Upgrading to V15 with a Multi Line PSTN Gateway

Upgrading to 3CX V15 with a multi line PSTN GatewayIn previous versions of 3CX the phone system was in charge for multi port gateways (ISDN or FXO) to hunt for the PSTN ports. However, after the firmware of the vendors became more capable, 3CX abandoned the idea of multi trunks per single gateway and instead let the gateway build hunt groups over all available ports. The result is a faster outbound call processing and simplified DID management.

We have prepared a simple document which outlines the steps which need to be taken prior to upgrading to V15 in case your 3CX installation still has PSTN gateways in place which feature more than one SIP trunk per device (e.g. Patton). Read the guide.

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  1. Daniel Mayer

    What are we supposed to do in the instance we need the individual lines to show up in 3CX? We have at least one customer with inbound that is dependent on individual lines on their PSTN gateway, and have a couple for outbound. The outbound might be fine on the gateways we are using as we can call up specific ports using dial codes, but still not the best way if we can use what we are doing now.

    August 12, 2016 at 3:19 pm
    • @Daniel, there is not much of a change it self, as for outbound you could also only select the “Gateway” but not the trunk. So no change here. For inbound, it only looks different. Add below the one Gateway/Trunk all DIDs you have on any of your PSTN lines and we will route it as before. As you can see, it is the same as before but different… If you have the need to address the Ports of the gateway individually you can contact the manu. of the gateway and ask for a custom config which would target ports based on a prefix. However this is not covered by the 3CX support but doable!

      August 16, 2016 at 10:21 am