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Done for you — any region, any country (our EU partner carrier)If you prefer not to configure a SIP trunk or import numbers yourself, our EU partner carrier can supply local numbers in any region and any country, set up the SIP trunk, and import the connection into Famulor for you. Provisioning runs end-to-end through the partner (carrier-side), so you skip DIY trunk and number import in Famulor.

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Connect a Fonial Number to Famulor

This guide walks you through connecting a Fonial phone number to Famulor step by step.
Famulor has no dedicated „Fonial import”. You connect your Fonial number like any other provider through the Integrate SIP trunk feature in Famulor.The full setup has two parts that work together:
  • Outbound calls: a SIP user in Fonial provides the credentials Famulor uses to authenticate to Fonial.
  • Inbound calls: a forwarding to SIP-URI in Fonial sends calls to Famulor’s SIP address.
fonial PLUS customers only: The Voice AI integration can only be used by PLUS customers of Fonial. If you are currently a FREE customer, you need to upgrade your plan to use this feature. Contact Fonial support by phone at 0221 66966966 or by email at support@fonial.de and ask whether the feature is included in your package.

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How it works

  • Inbound: Famulor does not register via SIP REGISTER at Fonial. Incoming calls reach Famulor through the forwarding to SIP-URI (Step 5).
  • Outbound: Famulor authenticates per call with the SIP user credentials at sip.plusnet.de.
The SIP user stays „Offline” in Fonial – this is correct and not an error. Famulor does not register, so the status never switches to „Online”. Incoming calls run through the forwarding, not through registration.

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Prerequisites

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Step 1: Create a SIP user in Fonial

The SIP user provides the credentials for outbound calls.
  1. Sign in to your Fonial customer account.
  2. In the sidebar, open SIP-Benutzer (SIP users).
  3. Click Neuen SIP-Benutzer anlegen (Create new SIP user) at the top right.
Fonial customer account: SIP user overview with the „Neuen SIP-Benutzer anlegen“ button
  1. Enter a name for the SIP user (e.g. Famulor) and click Speichern (Save).
Fonial: „SIP-Benutzer anlegen“ dialog with name field and „Speichern“ button
  1. The new SIP user appears in the list with status Offline. It stays Offline even after setup – see the note above.
Fonial: list of SIP users showing the newly created user with status Offline

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Step 2: Open the SIP user credentials

  1. In the SIP user row, under Aktionen (Actions), click the credentials icon.
Fonial: SIP user list, action icons to open the credentials
  1. Note the displayed Zugangsdaten SIP-Benutzer (SIP user credentials):
Fonial: „Zugangsdaten SIP-Benutzer“ dialog with username, password and Server URL sip.plusnet.de
Keep the username and password safe. You need both in Step 4 for the Famulor SIP trunk setup.

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Step 3: Assign the phone number to the SIP user

  1. In the sidebar, open Rufnummern (Phone numbers).
  2. Tick the checkbox next to the number you want to connect to Famulor.
  3. Click SIP-Benutzer zuordnen (Assign SIP user) at the bottom.
Fonial: phone number overview, number selected and „SIP-Benutzer zuordnen“ button
  1. In the SIP-Benutzer festlegen dialog, select the SIP user you just created (e.g. Famulor) and click Speichern (Save).
Fonial: „SIP-Benutzer festlegen“ dialog with „SIP-Benutzer auswählen“ dropdown and „Speichern“ button
Note your Fonial number in E.164 format with country code, e.g. +498956546546. You need it in the next steps.

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Step 4: Set up the SIP trunk in Famulor

  1. Open Famulor at app.famulor.de/phone-numbers?lang=en.
  2. In the sidebar, go to Your phone numbers.
  3. Click + Integrate SIP trunk at the top right.
  4. Enter the data as follows:
  1. Under Incoming call settings, copy the value Our SIP address (e.g. xxxxxx.eu.sip.livekit.cloud). You need it in Step 5.
  2. Click Add SIP number.
Famulor: „Integrate SIP trunk“ dialog with SIP extension, authentication, SIP address sip.plusnet.de and the „Our SIP address“ field for incoming calls
With this configuration, outbound calls are already covered: Famulor authenticates with username and password at sip.plusnet.de. For inbound calls, set up the forwarding in Fonial in Step 5.

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Step 5: Create the forwarding to SIP-URI in Fonial (inbound calls)

To make incoming calls arrive at Famulor, create your AI phone assistant as a target in Fonial. Fonial then forwards calls to Famulor’s SIP address.

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Build the SIP-URI from „Our SIP address”

Build the SIP-URI from your Fonial number and the Our SIP address value you copied in Step 4:
Example: +498956546546 and xxxxxx.eu.sip.livekit.cloud become:
The phone number in the SIP-URI must be entered without the plus sign (+).

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Create the target in the Fonial customer account

  1. In the navigation menu, under Telefonanlage, select Ziele (Targets).
  2. Click Neues Ziel anlegen (Create new target).
Fonial customer account: Telefonanlage → Ziele with „Neues Ziel anlegen“ button
  1. Choose Weiterleitung (Mobilfunk, Festnetz, Fax oder SIP-URI) as the target type.
  2. Enter a name for the forwarding target (e.g. Famulor).
  3. In the dropdown, select Weiterleitung auf SIP-URI (Forward to SIP-URI).
  4. Under SIP-URI, paste the SIP address you built above.
  5. As the outgoing phone number (Ausgehende Rufnummer), select the Fonial number you want to connect to Famulor.
  6. Finally, click Speichern (Save).
Fonial: „Neues Ziel anlegen“ dialog with type Weiterleitung, „Weiterleitung auf SIP-URI“, SIP-URI field and outgoing phone number

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Step 6: Assign an assistant and test

To have incoming calls answered by your AI assistant, assign the number to an assistant.
  1. Open Assistants in Famulor and edit the assistant you want to use.
  2. Select the correct inbound type (incoming calls).
  3. Choose your connected Fonial phone number from the list.
  4. Click Save assistant.
  5. Place a test call to your Fonial number and check that the AI assistant answers.

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Common issues

This is normal and not an error. Famulor does not register via SIP REGISTER at Fonial, so the SIP user stays „Offline”. Incoming calls run through the forwarding to SIP-URI (Step 5), not through registration.
Check the forwarding to SIP-URI in Fonial (Step 5): SIP-URI in the format sip:<number without +>@<Our SIP address>, the correct outgoing phone number, and the exact „Our SIP address” from Famulor (no second sip:, no spaces).
Check the username, password and SIP address (sip.plusnet.de) from the Fonial credentials (Step 2) in Famulor. Set the Outgoing phone number format to International (with leading +).
Use the exact „Our SIP address” from Famulor (Phone numbers → Integrate SIP trunk → Incoming call settings). The phone number in the SIP-URI must be entered without the plus sign.

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Help

If you need help, contact our support team at support@famulor.io. You can reach Fonial support by phone at 0221 66966966 or by email at support@fonial.de – more info in the Fonial help center.