Plan for SIP Gateway

SIP Gateway lets your organization use any compatible SIP device with Microsoft Teams to preserve your investments in SIP devices. Now you can sign-in to Teams with your corporate credentials and make and receive calls with a compatible SIP device. Compatible devices can be Skype for Business IP phones with standard SIP firmware, Cisco IP phones with multiplatform SIP firmware, or SIP devices from vendors such as Poly, Yealink, and AudioCodes. To find out how to configure your SIP devices for SIP Gateway, see Configure SIP Gateway.

Benefits of SIP Gateway

SIP Gateway connects compatible SIP devices to Teams to help your users migrate seamlessly to Teams telephony. Using SIP Gateway, your users can do all of the following:

  • Make calls: SIP device users can make calls to the Public Switched Telephone Network (PSTN), to other SIP devices, and to Teams and Skype for Business users. SIP device users can only call users who have phone numbers.
  • Receive calls: SIP device users can receive a call from the PSTN, from Teams or Skype for Business users who have SIP devices, and from Teams and Skype for Business client applications. The SIP device acts as a Teams endpoint. Inbound calls will also be forked to the user's SIP device.
  • Multiple simultaneous calls: A SIP device user in a call can put the call on hold to make or receive other calls. A SIP device user can also conference two calls.
  • Do not disturb: A SIP device user can set do not disturb on the device so that the device will not ring for incoming calls. This has no impact on the user's status on all other Teams endpoints.
  • Hold/Resume and Mute/Unmute: A SIP device user can hold and resume or mute and unmute a call by using the features for those actions on the device.
  • Voicemail: SIP device users can listen to electronically stored voice messages that callers leave for them.
  • Message waiting indicator: SIP device users can receive notifications that alert them when they have new voicemail messages.
  • Sign-in and sign-out: SIP devices users can sign in and sign out of Teams on the device.
  • Dual-tone multi-frequency: SIP device users can press number keys to provide input during interactive voice response calls.
  • Teams meetings: A SIP device user can join a Teams meeting by dialing the meeting access number. Meeting participants can add a SIP device user to the meeting by dialing out to user's phone number or simply adding a participant by clicking on 'Request to Join' will also alert the user's SIP device. Guest users from another organization can be added to a Teams meeting by a participant who dials out to a guest user's number to include that guest.
  • Call transfers: SIP device users can transfer calls. SIP Gateway supports both blind and consultative transfers.
  • Local call forwarding: A SIP device user can set forwarding rules (always, on timeout, and busy) for the device. If the device is connected to the SIP Gateway, then the call will be redirected to the target address based on the rule that the device user set. To make local call forwarding work, the admin must set the AllowCallRedirect attribute in Set-CsTeamsCallingPolicy to Enabled.
  • Offboard stale devices: SIP Gateway supports auto offboarding of stale devices provisioned for a tenant. Paired (signed-in) devices will be offboarded if not connected for 30 days, and unpaired (signed-out) devices after 14 days. An offboarded device can be re-onboarded after a factory reset.

Requirements to use SIP Gateway

Teams users must have a phone number with PSTN calling enabled to use SIP Gateway.

Note

SIP Gateway is not available for government environments (GCC, GCC High and DoD).

Hardware, software, and licenses

If you have a 3PIP or SIP device, you must have:

  • A license for Microsoft Teams, Skype for Business Online Plan 2, and Microsoft 365 Phone System (via E5 or standalone licenses)
  • PSTN enablement (i.e., a phone number) via a Microsoft Teams Calling Plan, Direct Routing, or Operator Connect
  • A Common Area Phone license for any common area devices

