Which Microsoft Teams Phone PSTN calling
solution may be right for you?

See the directional guidance below that aligns with the characteristicsof your organization. Your Microsoft account team can help you
create a calling strategy including one or more of these solutions.
Current Operator and Deployment

If you…

1st Party

Teams CallingPlans

3rd Party

Operator
Connect

Teams Phone
Mobile*DirectRouting

Teams Calling
Plans

Operator
Connect

Teams Phone
Mobile*DirectRouting

Teams Calling
Plans

Operator
Connect

Teams Phone
Mobile*DirectRouting

Have an existing relationship with anoperator you wish to maintain
Wish to maintain your existing PSTN
connections
Need to maintain an on-premises
deployment
Need to integrate with legacy on-premises
systems

Speed to Deploy and Internal Telephony ExpertiseIf you…
Require a quick deployment
Need a 3rd party to manage PSTN
connectivity

Regional and Workforce Characteristics

If you…
Are in a region where Teams Calling Plans
are not yet available
Operate in a region that has uniqueregulatory requirements around telephony
Have a multi-national footprint and wish
to simplify calling deployment andmanagement
Support mobile workers* Based on market availability

To learn more
PSTN connectivity options
Blog on PSTN Options
Download the Gartner MQ report

Classified as Microsoft Confidential

Microsoft Teams keeps 12M PSTN users connected
Read the Forrester Total Economic Impact ofTeams PhonePSTN Connectivity Options for Teams Phone
Teams Phone provides complete Private Branch Exchange (PBX) capabilities, allowing
VoIP calls between Microsoft Teams users, regardless of geographical area.
However, to enable users to make calls outside your organization, you need to connect
Phone System to the Public Switched Telephone Network (PSTN). Thankfully, Teams
makes this easy with first and third-party options designed for different needs andtechnical requirements.
Evaluate the following PSTN connectivity models and select the model (or models) thatwork best for you.
Operator ConnectTeams Phone Mobile

A great option for:A great option for:

Choose from participating operators to manage theservices and hardware to bring PSTN connectivity
to Teams.
• Quick deployment• Organizations with existing service agreements withparticipating operators• Third-party management of SBCs and other hardware• Multi-nationals with locations outside Teams Calling Planmarkets

Requirements:

A single business-provided mobile number can also be
your Teams Phone number, enabling seamless callingand voice services across networks and devices.
• Quick deployment• Enabling a secure, compliant, and simplified calling solution
for mobile and hybrid workers• Saving costs associated with fixed lines, devices, andhardware

Requirements:• Teams Phone license• Service provided by a participating Operator Connect partner• Teams Phone license• Service and phone number provided by a participating
Team Phone Mobile operator partner

Learn more >Learn more >Direct Routing

Teams Calling Plans

Highly customizable deployment, allowing you tomaintain existing service provider agreements andon-premises hardware. Available globally throughpartners.
A great option for:• Organizations with existing PSTN infrastructure (SBC or voicetrunks) and ongoing operator agreements• PBX co-existence scenarios• Regulatory requirements around telephony• PSTN survivability needs• Organizations with a large number analog devices

Requirements:• Teams Phone license• Meet specific infrastructure requirements for the supportedSBCs, domains, and other network connectivity

Learn more >Classified as Microsoft ConfidentialA fast and simple way to set up PSTN calling, withMicrosoft as your operator.
A great option for:• Quick deployment• Simplicity that comes with all-in-one solution from a singleprovider• When there isn’t on-premises PSTN infrastructure• Flexibility with Domestic, International and Pay-As-You-Go
Calling Plans• Organizations within any of the Teams Calling Plans markets• Multinational organizations looking to simplify deployment
and management

Requirements:• Teams Phone license• Teams Calling Plan

Learn more >