Direct Routing - Connecting analog devices

Publisher

Microsoft Learn

URL

https://learn.microsoft.com/en-us/microsoftteams/direct-routing-analog-devices

Published

2026-09-10

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Microsoft Learn terms of use; content CC BY 4.0 in the public docs repository; short excerpts and locators only

Source notes citing this source

• For Direct Routing, Microsoft defines an analog device as any device that can send DTMF digits to place a call, naming analog phones, fax machines and overhead pagers as examples. in context
• Calls to an analog device behind an ATA are reached by an online voice route (New-CsOnlineVoiceRoute) whose number pattern matches the analog device numbers and whose gateway list points at the SBC; Microsoft says to run it per analog device or use a suitable pattern in an earlier route. in context
• To connect analog devices to Teams Phone Direct Routing an Analog Telephony Adapter (ATA) is required, and the ATA must be supported by the certified SBC vendor. in context
• In Microsoft's Direct Routing analog example, the Set-CsUser and Grant-CsOnlineVoiceRoutingPolicy steps are run for each Teams user excluding ATA device users. in context
• Microsoft's example for analog devices on Direct Routing has seven steps: connect the SBC, create the PSTN usage, create a voice route tied to that usage, create a voice routing policy with the usage, enable the online user, grant the policy to the user, and create a voice route for the analog device. in context
• Analog phones connected to an ATA on Direct Routing are not searchable from Teams; Teams users must manually enter the device's phone number to call it. in context
• Microsoft defers the ATA-to-SBC configuration to the SBC manufacturer's guide and links AudioCodes, Ribbon and Oracle documentation. in context
• In Direct Routing, signaling and media from an analog device flow through the ATA to the SBC, and the SBC routes the call to a Teams endpoint or to the PSTN based on its internal routing table. in context
• For Teams Direct Routing, the analog telephony adapter must be supported by the certified SBC vendor, and the SBC routes analog-device calls to Teams or the PSTN according to its own routing table. in context
• Microsoft's Direct Routing guidance counts fax machines as analog devices, which connect to Direct Routing through an analog telephony adapter behind the SBC. in context
• To connect analog devices to Microsoft Teams Direct Routing an ATA is required and the ATA must be supported by the certified SBC vendor. in context
• Microsoft's Direct Routing analog devices guidance counts fax machines among analog devices alongside analog phones and overhead pagers. in context
• Because Microsoft's Direct Routing analog guidance says nothing about T.38 and defers ATA and SBC configuration to the SBC vendors, fax media handling in Direct Routing appears to be the responsibility of the ATA and SBC rather than a documented Teams capability. inferred in context
• For Teams Direct Routing, Microsoft treats an analog device as any device that can send DTMF digits to place a call, and names analog phones, fax machines and overhead pagers as examples. in context
• Analog phones connected to an ATA cannot be found by search in Teams, so Teams users must dial the device's phone number manually. in context
• Microsoft's Direct Routing analog example creates an online voice route for each analog device with that device's number pattern, or uses a single pattern that covers the analog devices. in context
• To connect analog devices to Teams Direct Routing, an Analog Telephony Adapter is required, and the certified SBC vendor must support that adapter. in context

Cite this source record

APA

WarmTransfer. (2026, September 10). Direct Routing - Connecting analog devices. WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-dr-analog-devices

BibTeX

@misc{warmtransfer-ms-learn-dr-analog-devices,
  title  = {Direct Routing - Connecting analog devices},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-dr-analog-devices},
  note   = {Microsoft Learn, accessed 2026-09-24}
}