Hello,
If you want to use an OVH SIP line with UniFi Talk, here is the configuration that works for us.
1. Retrieve your OVH line information
In the OVH client area:
Telecom → Telephony → Select your billing group → Your line
In the General Information section, note the following details:
-
Login / Username → your SIP login
-
Domain / Registrar → your SIP domain
-
Outgoing proxy → your SIP proxy
Note these details.
Then, in SIP line password, set a new password and keep it.
2. Create the SIP provider in UniFi Talk
In your UniFi console:
Talk → Settings → Phone Lines → 3rd Party SIP Providers → Create New
Enter:
-
Provider :
Custom -
Provider Name : your domain
Then add the following custom fields:
| Field | Value |
|---|---|
| proxy | your domain |
| register-proxy | your proxy |
| outbound-proxy | your proxy |
| realm | your domain |
| username | your login |
| password | the SIP password set above |
| from-user | your login |
| from-domain | your domain |
| extension | your login |
| register | true |
| context | public |
| codecs | PCMA |
| ping | 75 |
| expire-seconds | 800 |
3. Phone number
In Phone Number, enter your number in the format:
+33XXXXXXXXX
4. Advanced
In Advanced, add the IP addresses corresponding to your OVH SIP domain/proxy.
5. Audio codec
In:
Settings → System → Audio Codec
Select:
PCMA
6. Verification
At this step, you should be able to make calls from the UniFi Talk phone.
If you can also receive calls, the configuration is complete.
7. If inbound calls do not work
If your UniFi console is behind a double NAT or another router, you may need to:
- enable a DMZ to the UniFi console;
- or open the required ports.
Warning: perform these changes only if you understand their implications. A wrong configuration can lead to network security risks.
If it still does not work, also check the firewall rules of your UniFi console.
Debugging
UniFi Talk provides very little information about the real status of a third‑party SIP line.
To diagnose issues, you usually need to:
-
SSH into the UniFi console.
-
Access FreeSWITCH via:
fs_cli
- Check the logs and the status of SIP gateways.
This is currently the only way to get detailed information on SIP registration and possible errors.
Additional information
-
Tested with UniFi Talk 5.2.2
-
I am not affiliated with either OVH or Ubiquiti.
-
This tutorial is provided for informational purposes only. My liability cannot be engaged under any circumstances.
-
Some parameters may not be essential; I kept only those that allowed a working configuration.
