to ACKspace; a hackerspace located in Heerlen, The Netherlands.

A hackerspace is a place where people get together, socialize, share knowledge, tinker and build stuff.

In order to make this possible we have a collection of tools, (useful) stuff, work area and a lounge where we can relax and discuss our favorite games.

Become a participant

Featured articles:

Event: Main Page
Featured: Yes
State: Planned
Start date: 2017/06/24
Start time: 12:00
End date: 2017/06/24
End time: 17:30
Contact: Xopr
Kind: Party
Location: ACKspace
Fee: T.B.D. (normally between €5,- and €10,-
Short description: omnomnom

Ter ere van het bestuurswerk dat Vicarious (van vóór 4 September 2010) en Da Syntax (vanaf 13 Oktober 2012) jarenlang hebben gedaan is er een barbecue georganiseerd als feestelijke afsluiting en bedankje voor deze twee heren.

Hint: add yourself by typing:

* ~~~

previous barbecues

This is most likely not a complete list of barbecues


september 3rd 2016

"Nieuwe BBQ inplannen, de HOAB bbq was plan technisch err... Poging 2!"

3 September willen we een BBQ houden! Zie ook de Meeting September 2016 die eraan vooraf gaat

Bestuur heeft besloten deze barbecue gratis te maken!


  • aes256cbc
  • AmazingMike
  • Cloud
  • CoolePascal+1
  • Computer1up
  • d010b
  • Jetse (misschien)
  • PsychiC
  • Prodigity
  • Vicarious
  • xopr
  • Da Syntax

may 15th 2016

'Hackers on a Barbecue', as part of a bicycle ride that got postponed. Thanks Wolkje and Prodigity for organizing while the cycle crew was AWOL!

In short: cycling->energy burning->hunger->barbecue. All participants (also the ones which don't own a bike) are welcome.


april 25th 2015

See ACKspace 3.0 opening party.


march 29th and 30th 2014

As part of project NACKspace, extra dinner and breakfast barbecue.

march 22nd 2014

As part of project NACKspace, we made an ATX guerilla barbecue, because we packed the real one.


june 8th 2013

May the Fourth (be with you)

On this day we had a barbecue and unveiling the flag event. Since this day is WWII Remembrance Day, we've put the flag half-mast.

february 2nd 2013

One of the very few winter barbecues!

Sneeuw en honger, dus bbq.... =) Vandaag eerste BBQ van het jaar. NULL graden dus perfect weer voor de eerste BBQ!


  1. rawplayer Vleesch! => Betaald!
  2. Danny Witberg Meet het meat ! => Betaald!
  3. Eagle00789 Something with animal products => Betaald!
  5. Vicarious Vleesnomz => Betaald!
  6. xopr Vleeeeesch met vleesch met vleeschsaus => Betaald!
  7. Prodigity Meer vleesch !!! => Betaald!
  8. Da_Syntax Enorm veel vleesch => Betaald!
  9. mario Enorm veel vleesch => Betaald!
  10. randy Enorm veel vleesch
  11. ruben Enorm veel vleesch => Betaald!


october 19th 2012

Zon en honger, dus bbq.... =) Morgen laatste BBQ van het jaar. 23 graden dus perfect weer voor de laatste BBQ


  1. Eagle00789 : It's over 9000 MEAT !!!!
  2. Danny Witberg Vlees!
  3. PsychiC Het begint met V en eindigt op erschrikkelijk verdomd verdraaid verrekkes veel vlees !!!
  4. Vicarious bacon! met als salade bacon en als saus bacon!
  5. Da Syntax een lekker gezonde salade. UUUHHHM just kidding. VLLEEEEEESSSSS
  6. Xopr fleisch

september 8th 2012

Zon en honger, dus bbq.... =)


  3. Danny Witberg : Fris boeket van vlees met een vleugje MEAT !
  4. Eagle00789 : It's over 9000 MEAT !!!!

july 21st 2012

Zon en honger, dus bbq.... =)


  3. Danny_W
  4. Vicarious
  5. Prodigity
  6. Xopr

july 14th 2012

User:Eagle00789's Birthday BBQ: On July 17th, i am getting another year on my age. (I'm getting to old for this shit) Because of this tragedy, i am holding a wake with an awesome BBQ. Just tell me if you want to join by adding your name to the list below.

