Setting up a 3CX SIP Trunk

Setting up a 3CX SIP Trunk

3CX SIP Trunk - Registration Settings

Use the following settings for registering/configuring a 3cx SIP Trunk:

General Tab

  1. Trunk Details
    1. Name: Lucid Technologies
    2. Registrar/Server/Gateway Hostname or IP: {Your Service Domain}.21917.service
      1. Port: 5060
    3. Outbound Proxy: 21917.hpbx.outboundproxy.com
      1. Port: 5060
    4. Number of SIM Calls: {Enter The Number Of Simultaneous Calls}
  2. Authentication
    1. Type of Authentication: Register/Account based
    2. Authentication ID (aka SIP User ID): SIP User
    3. Authentication Password: SIP Password
      Note: Authentication ID and Password will be provided by Lucid Technologies


  1. 3 Way Authentication: Uncheck
  2. Route calls to:
    1. Main Trunk No: Caller ID/DID assigned (e.g. 9009991234)
    2. Destination for calls during office hours: Extension (then choose extension from drop-down menu)
    3. Destination for calls outside office hours: Extension (then choose extension from drop-down menu)


DID Tab

  1. Numbers must be listed in 10 digit format. Do not include the 1


Note: The 3CX's template for our platform uses "From User" under Caller Name. This is to avoid an issue where calls to the PBX without a Display Name will show the Display Name as blanks on the phone. Otherwise, selecting "From: Display Name" will force the PBX to use the CID Name on the Display Name of the phones. Please use the setting that is appropriate for your setup.


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