Showing results for 
Search instead for 
Did you mean: 

911 Calls fail on VVX/CX


911 Calls fail on VVX/CX

We have Polycom VVX and CX 5500 phones that cannot dial 911.  We use Lync for dialing plans which adds a + to 3 digit calls.  What is odd is dialing 411 works, just not 911.  Also the CX600 phones work fine calling 911, the + is added.  It appears it is something wrong with the configuration of the UC software.  We currently do not have dialing plans defined in the phone configuration file because Lync is handling it.   This works for everything except calling 911 on the VVX and CX5500 UC phones. 

Any advice is appreciated.  Thanks

Message 1 of 2
Polycom Employee & Community Manager

Re: 911 Calls fail on VVX/CX

Hello RonR,

welcome back to the Polycom Community.


You post has been moved to the right section

Again it is always useful to include the currently used UC Software version as issues experienced or a question asked may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes, Administrator Guides or FAQ post’s.

The above is also stated in the "Read First"

In addition the "normal" 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 or Digitmap issues

Resolution: Please check => here <=

The above will allow you to use logs on how to troubleshoot this.


If this fails please work with your Polycom reseller on getting support.

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

Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

The above is necessary in order to track issue internally within Polycom.

You are welcome to post more questions or configuration or logs for other community members to look at but if your issue requires a fix via Polycom you must go via the official support structure.

Please ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

Please remember, if you see a post that helped you , and it answers your question, please mark it as an "Accept as Solution".

This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
Polycom employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.
Message 2 of 2