SIP Trunking & TeamsCommStack SIP & Teams trunks

SIP trunking
and Teams calling.

Our connectivity platform is CommStack SIP & Teams trunks. It gives your customers SIP trunks for the phone systems they already run, Microsoft Teams Direct Routing without the SBC headache, and fax to email.

Sell SIP Trunking & Teams → See the features ↓

Channels per trunk
Teams SBC domain
Fax to email

Example: customer systems connected through CommStackCommStackyour customer's side

In the marketSIP Trunking & TeamsSIP trunks · Microsoft Teams Direct Routing · fax to email
At CommStackCommStack SIP & Teams trunksConnectivity platform
Your customers buy fromYouSold, supported and billed by you

What's inside · CommStack SIP & Teams trunks

Everything your customers need.

The highlights, grouped the way your customers will use them. The full feature matrix is in the partner pack.

01SIP trunks

Connect

Registration or IPRegistration-based or IP-authenticated trunks.
Channels per trunkSet capacity for each customer and raise it as they grow.
Number formatsNational or international format, to suit the PBX.
Standard SIPWorks with the IP-PBXs customers already run.

02Caller ID

Present

Flexible presentationPresent the caller ID the way the PBX sends it.
Fixed caller IDPresent one number for every outbound call.
PrivacyWithheld numbers when customers need them.

03Microsoft Teams Direct Routing

Teams

Direct RoutingTeams Phone calling over CommStack.
An SBC domain per customerEach customer gets their own dedicated SBC domain.
Guided setupDomain verification and provisioning handled for you.

04Still needed

Fax

Fax to emailFaxes delivered to the inbox, for the customers who still get them.

For partners

Who buys it, and what you control.

01Businesses with their own PBX

Keep the system, change the lines.

02Microsoft 365 organisations

Calling in Teams, without running an SBC.

03MSPs

One supplier for the PBX, Teams and fax lines you manage.

Capacity per customerSet and change channel capacity for each SIP trunk.
Teams domainsA dedicated Teams domain for each customer.
API provisioning (Early access)Create SIP trunks and Teams services from your own systems.
Usage for billingCall records and summaries for your invoices.