Connect your SIP Phones to Callroute

Register your SIP phones directly to Callroute and start making calls in minutes.

Connect SIP Phones to Callroute and Microsot Teams

Save 60% vs Microsoft Teams SIP Gateway

For customers who want to use Microsoft Teams voice for their business and wish to continue to use current SIP phones. Simply register these phones directly to Callroute and make calls within seconds.

SIP Phone registration made easy

Using your existing SIP phones as an endpoint you can create a SIP registration using Callroute in less than 2 minutes. Simply choose a name, transport protocol and phone number and Callroute will do the rest!


Any SIP Phone

Any Phone that supports SIP standard RFC3261

Secure Voice

Encrypted signalling and media keeps conversations private

Internet Connected

Register over the internet enabling work for home

Hold & Transfer

All basic call controls you expect from a business handset

Address Book

Use AzureAD contacts to allow Teams address book search

HD Voice

High Definition Voice as standard

SIP Phone FAQs

What phones do you support?

We support any SIP phone that has firmware compatible with RFC3261 standard SIP.


Polycom VVX, Grandstream, Yealink Tx phones will work out of the box.


Proprietary phones such as Cisco, Avaya may require a firmware upgrade. For these, you should contact your vendor.

Do you have a cloud device provisioning service?

No. All phones will need to be configured manually.

Do you support extensions?

At the moment all SIP phones require a direct dial number. Extensions support is something we are actively investigating.

Can Microsoft Teams users call these phones?

Microsoft 365 has the ability to create organistion contacts that are searchable in your global address book service.


Adding the SIP phone as an organisational contact along with its number allows Teams users to search for “Security Desk” within their Teams client and call the contact using Direct Routing and Callroute.

Do I need to buy the Common Area Phone License?

No. You do not need to purchase Microsoft licences for SIP Phones to work using Callroute.

Are there any limitations with SIP Phone?

SIP Phone allows you to connect a basic handset to your telephone line.


These are useful for common areas or facility based offices such as security, logistics etc.


They are perfect for basic call handling and users will benefit from all the basic controls expected from a phone e.g. answer, hold, transfer and mute.


You will be able to join Microsoft Teams, Zoom or Webex meetings using the phones as long as the meeting supports dial in conferencing.


Advanced calling features such as group calling, shared line appearance, call pickup groups are not supported

Intermittent Microsoft Teams calling issues reported globally. This issue appears to be affecting all Microsoft customers worldwide. Microsoft are currently investigating the issue. All Callroute systems are fully operational. More information will be provided as soon as possible.