When Microsoft introduced Operator Connect, it filled a gap between the simplicity of Calling Plans and the power of Direct Routing. Operator Connect lets certified telecom operators provide calling through Teams — simpler than Direct Routing, more flexible than Calling Plans.
But for enterprises with complex infrastructure, Operator Connect has significant limitations. This article compares Operator Connect and Direct Routing across the dimensions that matter to enterprise buyers.
The Three Options Recap
Microsoft Calling Plans — Microsoft is your phone company. Simplest setup, highest cost, least control. No analog support. Basic E911.
Operator Connect — A certified operator (Verizon, AT&T, BT, etc.) provides calling through Teams. Simpler than Direct Routing, more carrier options than Calling Plans. The operator manages the SBC — you don't.
Direct Routing — You connect your own SBC to Teams. Maximum control, maximum flexibility, lowest cost at scale. You manage the SBC. Full analog support, custom routing, engineered E911.
What Operator Connect Is
Operator Connect is Microsoft's program for certifying telecom operators to provide PSTN connectivity through Teams. Instead of Microsoft being your phone company (Calling Plans) or you managing your own SBC (Direct Routing), an operator handles the connectivity.
How it works: You contract with an Operator Connect-certified operator. The operator manages the SBC infrastructure that connects to Teams. You assign phone numbers through the Teams admin center. The operator handles call routing, PSTN connectivity, and (to varying degrees) E911.
Benefits:
- Simpler than Direct Routing — no SBC to manage
- More carrier options than Calling Plans — you can choose your operator
- Operator handles the technical complexity
- Integrated into the Teams admin center for number management
Operator Connect Limitations for Enterprises
For small and mid-size enterprises with simple needs, Operator Connect is a good option. But for large enterprises with complex infrastructure, the limitations are significant:
1. No analog device support. Operator Connect does not give you an SBC — the operator manages it, and you don't have access to connect ATAs. If you have elevator phones, paging systems, or fax machines, Operator Connect cannot integrate them. This is a hard blocker for many enterprises.
2. Limited custom routing. You're dependent on the operator's routing configuration. Custom dial plans, least-cost routing, time-of-day routing, and complex call flows are limited to what the operator supports. Direct Routing gives you full SIP-level control.
3. Carrier lock-in. Once you're on Operator Connect with a specific operator, changing operators means re-provisioning all your numbers and reconfiguring your service. Direct Routing lets you change carriers by updating SIP trunk configuration on your SBC — no user impact.
4. E911 depends on the operator. Some operators offer robust dynamic E911 with PIDF-LO; others provide only basic civic-address-level E911. You're dependent on the operator's E911 capabilities and can't engineer your own. For enterprises with RAY BAUM's Act compliance requirements, this may be insufficient.
5. Less SIP troubleshooting depth. When call quality issues arise, you're dependent on the operator's support team. With Direct Routing, you have direct access to SBC logs, SIP traces, and call quality monitoring — you can troubleshoot at the packet level.
6. Cost. Operator Connect uses per-user pricing (similar to Calling Plans, set by the operator). At enterprise scale, this is more expensive than Direct Routing's shared-trunk model.
Direct Routing Advantages
Direct Routing gives you what Operator Connect can't:
- Full SBC control — you configure, monitor, and troubleshoot your own SBC
- Analog integration — ATAs connected to your SBC for elevator phones, paging, fax
- Custom routing — any dial plan, any routing logic, any carrier
- E911 engineered to your spec — PIDF-LO dynamic location through your SBC
- Carrier flexibility — any SIP trunk provider, switchable without user impact
- Cost arbitrage — shared-trunk pricing, 60%+ savings vs per-user models
- SIP troubleshooting — direct access to SBC logs and SIP traces
When to Choose Each
Choose Operator Connect if:
- You have fewer than 1,000 users
- You have no analog devices
- You don't need custom routing
- You want simplicity and don't want to manage an SBC
- Your operator offers sufficient E911 capabilities
- Cost at scale is not a primary concern
Choose Direct Routing if:
- You have 1,000+ users (cost arbitrage becomes significant)
- You have analog devices (elevator phones, paging, fax)
- You need custom routing or dial plans
- You have E911 compliance requirements that need PIDF-LO dynamic location
- You want control over your SIP infrastructure
- You want to reduce annual voice costs by 60% or more
The Bottom Line
Operator Connect is a good option for enterprises that want simplicity and don't have complex infrastructure. But if you have analog devices, custom routing needs, E911 compliance requirements, or more than 1,000 users, Direct Routing is the stronger path — and the more cost-effective one.
The test is simple: ask "What happens to our elevator phones?" If the answer is "Operator Connect can't handle them," you need Direct Routing.
Compare Direct Routing vs Calling Plans or get a migration assessment to see which option is right for your enterprise.