Expansion module option not available for Polycom IP 601

I’m using EPM 2.11.0.1.61

When going to EPM -> Extension Mapping -> Advanced

If you click advanced on a VVX 410 phone, the Expansion modules options appear. If you click advanced on an IP601 phone, they do not appear.

How can I enable them for 601? I’m pretty sure its a software patch that is needed but Not sure.

tia.