german version

You can find the phone book here: Phonebook HOA2021


At this year's HoA 2021, the telephone network will be kindly provided by Eventphone. To be able to use the telephone network you need a Guru3 account and a registered extension. The following explains how you can create a Guru3 account and register an extension for SIP or DECT.

HowTo Guru3


  • What is Guru3?

Guru3 is Eventphone's online administration tool for self-administration of extensions / phone numbers on $ event and for the configuration of functions such as call diversions, call groups, dial tone tones and more. It also offers the possibility to participate in the EPVPN network, but that is only mentioned in passing. To get a Guru3 account, register with a valid email address and follow the instructions on the form: Guru3 Register Tool

Register extension

  • How do I get a phone number?

Now that you have an account, you can register a phone number (also called an extension). To do this, log into Guru3 with your account and click on “Extensions” in the title bar.

Now you can register an extension. In the “Extension overview” click on “Add Extension for HOA21”

Now you can choose the type of extension (DECT / SIP), a four-digit extension (phone number) and the name of the extension. What the individual fields mean is explained to you under the picture.

  • Type: here you can choose the type of extension. That means whether it is a SIP / VoIP phone in your case or whether you want to register a DECT / cordless phone. This option can be changed afterwards.
  • Extension: Here you can choose the extension (phone number) under which you want to be available at the event. It MUST be a four-digit number! Some numbers are reserved or already taken. Guru3 will report back to you whether the number has already been assigned or falls into a reserved area. Then you have to choose a different number. Should you not be able to decide, Guru can generate a random free phone number or you can look for a phone number from the list of free extensions (the two buttons to the right of the input field). The extension can (if still available) be changed retrospectively.
  • Name: Here you can assign the name of the extension. This means the name under which your phone number appears in the phone and which name is shown in the display of the person called (if the respective device supports it).
  • Location: Here you can indicate where you usually stay at the event. This can be useful if you belong to a specific village. This designation is displayed in the phone book (if you allow this) and enables quick assignment.
  • Announcement Language: Here you can store your preferred language, as some functions of the telephone system support several languages ​​(time announcement, Mate-o-Meter, etc.)
  • Ringback Tone: Here you can specify a ringback tone that the calling person hears while the phone is ringing. The ring tone tones can be uploaded in the top menu under “Audio Files”.
  • Show in Public Phonebook With this option you determine whether your phone number should be displayed in the public phone book.
  • Activate call Waiting: This option enables you to “knock” another person calling, should you already be on the phone. Whether this function is supported depends on your device! (Busy on Busy)

To complete the registration, click on “Save”, Congratulations! You have successfully registered an extension!

Call forwarding

You can configure your extension so that a calling person is automatically forwarded to another extension (call forwarding). For this you have to determine how the call is to be handled, to which extension it is to be forwarded and with what delay it should take place. Below you will find a brief description of the individual functions.

  • Forward Mode: This menu allows you the type of call forwarding.
  1. No forward: There is no call forwarding.
  2. Active: Calls are forwarded to the specified extension depending on the delay set (Activate forward after).
  3. Forward on busy: Calls are forwarded to the specified secondary unit if your phone is busy. Caution! there is a further dependency with the “Activate Call waiting” function from the previous section.
  4. Forward on unavailable: Call forwarding takes place if your device is not available. This means, for example, outside the range of the DECT network.
  • To extension: Here you can specify the extension to which the call should be forwarded.
  • Activate forward after: Here you can specify the delay in seconds from when the call should be forwarded. 0 = immediately!


  • How do I register my SIP / VoIP phone?

First your device must be connected to the Internet / network, the NOC on site will surely provide you with assistance. :-)

In principle, the registration of an end device is limited to the following three parameters:

  1. Resgistrar / Server
  2. User
  3. Password

To get your login data for the respective extension, go to the overview of your extensions in Guru3. At the end of each extension you will find a small key symbol which reveals the login data to you. The Eventphone Wiki already has a good description (in English) of how you can get your login data: SIP configuration hints

DECT / cordless phone

  • How do I register my DECT / cordless telephone?

Depending on the end device, your device registers with a new base station. Please refer to the instructions on your device to find out how this works in detail. When your device has been successfully registered, you can finally register it in the Eventphone PBX by calling a number that has been individually specified for you. You can find this phone number in Guru3 by clicking on the small key symbol in the extension overview. If you have problems registering your device, contact the POC helpdesk! Note: Depending on the device, your registration will be saved! Your device should automatically log in at the following events, provided you have registered a DECT extension!

  • Which DECT / cordless phones work?

A list of compatible devices is available in the Eventphone Wiki: DECT Phone compatibility list