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AT&T IP Flexible Reach
What AT&T IP Flexible Reach is
AT&T IP Flexible Reach is a SIP trunking service for businesses using premises-based telephony equipment. It provides inbound and outbound local and long-distance calling, and can add SIP trunks to an existing PBX while businesses retain their current voice equipment. Voice and data share an integrated access circuit. Customers can adjust concurrent call channels, and branch extensions can share trunks across locations. The service can connect premises-based or cloud-based Microsoft Teams PBX to the public switched telephone network. For Teams integration, customers can provide their own certified Session Border Controller or have AT&T host and manage it. AT&T says calls travel over its MPLS network rather than the public internet, and on-net VoIP-to-VoIP calls within its IP network do not incur additional charges. Virtual telephone numbers can provide local visibility when a phone is outside its local calling area. A web portal provides performance and call-detail reporting and e-ordering. Network connection requires AT&T Dedicated Internet Service or AT&T Virtual Private Network for high-speed dedicated access. Pricing is available on request through AT&T sales.
Who it suits
It suits businesses with existing premises-based telephony equipment that need SIP trunking for calling or Teams PBX connectivity. Organizations with multiple branches may also use shared trunks across locations.
What it does well
- Works with existing voice equipment and PBX systems.
- Concurrent call channels can be adjusted.
- Branch extensions can share trunks across locations.
- Portal includes performance and call-detail reporting.
- On-net VoIP-to-VoIP calls incur no additional charges.
What to know first
- Requires AT&T Dedicated Internet Service or AT&T Virtual Private Network access.
- Pricing is available on request.
- Teams integration requires a certified Session Border Controller.
Limits
The listed plan includes 6 concurrent channels. Connecting to the AT&T network requires AT&T Dedicated Internet Service or AT&T Virtual Private Network for high-speed dedicated access.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| AT&T IP Flexible Reach | Pricing not listed; contact AT&T for sales information | On request |
As business.att.com lists them, read 9 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the AT&T IP Flexible Reach website.
- Contact AT&T for sales information and pricing.
- Arrange AT&T Dedicated Internet Service or AT&T Virtual Private Network for high-speed dedicated access.
- Connect the service to existing voice equipment or an existing PBX.
- For Teams integration, use a certified Session Border Controller or have AT&T host and manage one.
Verdict
IP Flexible Reach connects existing telephony equipment to SIP calling, with options for Teams integration and shared branch trunks. Businesses need the specified AT&T network access and should request a price from sales.
Questions
How much does AT&T IP Flexible Reach cost?
Pricing is available on request. AT&T lists sales assistance at 877-287-5676, Monday through Friday, 7 a.m. to 7 p.m. Central Time.
What does the listed plan include?
The listed plan has 6 concurrent channels and emergency calling.
Which platforms does it support?
The listed platform is web.
Can it connect to Microsoft Teams?
It integrates with premises-based or cloud-based Microsoft Teams PBX to connect to the public switched telephone network. Customers can provide their own Microsoft Teams-certified Session Border Controller or have AT&T host and manage one.
What network access does it require?
Connecting to the AT&T network requires AT&T Dedicated Internet Service or AT&T Virtual Private Network for high-speed dedicated access.
Are on-net VoIP calls charged extra?
On-net VoIP-to-VoIP calls routed within AT&T’s IP network do not incur additional charges.
Facts from AT&T IP Flexible Reach's own pages
- Branch offices
- Branch office extensions can share trunks across multiple locations. · business.att.com, 9 Oct 2026
- Call rate limit
- AT&T says there is no limit on the number of calls the service can originate per second. · business.att.com, 9 Oct 2026
- Call routing
- On-net VoIP-to-VoIP calls route within AT&T’s IP network and do not incur additional charges. · business.att.com, 9 Oct 2026
- Existing equipment
- Businesses can use their current voice equipment and add SIP trunking to an existing PBX. · business.att.com, 9 Oct 2026
- Founded
- 1885 · business.att.com, 28 Sept 2026
- Headquarters
- Dallas, Texas, United States · business.att.com, 28 Sept 2026
- Management portal
- A web-based portal provides performance reporting, call detail reporting, and e-ordering. · business.att.com, 9 Oct 2026
- Microsoft Teams
- The service integrates with premises-based or cloud-based Microsoft Teams PBX to connect to the public switched telephone network. · business.att.com, 9 Oct 2026
- Microsoft Teams SBC
- For Teams integration, customers can use their own Microsoft Teams-certified Session Border Controller or have AT&T host and manage it. · business.att.com, 9 Oct 2026
- Network
- AT&T says calls are carried on its MPLS network rather than the public internet. · business.att.com, 9 Oct 2026
- Network access requirement
- Connecting to the AT&T network requires AT&T Dedicated Internet Service or AT&T Virtual Private Network for high-speed dedicated access. · business.att.com, 9 Oct 2026
- Sales support
- AT&T lists sales assistance at 877-287-5676, Monday through Friday, 7 a.m. to 7 p.m. Central Time. · business.att.com, 9 Oct 2026
- Scalable channels
- Customers can increase or decrease concurrent call channels and pay for the number of lines they need. · business.att.com, 9 Oct 2026
- Virtual numbers
- Virtual telephone numbers can give a phone local visibility when it is outside the location’s local calling area. · business.att.com, 9 Oct 2026
- Voice and data
- The service combines voice and data over an integrated access circuit to simplify network management and optimize capacity. · business.att.com, 9 Oct 2026
- What it does
- AT&T IP Flexible Reach is a SIP trunking service for businesses using existing premises-based telephony equipment, providing inbound, outbound, local, and long-distance calling. · business.att.com, 9 Oct 2026
Where AT&T IP Flexible Reach stands on Freedom251
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