Tutorials · Routing & Internet
How to Provision SIP IP Phones on an IP PBX
Register desk phones to your IP PBX or hosted voice service: accounts, codecs, voice VLAN, auto-provisioning and testing.
Before you start
- SIP IP phones
- An IP PBX or hosted PBX with extensions created
- A voice VLAN (see the voice VLAN tutorial)
Step by step
Create extensions
On the PBX, create an extension per user with a strong SIP password.
Power and connect phones
Connect phones to PoE ports in the voice VLAN; the PC can connect through the phone.
Register the account
On the phone's web page, enter the SIP server, extension and password. Or use auto-provisioning (option 66) with a configuration server.
Choose codecs
G.711 for best quality on the LAN; G.729 or Opus where bandwidth is limited.
Set time and display
Configure NTP and time zone so call logs are correct.
Test calls
Internal, external, transfer, hold and voicemail. Check audio in both directions.
Secure
Change default admin passwords, use TLS/SRTP where supported and never expose the PBX to the Internet without protection.
Pro tips
- Use templates for mass provisioning.
- Monitor one-way audio issues, usually caused by NAT or firewall SIP ALG settings.
FAQ
Frequently asked questions
Why can I hear the other side but they cannot hear me?
One-way audio is usually NAT or SIP ALG on the firewall. Disable SIP ALG and configure correct NAT settings.
Keep learning
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Ask Navijin technical support or an authorised partner for help with your configuration.