Save Money and Modernize the Phone System You Already Have
Keep your existing phone system and route your calls over the internet with flexible, scalable SIP Trunks from UD Voice.
Savings on telephony costs
Quick, effortless deployment and management
Calls flow to a failover number during local outages
Uptime for enhanced reliability
What Is SIP Trunking?
SIP Trunking uses your internet connection to deliver phone service to the phone system you already own. Instead of paying for traditional phone lines, SIP Trunking creates virtual connections, or “trunks,” between your phone system and the UD Voice network.
Voice and data travel over a single, efficient network, so you can drop costly phone lines, add capacity as you grow, and say goodbye to the phone company.
Why Businesses Switch to SIP Trunking
Works With Your Existing System
Many systems are able to take advantage of SIP Trunking with no extra equipment, and you can add capacity at any time.
Cut Calling Charges
Save with reduced long-distance, toll-free, and international calling rates.
Free Inter-Office Calling
Call between your office locations for free, anywhere, anytime.
Business Continuity
If your site goes down and looses power or internet, calls automatically forward to a backup number.
Uses Your Internet Connection
Bypass the telecom giants and lower your operating costs.
Setup and Migration Handled
Our on-shore team helps with setup and migration from start to finish.
Build Your SIP Trunking Solution
Included With Every Trunk
- Direct Inward Dial (DID) number with every trunk
- E911 service that ties a location to your number
- CNAM and inbound Caller ID on your phone display
Unlimited Calling
A predictable flat monthly rate with all local and long-distance minutes included, so you never have to watch the clock or worry about overage charges.
Add Optional Features
- Automated Attendant
- Follow Me with Voicemail
- Remote Market Numbers
- Hosted Voicemail
- WebFax
- Toll-Free Numbers
Compatible With the Top PBX Manufacturers
Tested with more than 30 leading PBX brands. Not sure about yours? Our team will confirm compatibility before you switch.
Certified PBX List
UD Voice SIP Trunking is certified to work with these phone systems and gateways. Search for yours below.
Don’t see your system? It may still work. Ask our team.
Don’t see your PBX? Many other SIP-compatible systems work too. Ask our team about yours.