IP PBX appliance
Resonance Telcom SIP trunks for Grandstream UCM
Connect your Grandstream UCM appliance to Resonance Telcom SIP trunks and manage outside lines from the same web interface.
About Grandstream UCM
The Grandstream UCM series is a line of on-premises IP PBX appliances designed for small and mid-sized businesses. Each unit is managed through a built-in web interface.
UCM appliances support standard VoIP trunks, so Resonance Telcom connects without extra hardware.
Why Resonance Telcom for Grandstream UCM
- Add Resonance Telcom as a standard VoIP trunk in the UCM web interface.
- Grow channels and numbers from our portal without reconfiguring the appliance.
- Help from engineers who understand UCM trunk, NAT and codec settings.
Connection settings for Grandstream UCM
Use these values when you add Resonance Telcom as a SIP trunk. Your account-specific credentials and number assignments are provided when your account is activated.
| SIP server / registrar | sip.resonancetelcom.example |
|---|---|
| Port | 5060 (UDP/TCP), 5061 (TLS) |
| Transport | UDP, TCP or TLS |
| Codecs | G.711u, G.711a, G.729 |
| Authentication | SIP registration or IP authentication |
How to configure Grandstream UCM
Grandstream UCM setup guide in progress
Step-by-step instructions for Grandstream UCM are being finalized. Contact us and an engineer will walk you through setup.
Grandstream UCM FAQs
Where do I add a VoIP trunk on a UCM?
In the UCM web interface, VoIP trunks are configured in the trunk settings. Menu names vary slightly by firmware version, and we can confirm the path with you.
Can I use more than one trunk?
Yes. UCM appliances support multiple trunks, and you can create more than one trunk under your Resonance Telcom account.
Ready to move your phones to SIP?
Tell us about your phone system and how many calls you handle. We will put together a plan that fits.