- Home
- SIP Trunking Providers
- AT&T IP Flexible Reach
AT&T IP Flexible Reach
Dallas, Texas, United States
What it 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 while allowing an existing PBX and current voice equipment to remain in use. Voice and data share an integrated access circuit, and businesses can increase or decrease concurrent call channels. Branch extensions can share trunks across locations. The service connects premises-based or cloud-based Microsoft Teams PBX systems to the public switched telephone network. Teams customers may use their own certified Session Border Controller or have AT&T host and manage one. AT&T says calls travel on its MPLS network rather than the public internet, while on-net VoIP-to-VoIP calls within that network do not incur additional charges. A web portal provides performance reporting, call-detail reporting, and e-ordering. Network access requires AT&T Dedicated Internet Service or AT&T Virtual Private Network. Pricing is available on request.
For and against
For
- Works with existing PBX equipment
- Adjustable concurrent call channels
- Supports Microsoft Teams PBX integration
- Branch offices can share trunks
- Web portal includes reporting and e-ordering
Against
- Requires AT&T dedicated network access
- Pricing is available on request
- Listed plan has six channels
The verdict
AT&T IP Flexible Reach extends business calling through SIP trunks while preserving existing equipment. Its dedicated AT&T network requirement and requested pricing are important planning considerations.
Who it suits
This service suits businesses with existing telephony equipment, PBX systems, branch offices, or Microsoft Teams calling needs. It is intended for organizations requiring adjustable call capacity.
Plans and prices
AT&T IP Flexible Reach
Pricing not listed; contact AT&T for sales information
Read 9 Oct 2026 · business.att.com
On the record
- Branch offices
- Branch office extensions can share trunks across multiple locations.business.att.com · read 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 · read 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 · read 9 Oct 2026
- Existing equipment
- Businesses can use their current voice equipment and add SIP trunking to an existing PBX.business.att.com · read 9 Oct 2026
- Management portal
- A web-based portal provides performance reporting, call detail reporting, and e-ordering.business.att.com · read 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 · read 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 · read 9 Oct 2026
- Network
- AT&T says calls are carried on its MPLS network rather than the public internet.business.att.com · read 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 · read 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 · read 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 · read 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 · read 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 · read 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 · read 9 Oct 2026