Compatible devices

Vendor Model Minimum firmware version Approved firmware version Remarks Links
Cisco Devices running enterprise firmware must be converted to multiplatform firmware. Read the guide at the right to learn how. Cisco firmware conversion guide
88321 11.3.5MPP 11-3-7MPP
68211 11.1.1MPP 11-3-7MPP
78111 11.1.1MPP 11-3-7MPP
78211 11.1.1MPP 11-3-7MPP
78411 11.1.1MPP 11-3-7MPP
78611 11.1.1MPP 11-3-7MPP
88111 11.1.1MPP 11-3-7MPP
88411 11.1.1MPP 11-3-7MPP
88451 11.1.1MPP 11-3-7MPP
88511 11.1.1MPP 11-3-7MPP
88611 11.1.1MPP 11-3-7MPP
88651 11.1.1MPP 11-3-7MPP
Poly The device will auto-reboot and install the selected firmware.
Trio 8500 5.9.5.3182 7.2.2.1094
Trio 8800 5.9.5.3182 7.2.2.1094
VVX1501 5.9.5 6.3.1.8427
VVX2011 5.9.5 6.3.1.8427
VVX2501 5.9.5 6.3.1.8427
VVX300 5.9.5 5.9.7.3480
VVX3011 5.9.5 6.3.1.8427
VVX310 5.9.5 5.9.7.3480
VVX3111 5.9.5 6.3.1.8427
VVX3501 5.9.5 6.3.1.8427
VVX400 5.9.5 5.9.7.3480
VVX4011 5.9.5 6.3.1.8427
VVX410 5.9.5 5.9.7.3480
VVX4111 5.9.5 6.3.1.8427
VVX4501 5.9.5 6.3.1.8427
VVX500 5.9.5 5.9.7.3480
VVX5011 5.9.5 6.3.1.8427
VVX600 5.9.5 5.9.7.3480
VVX6011 5.9.5 6.3.1.8427
Rove B2 8.0.3.0010 8.0.3.0010
Rove B4 8.0.3.0010 8.0.3.0010
Rove 30 8.0.3.0010 8.0.3.0010
Rove 40 8.0.3.0010 8.0.3.0010
Yealink Yealink support
T21P 83 34.72.0.75
T21P_E2 83 52.84.0.125
T23G 83 44.84.0.140
T27G1 83 69.86.0.15
T29G 83 46.83.0.130
T301 83 124.86.0.40
T30P1 83 124.86.0.40
T31G1 83 124.86.0.40
T31P1 83 124.86.0.40
T33G1 83 124.86.0.40
T40G 83 76.84.0.125
T40P 83 54.84.0.125
T41P 83 36.83.0.120
T41S1 83 66.86.5.1
T42G 83 29.83.0.130
T42S1 83 66.86.5.1
T42U1 83 108.86.5.1
T43U1 83 108.86.5.1
T46G 83 28.83.0.130
T46S1 83 66.86.5.1
T46U1 83 108.86.5.1
T48G 83 35.83.0.130
T48S1 83 66.86.5.1
T48U1 83 108.86.5.1
T531 83 96.86.5.1
T53W1 83 96.86.5.1
T54W1 83 96.86.5.1
T57W1 83 96.86.5.1
W56H 61.85.0.56
W73H 116.85.0.38
W59R 115.85.0.56
W70B NOAM 146.85.5.4
W70B EMEA 146.85.5.2
W70B APAC 146.85.5.3
W80 NOAM 130.85.5.5
W80 EMEA 130.85.5.6
W80 APAC 130.85.5.4
W90 NOAM 130.85.5.5
W90 EMEA 130.85.5.6
W90 APAC 130.85.5.4
AudioCodes Some AudioCodes SIP devices need a provisioning URL setting. Download and install upgrade files for the affected AudioCodes devices at the right. Downloadable files for affected devices at AudioCodes
4051 2.2.8 2.2.16.589
405HD1 3.2.1 2.2.16.589
405HDG1 3.2.1 2.2.16.589
420HD1 3.2.1 2.2.16.589
420HDG1 3.2.1 2.2.16.589
430HD1 3.2.1 2.2.16.589
430HDG1 3.2.1 2.2.16.589
440HD1 3.2.1 2.2.16.589
445HD1 3.2.1 3.4.6.704
445HDG1 3.2.1 3.4.6.704
450HD1 3.2.1 3.4.6.704
C450HD1 3.2.1 3.4.6.704
445HD1 3.2.1 3.4.6.704
RX501 3.2.1 3.4.6.704
Spectralink Spectralink Support
7202 PCS22B PCS22B Handset
7212 PCS22B PCS22B Handset
7502 PCS22B PCS22B Handset
7522 PCS22B PCS22B Handset
7532 PCS22B PCS22B Handset
7622 PCS22B PCS22B Handset
7642 PCS22B PCS22B Handset
7722 PCS22B PCS22B Handset
7742 PCS22B PCS22B Handset
IP-DECT Server 200 PCS22Ab PCS22Ab IP-DECT Server
IP-DECT Server 400 PCS22Ab PCS22Ab IP-DECT Server
IP-DECT Server 6500 PCS22Ab PCS22Ab IP-DECT Server
Virtual IP-DECT Server One PCS22Ab PCS22Ab IP-DECT Server
IP-DECT Base Station PCS22Ab PCS22Ab IP-DECT Server
Ascom Ascom Support
Ascom d43 2.11.4 2.11.4 Handset
Ascom d63 2.11.4 2.11.4 Handset
Ascom d81 4.13.1 4.13.1 Handset
Ascom d83 4.13.1 4.13.1 Handset
Ascom Myco 3 DECT 3.4.1 3.4.1 Handset
IP-DECT Access Point IPBSx 11.8.8 11.8.8 IP-DECT Access Point
IP-DECT Gateway IPBL 11.8.8 11.8.8 IP-DECT Gateway
TDM Base Station R3N R3N IP-DECT Base Station
IP-DECT Virtual Appliance IPVM 11.8.8 11.8.8 IP-DECT Server

1 Device supports dynamic emergency calling (E911) with SIP Gateway.

Note

Customers can use AudioCodes OVOC and Poly Lens to manage device side configuration of their AudioCodes 400 series and Poly VVX/Trio devices respectively.

Note

Spectralink Handsets receive firmware updates over the air from Spectralink IP-DECT servers.

Note

Ascom Handsets receive firmware updates over the air from Ascom IP-DECT servers.

Note

For Yealink DECT Base Stations, please use the appropriate region specific firmware version listed above for having the best calling experience.

Note

For support queries, customers using IP-DECT systems with Teams SIP Gateway should reach out to their DECT manufacturer or their implementation channel partners.

Note

For some devices, the minimum firmware version is greater than the approved firmware version. This is because the 3.X version is the Skype for Business version. We update the SIP version which is 2.X.