STIR/SHAKEN on pre-6.4 Firmware on Polycom phones

Voiponaught2024 · ‎03-21-2025

Hi, we have noticed that older phones (that can only be upgraded up to 5.9.8 UC version currently) would show verstat tags in Caller id when STIR/SHAKEN is used (i.e. verstat header is present in the INVITE reaching the phone, something like "verstat=TN-Validation-Passed"); in some cases the caller's number is saved on the phone, but not necessary.

I recall Stir Shaken support was only added in 6.4, thus all stirshaken parameters wouldn't be applicable for VVX phones running earlier firmware. I realize those phones are old and might be reaching their end of life, however there are plenty of those in the field. I'm wondering if there's a way to at least disable S/S (showing verstat headers) for those?

I can reach out to HP/Poly support if needed to get an answer.

SteffenBaierUK · ‎03-21-2025

Hello @Voiponaught2024 ,

Welcome back to the HP Poly community.

From a quick look I can see this was only added to Phones running 6.4 or later.

Older legacy phones cannot use this and the server / SBC would need to strip this out before it is send to the phone.

Best Regards

Steffen Baier

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