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Frontier SIP Trunking
What Frontier SIP Trunking is
Frontier SIP Trunking connects a business voice network with traditional or IP PBX systems and existing phone equipment. Businesses can add call paths to an existing PBX, scale usage up or down, and port current phone numbers to maintain continuity. Calling plans include blocks of long-distance minutes and telephone numbers. Frontier delivers the service over a fiber Ethernet Virtual Private Line; outside its fiber footprint, provisioning can use Frontier internet services or another provider’s internet. Frontier says its private network supports call security and call quality, while calls can be redirected to other offices or numbers during outages. Optional network redundancy is available for multiple business locations. Frontier advertises a 99.99% guaranteed circuit availability service level agreement for its Ethernet Virtual Private Network. Deployment support includes design, implementation, lifecycle management, 24/7/365 technical support, and customer-scheduled maintenance and upgrades. Pricing is customized and available on request, with packages based on the number of call paths needed. There is no free plan or trial. Service is available only in select areas, and Frontier notes that 100 Gbps internet speeds have limited availability. Frontier was founded in 1935 and is headquartered in Dallas, Texas.
Who it suits
Frontier SIP Trunking suits businesses with traditional or IP PBX equipment that need adjustable call capacity, number porting, and continuity options. It is relevant where Frontier service is available and customized pricing is acceptable.
What it does well
- Works with traditional and IP PBX systems
- Call paths can scale up or down
- Calls can redirect during outages
- 99.99% circuit availability SLA advertised
- 24/7/365 technical support
What to know first
- Service available only in select areas
- Pricing is available on request
- No free plan or free trial
- 100 Gbps availability is limited
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Customized pricing packages | Pricing is customized · buy only the number of call paths your business needs | On request |
As enterprise.frontier.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
Frontier SIP Trunking extends existing phone systems with scalable call paths, continuity tools, and managed deployment support. Availability depends on location, and pricing requires a customized quote.
Facts from Frontier SIP Trunking's own pages
- Availability
- Frontier says its Ethernet Virtual Private Network service has a 99.99% guaranteed circuit availability SLA. · enterprise.frontier.com, 11 Oct 2026
- Availability commitment
- Frontier advertises a 99.99% guaranteed circuit availability service level agreement for its Ethernet Virtual Private Network. · enterprise.frontier.com, 4 Oct 2026
- Call continuity
- Customers can port existing phone numbers and redirect calls to other offices or numbers during outages. · enterprise.frontier.com, 11 Oct 2026
- Calling plans
- Calling plans include blocks of long-distance minutes and telephone numbers. · enterprise.frontier.com, 11 Oct 2026
- Call paths
- Businesses can add call paths more easily than with traditional PRIs. · enterprise.frontier.com, 11 Oct 2026
- Continuity
- Optional network redundancy is offered for enhanced performance across multiple business locations. · enterprise.frontier.com, 4 Oct 2026
- Deployment support
- Frontier lists design, implementation and lifecycle management, plus 24/7/365 technical support and customer-scheduled maintenance and upgrades. · enterprise.frontier.com, 4 Oct 2026
- Founded
- 1935 · enterprise.frontier.com, 28 Sept 2026
- Headquarters
- Dallas, Texas, United States · enterprise.frontier.com, 28 Sept 2026
- Limits
- Frontier service is available only in select areas, and it says 100 Gbps internet speeds have limited availability. · enterprise.frontier.com, 4 Oct 2026
- Maker
- Frontier’s corporate site identifies Frontier as a Verizon company and describes it as a U.S. fiber provider. · newsroom.frontier.com, 4 Oct 2026
- Network delivery
- Frontier SIP is delivered over a fiber Ethernet Virtual Private Line, and can be provisioned over internet service for customers outside its fiber footprint. · enterprise.frontier.com, 11 Oct 2026
- Network speed
- The page says Frontier's fiber network offers dedicated internet speeds up to 100 Gbps, subject to limited availability. · enterprise.frontier.com, 11 Oct 2026
- Number porting
- Customers can port existing numbers to maintain call continuity. · enterprise.frontier.com, 4 Oct 2026
- PBX compatibility
- The service is designed to work with existing traditional or IP PBX systems and phone equipment. · enterprise.frontier.com, 11 Oct 2026
- PBX support
- The service is designed to work with traditional or IP PBX systems and existing phone equipment. · enterprise.frontier.com, 4 Oct 2026
- Private network
- Frontier says its private network provides call security and quality. · enterprise.frontier.com, 4 Oct 2026
- Product
- Frontier SIP Trunking unifies a business voice network and is described as a cost-effective way to extend and streamline communications infrastructure. · enterprise.frontier.com, 4 Oct 2026
- Purpose
- Frontier SIP Trunking connects a business voice network and is described as a way to widen and streamline communications infrastructure. · enterprise.frontier.com, 11 Oct 2026
- Redundancy
- Optional network redundancy is available for performance across multiple business locations. · enterprise.frontier.com, 11 Oct 2026
- Reliability
- Frontier says calls can be redirected to other offices or numbers during outages. · enterprise.frontier.com, 4 Oct 2026
- Scaling
- Businesses can add call paths to an existing PBX more easily than with traditional PRIs and scale usage up or down. · enterprise.frontier.com, 4 Oct 2026
- Security
- Frontier describes its private network as providing call security and says its network infrastructure secures communications. · enterprise.frontier.com, 11 Oct 2026
- Service limit
- Frontier states that the service is available in select areas. · enterprise.frontier.com, 11 Oct 2026
Where Frontier SIP Trunking stands on Freedom251
- SIP Trunking Providers#17 of 27