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Reusing IP 550 phones from 8x8

Occasional Visitor

Reusing IP 550 phones from 8x8

We recently moved our phone service in-house from 8x8 and we are reusing the phones from 8x8. These phones are IP 550. Before we can reuse the phones, I reset the phones to factory defaults and now I am getting strange behavior.

When I try to dial an extension like 11x or 10x, I get the a busy signal. If I do not pickup the handset, enter the number and press dial, it works. This only happens when I pick up the hand set and then try to dial.




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Polycom Employee & Community Manager

Re: Reusing IP 550 phones from 8x8

Hello rxm,

welcome to the Polycom Community.

The community's VoIP FAQ contains this post here:

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

Resolution: Please check => 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

Polycom Global Services

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.


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
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