Easy step-by-step guide: connecting QuestBlue account with 3CX.
Login to your 3CX online account.
Click Admin and select voice and chat.
Click Add Trunk button.
Under the General Tab, type in Generic in the Country field and Generic SIP Trunk in the Trunk menu.
Enter the Main trunk number and Registrar / Server number and click save.
Go to SMS tab and copy the webhook URL to the clipboard.
Login to your QuestBlue online account
Click Messaging select SMS Settings. Choose DID and click edit. A new window will pop up. Select 3CX Webhook in the dropdown menu and paste your 3CX URL you copied in the previous step.
Go to API Management / Manage API Access and copy 3CX API Key.
Return to your 3CX account and click Admin, click Voice & chat, and click SMS.
Enter the API key and sbc.questblue.com in the Provider URL field. Click save.
The last step: click Admin and select Users. Click Add user button. Enter your info and click save.
You are all done! To send SMS/MMS messages, go to chat, select the phone number, and start texting ♥