Existing Trunk List

From Bizfon Wiki

Purpose

Trunks are used to receive or send calls to devices that are not registered with the PBX. The name trunk comes from the idea that there is a physical connection between the PBX and the external device, like it used to be with traditional PBX.

In general, there are three types of trunks:

• Registrations. The PBX registers somewhere else and itself like an extension. This model is typically used when you have an account with an Internet Service Provider and you use this account for terminating your traffic. In this model, the PBX uses the number of the registration as caller-ID, regardless what extension is actually using the trunk. You can use this mode if the service provider supports SIP soft- or hard phones.
• Gateway. The gateway model does not register; it just sends the traffic to the destination. In this model, the PBX uses the caller-ID of the PBX to indicate the extension that initiates an outgoing call (if that extension did not turn block caller-ID on). This model is typically used with customer premises PSTN gateway hardware.
• Proxy. The proxy model is similar to the gateway model. The difference is the way anonymous calls are made and how the proxy represents its own domain. As the name suggests, the proxy model assumes that you are talking to a SIP proxy, while the gateway model assumes that you are talking to a SIP user agent. However, the two models are quite similar.

Trunks are usually in scope of a domain. But you can also make a trunk visible in all domains. For example, if you want to share a PSTN gateway amongst all domains, you would set up a trunk in a separate domain and make it visible to all domains.

Existing Trunks

In the trunk list, you can see which trunks are available in the current domain. If the trunk is a registration, the PBX will show the registration status. To force a re-registration of this trunk, you may click on the register link.

To delete a trunk, you may click on the delete icon. To edit the details of a trunk, you can click on the edit icon.

At the bottom of the page you find a form for creating a new trunk. Trunk names may include alphanumeric characters and space. The system assigns a number to each trunk, so that it is ok if different domains choose the same name for a trunk.