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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.

Connect Starface to Famulor

This guide shows how to connect your Starface phone system to Famulor using a SIP trunk. Your AI assistant answers inbound calls; transfers from Famulor must use SIP to avoid call loops.
The Starface line may show as “not registered” — that is expected for IP/host-based SIP to Famulor and is not an error.

Prerequisites

  • Starface system with admin access to Configuration → Lines (Leitungen)
  • Famulor account
  • A free phone number not already used elsewhere in Starface
  • Your Famulor SIP address from the dashboard

Step 1: Create a line in Starface

1.1 Add a new line

  1. In Starface, open Configuration → Lines (Leitungen).
  2. Open the Leitungen tab.
  3. Click + Neue Leitung (New line) at the bottom left.
Starface configuration: Lines tab and New line button for Famulor SIP trunk

1.2 Find your Famulor SIP address

Use this address for host and fromdomain in Starface:
  1. Open app.famulor.de/phone-numbers.
  2. Click + Integrate SIP trunk (or open SIP integration on an existing number).
  3. Under Inbound settings, copy Our SIP address (for Germany/Europe, usually the France, Germany, Zurich region).
Famulor phone numbers: Our SIP address under inbound settings for Starface host and fromdomain
In Starface, enter only the hostname (e.g. yourproject.eu.sip.livekit.cloud) — without a sip: prefix.

1.3 Configure the SIP provider in Starface

  1. Select the new line and open the Provider sub-tab.
  2. Under SIP configuration, set:
FieldValue
hostOur SIP address copied from Famulor
fromdomainSame value as host
transporttcp
natYes (recommended; see Troubleshooting)
Starface edit provider: host, fromdomain, and transport tcp for Famulor SIP
Status “not registered” is normal. Famulor does not use SIP REGISTER for this setup — connectivity is host/IP-based.

1.4 Add a phone number to the line

  1. Stay on the line and open the Rufnummern (Phone numbers) sub-tab.
  2. Add the number as Einzelrufnummer (single number) with country code 49 and the correct area code and subscriber number.
  3. The number must not already be in use on another line or service.
Starface line phone numbers tab: add single number for Famulor SIP trunk

1.5 Enable CLIP No Screening

  1. In line settings ( Leitungen tab, line selected), enable CLIP No Screening.
  2. Note the line prefix (e.g. **2* or **3*) — you need it for time-based forwarding.
Starface line prefix and CLIP No Screening enabled for Famulor
Save the line prefix: Forwarding uses the format **<line-digit>*<phone-number> (example: **2*004915112345678).

Step 2: Create the number in Famulor

  1. Open app.famulor.de/phone-numbers.
  2. Click + Integrate SIP trunk.
  3. Enter the same phone number you configured on the Starface line (E.164, e.g. +4915112345678).
  4. SIP address / termination: only required if Famulor should place outbound calls via Starface; otherwise leave blank for inbound-only setups.
  5. Save the number and copy Our SIP address if needed for Starface routing.

Use SIP for transfers only

Do not use PSTN forwarding from the assistant: Regular call forwarding over the public phone network can create a loop with Starface. Configure all assistant transfers as SIP transfer.
  1. Open the assistant → ToolsCall transfer.
  2. Enable (Advanced) Is custom SIP transfer?
  3. Under Custom SIP transfer, enter the destination (e.g. tel:… or Starface format **<line-digit>*<phone-number>).
  4. Set When to transfer to define when the handoff happens (e.g. when the caller asks for a human).
Famulor call transfer: custom SIP transfer enabled with destination and transfer condition for Starface
More detail: SIP troubleshooting – call transfer.

Step 3: Assign a Starface user

Starface cannot use the SIP number for calls and rules until it is assigned to a user.
  1. Go to Configuration → Users (Benutzer) and select the user.
  2. Open the Rufnummern (Phone numbers) tab.
  3. Assign the external SIP number from the line (e.g. rule Normaler Anruf / normal call).
Starface user phone numbers: assign SIP number for Famulor

Step 4: Set up time-based forwarding

Configure routing (e.g. Modules → Zeitgesteuerte Umleitung / time-based forwarding) to send calls to Famulor.
  1. Called number: the Starface number that should reach Famulor.
  2. Destination type: Rufnummer (phone number).
  3. Number in this exact format: **<line-digit>*<phone-number>
    Example with prefix **2* and number 004915112345678:
    **2*004915112345678
  4. Set time windows as needed (e.g. Mon–Fri 07:00–16:00).
Starface time-based forwarding: destination number with line prefix asterisk format
Digits after * use the international dial string without + (00 + country code + number). The prefix comes from step 1.5.

Step 5: Assign an assistant and test

  1. In Famulor, open Assistants and edit the desired assistant.
  2. Select the correct inbound type and the imported phone number.
  3. Save assistant and place a test call.

Troubleshooting: No audio / NAT

Symptom: One-way audio or silence on Starface Cloud or with the assistant. Fix: Enable NAT in Starface so RTP (audio) reaches the correct endpoint.
  1. Open Server configuration → Network.
  2. Under SIP settings, set Behind NAT? to yes.
  3. Verify external address or use Enter IP if auto-detection fails.
  4. On the line (Provider), set nat to Yes.
Starface server network settings: Behind NAT yes for Famulor audio
More SIP help: SIP integration troubleshooting.

Help

Starface configuration: Starface support.
Famulor: support@famulor.io or SIP integration overview.