Plantronics + Polycom. Now together as Poly Logo

External number not showing after call transfer

Occasional Contributor

External number not showing after call transfer

Hi all,


Hope you can help.


When an external calls comes in to a VVX 400 phone the external CLI shows. However, if the call is to be transfered then the external CLi is not showing on screen - it only shows the extenstion of the phone that transfered that call?


Has anyone any idea if this a firware issue on the VVX 400 phone?




Message 1 of 2
Polycom Employee & Community Manager

Re: External number not showing after call transfer

Hello Mike,

welcome to the Polycom Community.

It is always useful to include the currently used software version as issues experienced may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes.

Therefore the Polycom VoIP FAQ contains this post here:

Question: How can I find out my SIP UC Software Version or the BootROM Version of my Phone?
Resolution: Please check here


We would need to see the call signaling in order to determine if the number is actually presented to the phone.


The FAQ contains various troubleshooting sections that should help you.

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

<======== Signature / Disclaimer ========>
Please be aware:For questions about the type of support to expect please check here

Please also 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".

The title Polycom Employee & Community Manager is an automatic setting within the community and any forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
Poly 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 maybe answered on weekends, bank holidays or personal holidays.
Message 2 of 2