Knowledgebase

SIP Trunk Setup for Fanvil X7

Setting up your device with Voyced as your Business VoIP Provider.

What You’ll Need

• Fanvil X7 IP phone

• Internet connection

• Power adapter or PoE switch

• Web browser on the same network

• Voyced SIP trunk account details:

  • Account / telephone number: Your-Voyced-DID

  • Service password: YourServicePassword

  • SIP server: sip.voyced.eu

Reset the Phone (Optional but Recommended)

If your phone was used before:

• Hold the OK button for 10 seconds

• Select Reset to factory defaults

• Let the phone reboot fully

Requirements Before You Begin

• Connect the Fanvil X7 to power and internet

• On the phone, go to Menu > Status > Network to find its IP address

• Open that IP in a browser

• Log in with:

  • Username: admin

  • Password: admin (or your custom password)

Security Reminder:

• Go to System > Password

• Change the admin password to something strong

• Use at least 10 characters, include numbers and symbols

• Save and log in again

SIP Trunk Setup Steps

This section connects your Fanvil X7 to Voyced so you can make and receive calls.

 

1. Access SIP settings

• Go to Line > SIP

• Choose Line 1

2. Enter SIP credentials

• Enable Account: Yes

• Display Name: Your-Voyced-DID

• Register Name: Your-Voyced-DID

• User Name: Your-Voyced-DID

• Password: YourServicePassword

3. SIP server settings

Recommended Setup (preferred):

• Host: sip.voyced.eu

• Port: 0

• Transport type: DNS NAPTR

• Protocol: UDP

If your phone does not support DNS NAPTR, try:

• Transport type: DNS SRV

• Port: 5060

If neither works, use the fallback setup:

• SIP Server 1:

  • Host: sip.voyced.eu

  • Port: 5060

• SIP Server 2:

  • Host: sipnl.voyced.eu

  • Port: 5060

• Transport: UDP

4. Registration Settings

• Registration Expiry Time: 60 seconds

5. DNS Settings

• DNS Mode: SRV or NAPTR, if supported

• Fallback: Hostname with port, as above

6. DTMF (for voicemail and menus)

• DTMF Type: RFC2833

• Payload: 101

7. Codec Settings

List in this priority order (from higher quality to lower):

• G722 **

• G723 **

• G726 **

• PCMU (u-law)

• PCMA (a-law)

• G711

• G729

• Opus **

• iLBC **

• AMR-WB **

• AMR **

• GSM

• Any other codecs your device supports

Codecs marked with ** may be supported but aren't guaranteed to work across all global routes.
If you have audio issues, switch back to G711 or G729 and test again.

8. RTP Port Range

• Voyced uses UDP ports 10000–20000 for audio

• Make sure your router or firewall allows this

9. NAT and STUN Settings

• STUN: Disabled

• NAT Traversal: Off or leave as default

• Voyced manages NAT internally

• Do not use any SIP proxy or STUN server

10. Save and Finalise

• Click Apply or Save

• Wait for the phone to register with Voyced

• Go to Line > SIP, and disable all unused lines

Testing Your Setup

Inbound Call Test

• Call Your-Voyced-DID from another number

• The Fanvil X7 should ring

Outbound Call Test

• Call a working number from the Fanvil handset

• Make sure audio works both ways

• Press buttons during a call to test DTMF in voicemail or menu systems

Check that:

• The call connects fast

• You can hear and be heard clearly

• DTMF tones work

• Caller ID is correct

If calls fail, check your balance, concurrency settings, or firewall

Final Tips

• Change the admin password now if you haven’t

• Never access the phone interface from outside your network

• Disable SIP ALG in your router

• Always use UDP, never TCP or TLS unless specifically instructed

• DNS setup must follow: NAPTR > SRV > Host fallback

• No STUN or proxy is needed

• Use VLANs or static IPs for extra network stability

• Keep the firmware updated from Fanvil's official site

• Voyced does not guarantee emergency call routing. Use a mobile or landline for that

Common Troubleshooting

Not registering?

• Check credentials

• Make sure NAPTR or SRV is selected

• Use fallback setup if needed

• UDP 5060 must be open

• SIP ALG must be off

No audio or one-way audio?

• Check RTP ports: UDP 10000–20000

• Make sure STUN is off

• Avoid double NAT setups

DTMF not working?

• Set to RFC2833

• Payload must be 101

Interface won’t load?

• Reboot the phone

• Try a factory reset

• Make sure you're on the same local network

Last updated: 01/08/2025

© Voyced
All information provided is copyrighted and purely informative in nature. It is maintained by Voyced with the greatest of care using reliable sources only.
Given the fast evolution of the telecom sector, Voyced does not offer any guarantee about the accuracy and completeness of the information offered. 
We explicitly do not give anyone permission to use this information in any other way than to inform themselves about what (legal) requirements there may be and they need to comply with when registering Services and/or DIDs with Voyced.