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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?




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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

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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