Trio 8800 Enable Line Key 4

Frequent Advisor

Trio 8800 Enable Line Key 4

I am looking for some assistance to enable a 4th line key on the Trio 8800. 


I am running them in SfB mode, so SfB is on line 1. I have line 2 setup for a SIP line to FreePBX, Line 3 is setup for Teams calling to RealConnect. 


Is it possible to scroll to the next screen and have a 4th line key option available? 

Message 1 of 3
Esteemed Contributor

Re: Trio 8800 Enable Line Key 4

Hi @


just put this into a txt file and save it as cfg. Import it to the Trio and you will have a 4th line. But be aware, Trio officially supports only 3 lines in Hybrid Mode! But works fine for me!  

<reg.limit="4" />

Message 2 of 3
Polycom Employee & Community Manager

Re: Trio 8800 Enable Line Key 4

Hello @mshu  and @SR_MCSE ,


Welcome back to the Poly Community.


The Trio supports officially 3 registered lines. You can add more unregistered lines.


Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier


If official support is required please check how to phone or open a case here

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


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Please also ensure you always check the VoIP , Video Endpoint , Microsoft Voice , PSTN or other FAQ's in the different sections
Message 3 of 3