Thanks and hope you are not feeling to tragic to come to this wake!


  1. Eagle00789 (JA)
  2. Danny Witberg (JA)
  3. Vicarious (JA)
  4. Xopr (JA)
  5. Da_Syntax (JA)
  6. Prodigity (JA)
  7. PsychiC Da Fuck, ik stond er niet bij en ik neem de gasfles mee =) (JA)
  8. aes256cbc (JA)
  9. Tjorn (JA)

Review: Het was een leuke BBQ. Zelfs de brandweer was op mijn verjaardags BBQ aanwezig! :P

july 7th 2012

Zon en honger, dus bbq.... =)


  2. Vicarious: OMNOMNOM
  3. Danny Witberg Vlees met vlees erbij !
  4. Da Syntax VLEES, VLEES, VLEES (repeat)

june 30th 2012

Jaja ,het wordt zaterdag EPISCH lekker weer, dus is het tijd voor EPISCH lekker vretûh...

Zaterdagmiddag wordt er muk gehaald , dus aub voor zaterdag 12:00 vermelden dat je komt per wiki of mail (info@) . De kosten zullen zon 8 euro p.p. bedragen incl. vlees, sausjes, brood en wat restmeuk. Mocht het je niet lukken om voor zaterdag 12:00 te reageren maar wil je meedoen, neem dan zelf wat mee =)

Ow en alvast voor de 14e : Birthday_BBQ

  2. Eagle00789: 0xF00D (0xFEEDBEEF)
  3. Danny Witberg : Altijd lekkah ! Vlees met vlees erbij !
  5. Xopr "What does baby wanna drink?" -"MEAT!!"
  6. Prodigity "My favorite animal is steak"

june 2nd 2012

Ff snel voor de bbq van a.s. zaterdag 2 juni. Hophop

Omdat het er toch wel eens tijd voor wordt is besloten om een bbq aan te schaffen. A.s. zaterdag wil ik deze gaan halen en dan moet ie uiteraard "getest" worden =) Het zou droog blijven met een graadje of 17C, dus moet te doen zijn. Voor degenen die mee willen doen is er een wiki page Zaterdagmiddag wordt er muk gehaald , dus aub voor zaterdag 12:00 vermelden. De kosten zullen zon 8 euro p.p. bedragen incl. vlees, sausjes, brood en wat restmeuk. Mocht het je niet lukken om voor zaterdag 12:00 te reageren maar wil je meedoen, neem dan zelf wat mee =)

  1. Danny Witberg -> Count me in! Veel vleeeeeeeeees! Vlees, vlees en wat vlees erbij.
  2. Eagle00789
  3. Tjorn
  4. xopr
  5. PsychiC
  6. Vicarious
  7. Prodigity


april 4th 2011

First (semi) barbecue! Official opening party:

Location (of the Barbecue itself): stACKspace
Event: Main Page
Featured: Yes
State: Planned
Start date: 2017/06/24
Start time: 18:00
End date: 2017/06/24
End time: 19:00
Contact: xopr
Kind: Meeting
Location: ACKspace
Fee: pay your own pizza
Short description:

Datum vergadering tijdelijk aangepast
Vanwege het festivalseizoen is de komende vergadering is een week naar voren geschoven, namelijk zaterdag 24 juni om 18:00u. Voorafgaand is er ook een barbecue geplanned!

Vanaf heden is er elke 1e zaterdag van het kwartaal een deelnemersvergadering: de pizza-meet!

Deelnemers kunnen van te voren1 hun stukken inzenden naar Xopr (secretaris) of via de discussion page en via het bekende info emailadres.

1)met van te voren wordt bedoeld, het liefst een dag (of meer) van te voren.

De eerstvolgende meeting is op Saturday, 1 July 2017 Zaterdag 24 juni!

