Bring your own carrier (BYOC)

BYOC only works with VoIP phone numbers. You'll need to ask your VoIP provider if it's supported. Due to telephony regulations, BYOC is not available for Turkish numbers.

BYOC is a way to keep your existing phone provider while receiving your inbound calls in Close.

It's great alternative to porting your numbers. It also allows you to use Close in countries where we currently don't offer phone numbers (e.g. China or Russia).

Incoming vs. outgoing calls

BYOC does not impact outgoing calls. All outgoing calls are made through Close's telephony network (however, your caller ID will match your BYOC'd number). As a result, you will be subjected to our provider's calling rates and not your current provider.

Incoming calls are first routed through your existing carrier, then over to Close (where the call will ring). There's no wait or ring time for the routing change; it all happens seamlessly. As per costs, you may be charged by both your provider and by Close, if your provider doesn't charge for incoming calls, then you will just be subjected to our incoming calling rates.

Can I continue using my softphone after setting up BYOC?

You will still be able to make outgoing calls with your softphone. However, the incoming calls will always be routed to Close. It's not possible to have both your softphone and your Close app ring at the same time.

Setup if your number is with Twilio

  1. Send an email to [email protected] and include the following:
    • Phone number(s) you wish to forward and their corresponding user account in Close.
  2. Once you've received confirmation from the Close support team, you'll need to set up BYOC forwarding for each of the numbers you wish to use in Close.
  3. Go to your Twilio account > Phone Numbers > Manage Numbers > open a phone number
Twilio phone number configuration page

Twilio phone number configuration page

  1. Scroll down on the setup page, under the Voice and Fax section, find When a call comes in, set it to TwiML bin, and click on + icon to add a new bin.
Creating a new TwiML Bin

Creating a new TwiML Bin

  1. Copy/paste the code below to create a new TwiML Bin and make sure to replace {{To}} with your actual number and select a forwarding location {{Region}} based on your geographic location. (This helps minimize latency.):
    • us.sbc.phone.close.com
    • eu.sbc.phone.close.com
    • asia.sbc.phone.close.com
    • au.sbc.phone.close.com
<?xml version="1.0" encoding="UTF-8"?>
<Response>
   <Dial>
      <Sip>sip:{{To}}@{{Region}}</Sip>
   </Dial>
</Response>

For example, if you are forwarding a US number +1 (833) 462-5673 your code would look like this:

<?xml version="1.0" encoding="UTF-8"?>
<Response>
   <Dial>
      <Sip>sip:[email protected]</Sip>
   </Dial>
</Response>
Sample TwiML Bin code for +1 (833) 462-5673

Sample TwiML Bin code for +1 (833) 462-5673

Save the bin, save the number, give it ~10 minutes to propagate, and give it a go - try to call the number and your Close app should ring for an incoming call.

Setup if your number is with other carrier

  1. Contact your existing carrier to find out if and how to forward your calls to another carrier via SIP.
  2. Ask your carrier for a list of IP addresses used to forward the calls. We will need them for an IP whitelist to be able to accept incoming calls.
  3. Send an email to [email protected] and include the following:
    • Name of the existing carrier.
    • Phone number(s) you wish to forward and their corresponding user account in Close.
    • IP addresses from your existing carrier to be added to our whitelist.
  4. Once you've received confirmation from the Close support team, have your carrier set up forwarding for each of the numbers you wish to use in Close. Have them select a forwarding location based on their geographic location. (This helps minimize latency.):
    • us.sbc.phone.close.com
    • eu.sbc.phone.close.com
    • asia.sbc.phone.close.com
    • au.sbc.phone.close.com
  5. Set up a SIP forward rule with your existing carrier. It should have this format: <number>@<hostname from step 4>.

Calling via external providers

Close doesn't provide an option of SIP forwarding to 3rd party providers. All calls in Close must be made through our telephony network - either directly or forwarded from 3rd party providers.

Updated 6 days ago


Bring your own carrier (BYOC)


Suggested Edits are limited on API Reference Pages

You can only suggest edits to Markdown body content, but not to the API spec.