I've had this problem before but can't remember how to resolve it! Trying to conference in a third party on a SoundStation IP 7000 but when trying to conference in a third party, get back dial tone after dialling the number.
Any ideas please? We're using Mitel MN3300, have resolved in the past but can't remember the resolution :-(
Hello alison,
welcome back to the Polycom Community.
I had already replied => here <= but you never followed up on this.
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