Ca't complete calls to some external numbers

Occasional Advisor

Ca't complete calls to some external numbers

 - Poly Trio 8800

 - UC Software Version:

 - s/n:  0004F2FFEA74

 - Skype for Business Online


Using the UI on the device, we are unable to make calls to certain toll-free/long distance numbers.Doesn't seem to be a common pattern.  Some 1800 & LD  numbers work, some don't.


Am I missing something obvious?


Message 1 of 3
Polycom Employee & Community Manager

Re: Ca't complete calls to some external numbers

Hello @fi85511 ,


Welcome back to the Poly Community.

Please ensure you always check the FAQ's and/or utilize the community search before posting any new topics or follow up posts.

Oct 7, 2011 Question: Phone unable to Dial a number when Off Hook or on 2nd Call in a Conference or Digitmap issues

Resolution: Please check => here <=




Jan 19, 2012 Question: How to troubleshoot Polycom VoIP related Issues?

Resolution: Please check => here <=




Jan 17, 2017 Question: How can I troubleshoot simple Skype for Business, Office365 or Teams issues?

Resolution: Have a look => here <=


If you still struggle please work with your reseller to open a ticket.

End Customers are usually unable to open a ticket directly with Poly support.


SCANSOURCE INC sold this Trio back in 17/03/2017

As the unit is no longer within the warranty please be prepared to Pay Per Incident / PPI. This is all outlined in detail here

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.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 3
Occasional Visitor

Re: Ca't complete calls to some external numbers

We've seen that issue before also. The fix for us was to have our SIP trunk provider block video codecs from their end. 

Message 3 of 3