Twilio SIP Inbound Works, Outbound Doesn't

[Mack1]

I'm attempting to use Twilio as my SIP, and have successfully set it up to where I am able to receive incoming calls, but whenever I am calling out I get the following error

SIP Server/Call Manager ID: 12294
Call or Registration to +12253249***@(Ln.10000@Twilio) has failed. 54.172.60.0 replied: 403 Forbidden; from IP:54.172.60.0:5060

I have also set up the outbound rules according to the Twilio Setup guide by 3cx. I am not sure exactly what to do, so any help is appreciated.

 

[nub]

is your public ip on the acl?

 

[Mack1]

is your public ip on the acl?

Yes, I put the static ip into Twilio.

 

[cobaltit]

Twilio support should be able to tell why the call is forbidden since they are ones rejecting it.

 

[leejor]

Some providers will block "high value" calls unless you have previously approved them.

 

[cloidhamer]

Most likely it is rejecting it because the caller id you are sending doesn't match what is assigned to your trunk. You have to make sure that the Caller ID coming from 3CX matches the number assigned to the Trunk in Twilio. So in 3CX Navigate to your Twilio trunk -> CallerID-> Default caller ID -> Configure Outbound Caller ID. Make sure it has a "+" sign and the full number that is associated with the Twilio trunk. Also if you are assigning a DID to an extension then that needs to be their CallerID in Extenstion->Outbound Caller ID also with the "+" in front.