UCx SmartVoice SIP Trunking
Optimize Business Communications with
SIP Trunking from TPx
UCx SmartVoice is a SIP trunking solution that enables businesses to implement an advanced collaboration platform while keeping existing PBX hardware in place for voice services. This hybrid approach allows for a more gradual migration to cloud-based services and is backed by the experts at TPx.
Keep Your Phones
Save Money
Collaboration Functionality
How SmartVoice Works
UCx SmartVoice sends voice traffic from your current phone system over the same connection you use for data, eliminating the need for separate voice access. As a leading SIP trunking provider, we deliver this service over our own private IP network or over your existing bandwidth to give you secure, guaranteed performance.

UCx SmartVoice Features & Benefits
Streamlined Connectivity
UCx SmartVoice uses your data connection, so you can eliminate the costs of maintaining a separate circuit for voice.
Works with Many PBXs
With PRI, CAS, and SIP trunking options, UCx SmartVoice supports connectivity to both IP and traditional PBX systems.
VoIP Calling Features
You’ll gain advanced voice features like bundled usage, extension dialing between sites, and support for remote users.
Unified Communications
Add on collaboration tools like chat, video, and online meetings to create a feature-rich communications solution.
Work From Anywhere
UCx with Webex add on delivers access to your communication and collaboration tools when working outside the office.
Nationwide Presence
Select phone numbers from anywhere in the U.S. so you can eliminate long distance charges as you enter new markets.
Use Any Access
Get SIP calling over our own private IP network, or over your existing bandwidth with our managed SD-WAN service.
Future-Proof Communications
TPx’s SIP trunking provides cloud communications without the cost and hassle of replacing a phone system that has not reached its end of life.
Unparalleled Customer Care
Our network operations center oversees service performance 24/7/365 to ensure quick resolution if issues arise.
Over 18K Customers Trust TPx

When Community Bank needed a SIP-based voice service and more reliable and secure network for their 90 different applications and systems, they turned to TPx. Learn how our secure, protocol agnostic network and quality voice-over-IP communications services provided better performance for the bank.
Need a SIP Trunking Provider ?
TPx delivers scalable, cloud-ready calling to your enterprise with our unique SIP trunking services.
Modern Communications for Modern Business
Ready to take your PBX system to the next level? TPx offers various modern, cloud communications that help drive business forward.

Combine calling, meetings, messaging and more into a single cloud-based application.
Frequently Asked Questions
- Provides physical, route, and DID failover option: The next-generation platform for unified communications and provides flexibility in trunking options, customer control of their voice through their own PBX platform and UC.
- Next generation platform: Latest technology and always updating
- Reduced risks: A forklift approach to technology upgrades can be risky and costly. TPx Cloud UC solutions, UCx with Webex and UCx SmartVoice SIP, are designed to work together, simplifying delivery of custom hybrid solutions that mitigate the risks and costs of complex migrations.
- Maximized ROI: Custom hybrid deployments are ideal for distributed businesses ready to begin their migration to a cloud unified communication solution while maximizing returns on existing investments.
- Unified dialing plans: Abbreviated dialing and on-net calling between UCx with Webex and UCx SmartVoice SIP.
- UC Functionality for everyone: With the UCx with Webex client available to our UCx SmartVoice customers, TPx gives your users the power to stay connected on any device. Voice and video calling, screen sharing, and online meeting rooms will increase productivity to enhance your team’s collaboration.