Making outbound voice calls

Send outbound calls from your SIP platform through cloudnumbering.

Before you start

You need a cloudnumbering number for caller ID and the public source IPv4 address used by your SIP platform.

Allow your source IP

Go to Account Settings > Your IPs.
Under Allow IP, enter the public source IPv4 address in IP.
Select Add.

Configure your SIP platform

Set the trunk destination to sip.cloudnumbering.com.
Set the caller ID to a cloudnumbering number on the same account as the allowed source IP.
Send the destination as an E.164 number, with or without the leading +.
Place a test call.

What happens next

cloudnumbering identifies the account from the source IP and checks that the account owns the caller-ID number before routing the call.

Troubleshooting

cloudnumbering rejects every call from my PBX

Calls from a source address that is not on your allowlist are rejected with SIP response 418. If your PBX logs show 418 on every call, open Account Settings > Your IPs and confirm that it contains the public IPv4 address cloudnumbering sees, not a private address from your local network. If your outbound NAT address changed, add the new address.

Calls fail only with one caller ID

Confirm that the caller-ID number appears in the same account's Number Management > Number Inventory and is in service.

My PBX cannot resolve the trunk destination

Use the hostname sip.cloudnumbering.com. Do not save a numeric address returned by DNS as the permanent trunk destination.