Documentation (Direct Routing) — Microsoft Teams Phone

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Facts read from this source

• Direct routing definition Report an error

  “Direct Routing enables organizations to connect their own telephony infrastructure to Microsoft Teams Phone by using a supported, customer-provided Session Border Controller (SBC).”

• Compatible connectivity options Report an error

  “Organizations can also deploy Direct Routing alongside Microsoft Calling Plan, Operator Connect, and Teams Phone Mobile within the same Microsoft Teams tenant.”

• Sbc requirement Report an error

  “Only Microsoft-certified SBCs are supported with Direct Routing.”

• Infrastructure requirements Report an error

  “Session Border Controller (SBC) A Microsoft-certified SBC. Telephony trunks One or more PSTN trunks connected to the SBC. Microsoft 365 organization Microsoft 365 tenant hosting Teams users. User registrar Users must be homed online in Microsoft 365.”

• Sip connection points Report an error

  “Direct Routing connection points sip.pstnhub.microsoft.com, sip2.pstnhub.microsoft.com, sip3.pstnhub.microsoft.com”

• Licensing requirements Report an error

  “Direct Routing users require: Microsoft Teams Teams Phone”

• Islands mode unsupported Report an error

  “Direct Routing isn't supported in Islands mode.”

• Audio conferencing fallback Report an error

  “If a user doesn't have an Audio Conferencing license assigned, outbound conference calls route through Direct Routing.”

• Supported endpoints Report an error

  “Direct Routing supports: Microsoft Teams desktop and mobile clients Teams-certified phones Common Area Phones”

• Common area phone no calling plan Report an error

  “For Common Area Phones, a Calling Plan license isn't required when Direct Routing is used.”

• Onmicrosoft domain unsupported Report an error

  “The SBC FQDN must belong to a verified domain within your Microsoft 365 tenant. You can't use the default *.onmicrosoft.com domain.”

• Wildcard certificates Report an error

  “Wildcard certificates are supported when they comply with RFC 2818.”

• Gcc high root cas Report an error

  “DigiCert Global Root CA DigiCert High Assurance EV Root CA DigiCert Global Root G2”

• Supported environments Report an error

  “Direct Routing supports Microsoft 365, Office 365, Office 365 GCC, GCC High, and DoD environments.”

• Gcc high sip fqdn Report an error

  “For Office 365 GCC High, use: sip.pstnhub.gov.teams.microsoft.us”

• Dod sip fqdn Report an error

  “For Office 365 DoD, use: sip.pstnhub.dod.teams.microsoft.us”

• Sip port Report an error

  “SIP/TLS SBC Microsoft SIP Proxy 5061”

• Media ports Report an error

  “UDP/SRTP Media Processor SBC 3478–3481, 49152–53247”

• Media processor ip ranges Report an error

  “52.112.0.0/14 52.120.0.0/14”

• Media bypass available Report an error

  “Media traffic uses Microsoft Media Processors unless Media Bypass is enabled.”

• Media processor regions Report an error

  “Regions include: North America Europe Asia Japan Australia Latin America”

• Supported codecs Report an error

  “Direct Routing supports the following codecs between Microsoft Teams and the SBC. SILK G.711 G.722 G.729 AMR-WB (non-bypass only)”

• Media retargeting unsupported Report an error

  “Microsoft doesn't support media re-targeting during an active Direct Routing call.”

• Non certified sbc boundary Report an error

  “Microsoft may decline support requests involving non-certified SBCs.”

• Hybrid deployment pattern Report an error

  “Microsoft Calling Plan or Operator Connect for PSTN calling. Direct Routing for calls to third-party PBXs. Direct Routing for analog devices.”

• Mtls note Report an error

  “If Mutual TLS (MTLS) is enabled, install all required Microsoft Trusted Root certificates on the SBC.”

• Media port recommendation Report an error

  “Microsoft recommends allocating at least two media ports per concurrent call on the SBC.”

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