(voorlopige) agenda

  1. Opening en vaststelling agenda
  2. Vaststelling vorige notulen en actiepunten
  3. Mededelingen en ingekomen stukken
  4. T.B.D (stuur je stukken in!)
  5. Rondvraag
  6. Sluiting


Vorige vergadering — Laatst genoemde vergadering(en)
Telephone System

Project: Main Page
Featured: Yes
State Active
Members xopr
GitHub No GitHub project defined. Add your project here.
Description Telephone Communication System
Cisco 7940.jpg


Create and/or implement a telephone communication system for fun and automation. It can provide conference and congress rooms, quickly notify if the space is closed and provide a quick and cheap way of communication.

xopr 5 April 2017: I'm working on a new system to replace the current virtual machine

VoIP system with its involved servers

new system

The current system is lacking functionality and needs revisioning. Currently, the trunks that register with the extensions, don't work. When they do, participants registered to the (public) VoIP system are able to directly dial an internal space extension.

The current VoIP setup consists essentially of three servers ('nodes')

  • NLnode (primary public system,
  • DEnode (fallback public system,
  • SpaceNode (internal system handling IVR and internal extensions)

The public servers are tied with SRV records as a semi-high availability setup with the primary service having high priority and weight (10 20), while the backup server has it the other way around. All (correctly implemented) services connect to the servers in the given order.

Note that currently, it is not yet possible for an extension on the primary server to call another extension on the fallback server. xopr has seen it happen that a third-party Fritz!Box falls back to the secondary server and never reconnects to the primary server without editing the credentials and reapplying the registration.

This is the SRV output:

$ dig -t srv

; <<>> DiG 9.10.3-P4-Ubuntu <<>> -t srv
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 783
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0


;; ANSWER SECTION:	384	IN	SRV	10 20 5060	384	IN	SRV	20 10 5060

;; Query time: 8 msec
;; WHEN: Wed May 03 20:15:15 CEST 2017
;; MSG SIZE  rcvd: 110

All nodes connect to the BudgetPhone PSTN trunk for incoming calls, both public nodes connect to CheapConnect for the conference (and backup) number, to VoipBuster for outgoing calls and to Speakup for Limesco cell phone services. The SpaceNode connects to VoipBuster for an alternative PSTN trunk and landline services and to InterVoip for cell phone services.

When a call comes in, both public nodes try to route the call within 3 seconds: they try to call the SpaceNode user/trunk. When this fails, they try to call each other in case one of the nodes wasn't connected to BudgetPhone. If this fails, a tape will be played after 10 seconds stating that "currently, we're not reachable", whereafter the user will be placed in the (public) conference room.

If both public nodes weren't connected to BudgetPhone, the SpaceNode will answer within 10 seconds with the IVR.

current status

  • SpacePhone ENUM number
  • Dutch language for IVR
  • spacestate information logic
  • Every room has its own phone
  • possible to dial sip addresses (info, conf, [username])


  • Create new (vanilla) VM on new server
  • update/extend IVR menu
    • mention the space state before actually answering (183:progress)
    • start with a brief menu, but give more info on demand
  • add support for Cisco 7900 phones (Cisco phone deployment)
    • need to put an interface on a different VLAN
    • update all switches to offer the same VLAN
    • add TFTP and add the firmware + configs
    • update the DHCP (option 66 or 150)
    • update dialstring to both signal SCCP and SIP
  • update public SIP addressing (dedicated public IP or a VPS redirect)


  • multilingual IVR
  • enable fax/modem detect
  • enable 2600 toying option
  • key people (1333)
  • Add a HAM autopatch system to the telephony system so sip phones and amateur radio are interconnected
  • simple intercom service
  • number lookup script
  • various participant registrations (see #extensions)
  • some scripting to ease life and add some nifty features
  • trunking over VPN
  • install PoE blade or smaller PoE switch (might want to choose for regular power supplies)


This is the list of registered extensions. If you want to register your own extension, let Xopr know. For available extensions, refer to the #dialplan

(refresh table)

Reserved extension numbers
1,333Key people


The current dialplan expectation is defined as followed:

used numbers

