Hello Bruce,
welcome to the Polycom Community.
Could I kindly ask you the next time not to simply respond to any existing post if the topic is unrelated or unconnected ?
I have moved this reply and created a new topic for this.
Many parameters like call.ringBackTimeOut cannot be configured via the Web Interface or are only added to later software versions.
The community's VoIP FAQ contains this post here:
Mar 08, 2013 Question: Where can I download configuration files from or create these myself?
Resolution: Please check => here <=
The above in addition to the Admin Guide explains how to create your won configuration files and utilize a provisioning server to load these.
For these older legacy phones the parameter is most likely part of the sip.cfg or phone.cfg
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
