Hello tom21,
welcome to the Polycom Community.
There is no such feature that you can directly enable but have a look at the Polycom Desktop connector.
This software allows you to use a mouse and a keyboard with the VVX so you could copy and paste a number.
The rest is already discussed in this post and others.
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