dialplan destination
(\+|00)([1-9]\d+) international
0[1-9]\d+ long distance
100 ring all onsite (ACKspace) extensions
10[1-9] onsite (ACKspace) extensions
112 European harmonized (emergency)1
116\d{3} European harmonized (social interest)1
1200 ACKspace portal (external IVR)
1201 alternate IVR (events)
1233 mailbox1
1244 prepaid calling credits2
130[1-9] listen-in event conference rooms 1-9
1331 conference rooms
1333 Key people (cell forward)1
1334, echo echo test
1335 delayed echo test
1357 local server identification
1377 remote server identification
139[1-9] party-line event conference rooms 1-9
140\d\d+ government services1
150 ring all offsite extensions
15[1-9] offsite extensions
16\d\d carrier select1
170\d+ reserved for future (expanding) purposes
17[1-9] participants extensions
18\d\d subscriber information service
19\d participants extensions
[2-8]\d{6} local numbers (Heerlen, 045)
9\d\d SpacePhone (interhackerspace enum extensions)
1) currently not in use
2) not available due to IP restrictions

To do: (valet) park, call intercept, call return, redial, paging

Interactive Voice Response

The concept for the new IVR menu will have something like this:

ack_main and ack_info (are the same, but with different spoken texts)

  • 1[059]\d: direct dial extensions
  • 2 switch to English language
  • 3 switch to Dutch language
  • 5 direct dial ring group
  • 6 dial key persons, enable voicemail detect and use time schedule
  • 7 go to conference rooms
  • 8 go to menu ack_extra
  • 9 go to menu ack_info
  • 0 go to menu ack_directory


  • 1 more info on space state (time of toggle)
  • 2 speak out telephone number and/or IP address
  • 3 listening rooms
  • 4 extended time service
  • 5 contact location abroad (when online)
  • 6 echo test
  • 8 call test setup
  • 9 repeat this menu
  • 0 go back
  • * go to main menu


  • 100 for slACKspace (lounge)
  • 101 for hACKspace (workshop)
  • 109 for DECT (wireless)
  •  ??? for chairman
  •  ??? for secretary
  •  ??? for treasurer
  • 1(all other public extensions)
  • 5 call anyone
  • 8 lookup by typing first three characters using keypad
  • 9 repeat this menu
  • 0 go back
  • * go to main menu


Chaos Communication Camp 2011

The CCC Binary Voice Radio telephony server was a mixed success. Actually, it was a disaster:

  • The visual ring indicator circuit didn't trigger the optocouplers so that was the first thing to fail.
  • a lot of power failures which caused a lot of downtime and eventually database corruption
  • the DECT system was getting too complex for the simple phones we've modded for field reporting (Technical clarification came from one of the Eventphone key people who explained that the antenna register on cheap phones was too small to identify them all). Besides that, it looked like the cabling had short-circuited because the 9v battery didn't have any oomph left to generate amplified audio.
  • wifi had a hard time maintaining the links and coverage wasn't 100% so the wifi field reporter wasn't a good alternative
  • last but not least: the public IP addressing threw a spanner in the works and the server went limbo.

The server's database went corrupt, and after a restore, it didn't match the regular config files. I got it semi-working after it was far too late to make it useful to the studio. Also, after I got it to work, it wouldn't register correctly to the Eventphone trunk and we only got to call the editorial room (2781|BVR1) via DECT twice or so. Despite all that stress, it was promising, so better luck next time.

Open door day 2011

For the open door day, I set up a stand-alone test system with two Cisco 7940s, a FxS/FxO and dual FxS ATA, which included some softclients.

The phones were successful in a rough field test on the open door day, connected to a FreeSWITCH exchange and two ATAs which provided connections to two additional analog handsets. The field test proved reliable enough and a great platform for some hilarious phone pranks.

The Cisco phones had a menu where you could view a 2 bit grayscale snapshot of the two space cams, and you were able to switch some outlets. People were allowed to navigate the configs and exploit functionality and LuckY sniffed and replayed audio over a wifi link.

Other events

connecting various devices to ACKspace VoIP

connecting the Fritz!Box

  • Note that the Fritz!Box is pretty quirky regarding SIP: it can't handle a 407-unauthorized correctly when in router mode (which is needed to differentiate between public and internal calls). xopr had more success setting the device as a flat switch and putting it behind a generic router (tested with a ZyXel).
