Hello FDS,
Any interoperability testing would have been done by Avaya to ensure our Phones are compatible with their SIP PABX.
I must admit I have not personally seen a VVX1500 running such an old software.
Upgrading this VVX1500 would be your first task but there are certain caveats.
The Feature Descriptions & Technical Notifications for SoundPoint IP, SoundStation IP, Polycom VVX 1500, SSDuo Phones and SL8400 Handsets page => here <= contains the Technical Bulletin 53522 Upgrading the Polycom® VVX™ 1500 Phone to SIP 3.2.2 => here <=
Once you upgraded to this Software I suggest you upgrade to UC Software 5.1.2
You can actually purchase a H.323 license as this VVX most likely is not a VVX1500D which has a Dual Stack SIP / H.323 license already present.
Please ensure you always check the community FAQ and/or utilize the community search before posting any new topics or follow up post’s.
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
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The title Polycom 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. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
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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
