====== EPVPN ======

EPVPN is EVENTPHONE’s permanent, experimental phone network. Think of it as a long-running event where you can stay in touch under your pseudonym between events.

The new EPVPN has been in production since 17 October 2026. The public beta has ended, existing accounts have been migrated, and the old system has been shut down. The platform formerly known as EPVPN Beta is now EPVPN. [[https://eventphone.de/blog/2026/11/07/epvpn-ist-umgestellt/|Read the switchover announcement (DE/EN)]].

EPVPN supports SIP extensions and features such as call groups, announcements, custom ringback tones and call forwarding within EPVPN. There is no PSTN dial-out.

Call forwarding between EPVPN and temporary events is currently unavailable in both directions.

{{ :wiki:logo_epvpn_b-200px.png?200|EPVPN Logo}}
===== Quickstart =====

  - [[https://guru3.eventphone.de/accounts/login/|Log in]] with your EVENTPHONE account or [[https://guru3.eventphone.de/register|register]] for one.
  - Select **EPVPN** in the upper left corner, then open **My Extensions**. Use an existing extension or choose **Add Extension for EPVPN**. Please register only extensions you actively use.
  - Configure your [[https://en.wikipedia.org/wiki/List_of_SIP_software|SIP client]] as described below.

===== Dialin =====

  * **PSTN dial-in:** ''+49 221 59619 XXXX''
  * **VoIP dial-in:** ''sip:XXXX@hg.eventphone.de'' (dual stack)
    * IPv4-only: ''sip:XXXX@hg4.eventphone.de''
    * IPv6-only: ''sip:XXXX@hg6.eventphone.de''

Replace ''XXXX'' with the EPVPN extension you want to call.
{{ :epvpn_color_1000x739.png?nolink&200|EPVPN Logo}}
===== Configuration =====

==== SIP user ====

  * **SIP proxy:** ''hg.eventphone.de'' (dual stack), ''hg4.eventphone.de'' (IPv4-only) or ''hg6.eventphone.de'' (IPv6-only).
  * **SIP username:** Your extension number, for example ''1234''.
  * **SIP password:** In GURU3, open **My Extensions** and click the key icon next to your EPVPN extension.
  * **SIP port:** ''5060'' for UDP or ''5061'' for TCP/TLS.
  * **RTP ports:** Dynamically assigned between ''10000'' and ''20000''.
  * **Behind NAT?** Configure your SIP client to send keep-alive packets about once a minute.
    * **FRITZ!Box:** Telephony → Telephone Numbers → Line Settings → Keep port sharing of the internet router enabled for telephony.
{{ :wiki:vp6500boot.jpg?200|The VP6500 booting}}
===== Events =====

EPVPN has its own dial plan. The numbering and routing rules differ from those at temporary EVENTPHONE events.

  * **From EPVPN to a temporary event:** While the event is running, dial ''09'' followed by the event extension.
  * **From a temporary event to EPVPN:** Dial ''01999'' followed by the EPVPN extension.

===== Dialplan Considerations =====

  * **0...** → prefixes and routing
  * **0310** → network announcement
  * **1xxx** → reserved for hackerspaces. Contact us if you need a number in this range.
    * **16xx** → reserved for VOC
  * **20xx** → reserved for PoC
  * **2100–7999** → user extensions
  * **8xxx** → IVRs, scripts, announcements and automated responses
  * **9xxx** → prefixes and routing

===== PSTN Dialplan integration (Germany) =====

You can configure ''01999'' as a local prefix for EVENTPHONE on devices that route calls to different VoIP providers based on the dialled prefix, such as a FRITZ!Box. EPVPN strips the prefix before routing the call. For example, ''01999-0310'' is routed to ''0310'', the EPVPN network announcement.

The German numbering plan designates the **(0)199** range for internal network routing. See section 3(g) of the [[https://www.bundesnetzagentur.de/DE/Fachthemen/Telekommunikation/Nummerierung/Verkehrslenkungsnummern/NummernplanVerkehrslenkungsnrn.pdf?__blob=publicationFile&v=1#page=7|Bundesnetzagentur numbering plan for traffic routing numbers]].

See also the [[https://guru3.eventphone.de/event.wasm/phonebook|online EPVPN phonebook]]. If GURU3 shows another event’s phonebook, select **EPVPN** in the event picker.

===== Phonebook via LDAP / CardDAV =====

  * [[ldap_phonebook|LDAP]]
  * [[carddav_phonebook|CardDAV]]

===== Account cleanup =====

We regularly delete accounts whose registered email addresses can’t receive mail and release extensions that haven’t been used for more than a year.

Please check that you can receive mail at the address registered in GURU3 and release any extensions you no longer need.

===== EPDDI =====

[[epddi|EPDDI]] is available only at temporary events. EPVPN does not offer EPDDI.

Offering EPDDI on EPVPN would require us to purchase a license we do not currently hold, build a multi-OMM setup, and operate and maintain a permanent SIP-DECT installation. We’ve decided against taking on the licensing costs and ongoing maintenance.

===== FAQ and Troubleshooting =====

  * If your SIP client fails to register, check the server and the credentials for your **EPVPN** extension in GURU3.
  * To test your connection, dial ''0310'' for the EPVPN network announcement.
  * If you need help, contact [[https://guru3.eventphone.de/support/|GURU3 support]].

===== Timeline =====

  * 2009-12-04: First successful test call.
  * 2009-12-18: First successful NAT-to-NAT test call.
  * 2009-12-18: Start of public testing.
  * 2009-12-27 to 2009-12-30: Extensive testing at 26C3.
  * 2010-02-01: Public testing ended and the original setup went live.
  * 2012-09-17: Migration to new VoIP server software.
  * 2013-02-05: SIP over TLS and SRTP added on ''hg.eventphone.de'', port ''5061''.
  * 2016-10-14: Operation confirmed.
  * 2019-04-23: Operation confirmed.
  * 2019-10-29: Brief outage during the upgrade from Debian 7 to Debian 10.
  * 2020-06-10: Let’s Encrypt certificates added on port ''5061''.
  * 2025-03-08: First successful test call on the new platform.
  * 2025-04-21: [[epvpn_beta|Public beta]] of the new platform began.
  * 2026-10-17: The new platform entered production as EPVPN. Existing accounts were migrated and the previous system was shut down.