  • It also doesn't like usernames; you have to start with a number and change it afterwards.
  • It does seem to have more ring power than the tested ZyXel, though.

connecting the Linksys PAP2T

The following settiings are needed:

  • TBD

connecting the N510 IP PRO

Under Settings » Telephony » Connection, the following settings are needed:

  • Connection name or number: <anything>
  • Provider: Other provider
  • Authentication name: <username>
  • Authentication password: <password>
  • Username: <username>
  • Display name: <anything>
  • Lookup Enabled (if available, version ≥ 240): yes
  • Domain:
  • Registration server: <leave empty>
  • Proxy server address: <leave empty>
  • Proxy server port: <leave empty to trigger SRV lookup>
  • Registration server: <leave empty>
  • Registration server port: <leave empty to trigger SRV lookup>
  • Registration refresh time: 110
  • STUN enabled: Yes
  • STUN server address:
  • STUN server port: 3478
  • STUN refresh time: 240
  • Outbound proxy mode: Automatic
  • Outbound proxy port: <leave empty to trigger SRV lookup>
  • Select network protocol: Automatic
Note that these settings take a while for the Gigaset to connecto to the right server.
Also, make sure that under Settings » Telephony » Advanced VoIP settings, SIP port: (or its random range) does not conflict with other SIP devices behind the same NAT.

connecting the Sipura SPA3000

Under Admin Login » Advanced » Line 1, the following settings are needed:

  • SIP Port: <make sure this port does not conflict with other SIP devices behind the same NAT>
  • Proxy:
  • Register Expires: 110
  • Use DNS SRV: yes1
  • DNS SRV Auto Prefix: yes1
  • Display Name: <anything>
  • User ID: <username>
  • Password: <password>
  • Dial Plan: (1[01579]xS0|1[23]xxS0|5000S0|2xxS0|00x.|0[1234567]xxxxxxxxS0|088xxxxxxxS0|0800xxxx.|090[069]xxxx.)

1) or use: Use Outbound Proxy: yes and Outbound Proxy:

connecting the Thomson ST2030

Under SETUP » VoIP Service » Basic Setup, the following settings are needed:

  • Profile Name: <anything>
  • SIP Unregister: unchecked
  • URI Type: SIP
  • SIP Transport: UDP
  • Connect Reuse: checked
  • Service Domain:
  • Registrar Server Address:
  • Port: 5060
  • Proxy Server Address:
  • Port: 5060
  • SIP Local Port: <make sure this port does not conflict with other SIP devices behind the same NAT>
  • TLS Local Port: <make sure this port does not conflict with other SIP devices behind the same NAT>
  • Registration Timer: 110
  • Registration Frequency: 110

Under ADVANCED » Networking » Outbound Proxy, check the following setting:

  • Outbound Proxy Flag: disabled

Under ADVANCED » Voice Settings » Codec Setup, set all codec settings to:

  • Fixed
For the dial plan go to ADVANCED » Voice Settings » Advanced, VoIP Dial Plan: |1[01579]x|1[23]xx|5000|2xx|00x.T|0[1234567]xxxxxxxx|088xxxxxxx|0800xxxx.T|090[069]xxxx.T|

Het schoonmaakbord was opgezet met het idee om (een deel van) de space soepel draaiende te houden.

Waarom niet meteen dat concept doortrekken naar alles wat bijdraagt aan een betere space? Boodschappen gedaan? Handig space project opgezet? Aan infra gewerkt? .. ? Vinkje erbij! Mensen verdienen erkenning voor hun bijdrages! Go team go! :P

De volgende zaken dragen bij aan een schone space en aan je collectie vinkjes (deze moet nog verder uitgeschreven worden):

  • Stofzuigen
  • Afwassen
  • Ramen schoonmaken
  • Boodschappen gedaan
  • Handig spaceproject opgezet
  • Aan infra gewerkt
  • ...

Visiting address:
Kloosterweg 1
6412 CN Heerlen
Mail: see the communication page

(refresh table)