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  3. What if My PBX Goes Down?
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  2. PBX/SIP Trunking
  3. What if My PBX Goes Down?

What if My PBX Goes Down?

PBX is dependent upon Internet connectivity and power; without these, a PBX can go offline.  Nextiva offers a fail-over method for Nextiva trunking customers that will automatically forward phone calls to your PBX to another SIP service or external phone number after one hour.

Nextiva calls this option an “Alternate Forwarding Phone Number” that will automatically become active within an hour if a PBX’s registration has gone offline.

To set up your Alternate Phone Number, you must first log into your Trunking Portal.

To log into your SIP Trunking Portal, go to and select the Login button in the upper right hand corner of the page.

  1. 1.) Once logged into your Trunking Portal, select the device for which you wish to set up an alternate number.
  2. 2.) Next, select Edit under the Device Options section.
  3. 3.) Input the Alternate Forwarding Phone Number that is desired.  Then, after 1 hour of losing registration with Nextiva’s SIP trunking servers, the Alternate Forwarding Phone Number will become active and begin forwarding phone calls.

If you have any questions directly ask an Amazing Service Team member here or email us at

Updated on December 29, 2016

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