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Microsoft Teams SIP Gateway
Capital expenses for 1000’s of new IP phones has been a top contributor to delayed migrations to newer phone systems, including Microsoft Teams. Microsoft Teams now has the capability to connect and utilize several legacy, non-native Microsoft IP Phones. This is possible due the recent announcement of general availability for SIP Gateway. SIP Gateway is a 100% cloud-based solution, no infrastructure required and no additional cost.
SIP Gateway supports Cisco (with MPP firmware), Polycom VVX, Yealink, and AudioCodes 400 series.
If Cisco devices are using Enterprise firmware, they will be required to convert to Multiplatform firmware. MPP firmware is not supported by Cisco Unified Communication Manager.
AudioCodes devices may require an update to have all available options (such as Provisioning URL) when configuring SIP Gateway.
At the GA release of SIP Gateway, the following features are supported. While it may not be an extensive list or advanced feature, it does cover all basic calling requirements.
There is a small amount of administrative setup to SIP Gateway, three simple steps.
2. Enable users to use SIP Gateway via Teams Calling Policies. Two methods:
a.) Teams Admin Center (Voice > Calling policies)
Set-CsTeamsCallingPolicy -Identity Global – AllowSIPDevicesCalling $true
3. Configure SIP Gateway Provisioning Server URL
Which URL you use depends on your region. There are three choices.
Preferably, you would configure DHCP Scope options to push this URL administratively to devices, otherwise you can setup this provisioning URL manually per device.
For better onboarding control, you can add your devices to the Teams Admin Center in advance, one at a time or in bulk. In the Teams Admin Center > Devices > SIP Devices, select Actions > Provision devices in the top right corner.
You need two attributes to pre-provision devices, MAC Id and Location. You can add this manually one at a time or use a CSV file to upload in bulk. Once uploaded, you will need to select each device to generate a verification code. This is used on the device to activate it. Once activated, you can go back to the Teams Admin Center Provision Devices page and select waiting for sign in. You can use this page to initiate sign in of each device using the Web Sign in method and device code.
End User Experience
After provisioning server is set, the phone will reboot and will either upgrade or downgrade the firmware to the Microsoft approved version respectively for each device model. After this has processed, you will see a simple interface with the Teams icon and a Sign in option. This sign in process uses Microsoft device authentication web sign in (https://microsoft.com/devicelogin). Go to this site with any browser, enter the code, and sign in with your account. Once complete, the phone may or may not restart, but once it is ready you will be able to make and receive calls on this device.
Boot Up and Sign-In Page
Making a call
These are some additional comments to consider when implementing SIP Gateway.