SIP trunking
Order SIP trunk channels and trunk licences, choose a call plan for each trunk, and cancel them.
Services › SIP trunking is where you order what you need to connect another phone system to your PBX: your own on-premises or hosted PBX, another provider, a voice AI platform or Microsoft Teams. You then add a SIP trunk object to your call flow on the PBX tab.
You order two things here:
| Item | What it’s for |
|---|---|
| Channels | How many calls can be connected at the same time, inbound and outbound, across all your SIP trunks. One channel carries one call. |
| Trunk licences | One per SIP trunk object in your call flow. Each licence has its own call plan and subaccount. |
For example, you can order 6 channels and give 3 to one SIP trunk object and 3 to another. You set how many each trunk uses with Number of channels in the SIP trunk object.
Channels
Section titled “Channels”Click + or − next to Channels to change how many you have. The change goes into the Order summary on the right.
You can’t reduce channels below the number your SIP trunk objects use. If you try, the portal asks you to decrease their usage in the PBX first: lower Number of channels in your SIP trunk objects and click Apply configuration, then order fewer channels.
Trunk licences
Section titled “Trunk licences”The Trunk licences table lists every licence you have.
| Column or setting | What it does |
|---|---|
| Search by name or subaccount | Finds a licence. |
| Call plan (filter) | Shows only licences on one call plan. |
| Show only non-assigned licences | Shows licences that no SIP trunk object uses yet. |
| PBX object name | The SIP trunk object that uses this licence, or Not assigned licence. |
| Call plan | The call plan for outgoing calls through this trunk. You need one if you plan to make outbound calls through the SIP trunk. You can change it at any time. |
| Subaccount | The licence’s subaccount. You can use subaccounts to filter reports. |
| Unsubscribe | Cancels the licence. |
| Add licence | Adds a new trunk licence. |
To compare call plan rates, use Check call rates.
Order channels and a trunk licence
Section titled “Order channels and a trunk licence”- Go to Services › SIP trunking.
- Set the number of Channels with +.
- Click Add licence and choose a Call plan for the new licence.
- Check the cost in the Order summary on the right.
- Tick Agree to service terms and conditions and click Submit order.
See Order summary for how charges are shown and what to do if your balance is too low.
Then add the trunk to your call flow: drag a SIP trunk object onto the canvas, choose the call plan of the new licence in SIP trunk call plan (the list shows trunk call plans that still have a free licence), set the Number of channels and click Apply configuration. See SIP trunk.
Change a trunk’s call plan
Section titled “Change a trunk’s call plan”- Find the licence in Trunk licences.
- Choose a different Call plan.
- Tick Agree to service terms and conditions and click Submit order.
Archived call plans can’t be chosen for a new licence. A licence already on an archived plan keeps it until you change it.
Cancel a trunk licence
Section titled “Cancel a trunk licence”You can’t cancel a licence while a SIP trunk object uses it.
- On the PBX tab, delete the SIP trunk object or switch it to another licence, and click Apply configuration.
- Go to Services › SIP trunking and click Unsubscribe next to the licence.
- Tick Agree to service terms and conditions and click Submit order.
Changed your mind before submitting? Click Cancel next to the licence to keep it. For a licence you added but haven’t ordered yet, click Cancel order.
Set up the other side
Section titled “Set up the other side”Step-by-step guides for connecting other systems: