VoIP Trunks (also referred to as SIP Trunks) can be used to achieve a significant reduction in outbound toll rates when calling long distance or internationally. They can also be used to link or trunk two systems together so you can call another location as if you were in the same office.
To add a VoIP Trunk:
- Select your provider from the "Add Phone Lines" drop down list. If your provider is not listed, select "VoIP-Generic"
- Enter your Account ID and Password (not required for IP Only)
- Click the "Advanced Options" check-box to show advanced options
- Set the "Proxy Address" (also referred to as SIP Proxy or Inbound Proxy)
- Select the appropriate "Auth Type"
- To the right of the window, under "Inbound Calls" you can enter any DIDs and set a destination for them.
- Click "Save"
|Auth Type||Credentials based authentication requires an Account ID and Password that is provided by your VoIP provider. IP Only authentication can be used if your provider supports this method. Do not use IP Only authentication if you have a dynamic IP address.|
|Proxy Address||This is the inbound VoIP/SIP proxy that you will register to and receive calls from.|
|DTMF Mode||DTMF (Dual Tone Multiple Frequency) are the audible tones that you hear when pressing a key. This setting specifies how your provider is expecting to receive these digits. RFC 2833 is a standard for VoIP.|
|Caller ID Mode||Passthrough enables you to set the Caller ID to anything you want when placing an outbound call. If your VoIP provider does not allow you to do this, you will select "Account".|
|Heartbeat||Also refereed to as "Keep Alive", this can help maintain SIP registration and NAT traversal. Select how often in seconds to send the SIP OPTIONS message to the VoIP provider.|
The outbound VoIP/SIP proxy address. Some VoIP providers require you to use a separate proxy for outbound calls.
Outbound Number Translation
The outbound number translations provide a method to change the number as dialed to match requirements met by your provider. You can prepend or remove digits from a dialed number before it is handed to the provider. For instance your provider may require a 1 even if you are doing a 10 digit number. Numbers will show up after the provider has been referenced in the outbound dialmap. Below are a few examples of how to modify the dialed number:
- Striping the first digit from the beginning of the dialed number:
- Adding a 1 to the number dialed:
- Adding the area code 949 to the dialed number:
Here you will enter the DIDs you have with your VoIP Trunk. At first you will only be presented with one line to enter a number; however, as you click on the "Description" of "Number" field, an additional line will show up below. Each DID will be entered with the following options:
|Description||The description field is used to identify the DID. When calls are received, the caller ID name will be prepended with the description you enter.|
|Number|| The 10 digit (US and Canada) DID number without any special characters like spaces or hyphens. You can also use standard Asterisk pattern matching. For example,
|Send Calls To||Select the type of target that calls will be routed to, when the corresponding number is dialed, from the list of available options. For example, to route inbound calls to an extension group, select "Extension Group".|
|Location||Select the specific resource that you want inbound calls to route to. If you selected "Extension Group" to "Send Calls To", you would select the specific extension group number here.|