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Collaboration, Voice & AV · Intermediate

Direct Routing

A Teams Phone PSTN option in which a customer-managed certified SBC connects Teams to a carrier or existing telephony.

Definition

With Direct Routing, a Microsoft-certified SBC (such as AudioCodes, Ribbon, Oracle or Cisco CUBE) pairs with the Teams SIP proxy over TLS using an FQDN in a verified tenant domain and a public certificate. Calls are routed by online voice routing policies, PSTN usages and voice routes, and media uses SRTP with optional media bypass. It allows integration with on-premises PBXs and carriers not offered through Operator Connect.

Example

New-CsOnlinePSTNGateway -Fqdn sbc1.contoso.com -SipSignalingPort 5061 -Enabled $true pairs an SBC.

Exam tip

SBC FQDN must belong to a domain registered in the tenant and present a publicly trusted certificate.

Related terms