Skype & Silk Codec

Occasional Contributor

Skype & Silk Codec

Has anyone tried out the (experimental) SILK codec in the Polycom Trio (software 5.5.2)?


Does the SILK codec work with calls using Skype for Business Online / "Microsoft Calling Plan"? (We've only been able to get S4B Online to use the G.711 codec, unfortunately.)



We're hoping this will come to the VVX 501/601 series phones soon!

Message 1 of 3
Karthik  Sivaram
Polycom Employee

Re: Skype & Silk Codec

hi Semenko,


As the name says it  - "Experimental" .Not all features are likely to work or tested with this audio codec. The SILK codec is disabled by default on the Trio . You can read more about it on Pg 10 of  the firmware  5.5.2AC release notes .

The official supported codec list for the Trio as per the datasheet is G.711 (A-law and μ-law)  &  G.722 :

Hope this Helps!

Karthik Sivaram

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Message 2 of 3
Polycom Employee & Community Manager

Re: Skype & Silk Codec

Hello all,

The Silk codec is now supported on the Trio running UC Software 5.5.3 and compatible VVX phones running software 5.7.0.

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

Best Regards

Steffen Baier

Polycom Global Services


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 3 of 3