Yep! The VVX series have a lot of basically duplicate phones. i.e. the VVX 400/401/410/411 are all the same. I can't remember which are which, but some are gigabit versions. The fact that the phone is gigabit obviously doesn't matter for phone calls; however, if you're using the phone as a switch passthrough to a computer because you only have a single ethernet drop then it's important.
The x01 & x11 models are just newer revisions of the original x00 & x10 models, they have more memory and a faster processor to fix some of the "sluggish" UI issues that were creeping up. The x10 & x11 are the Gigabit models and the new VVX 401 & 411 phones have a USB port behind the screen like the VVX 5xx & 6xx series phones so you can add a USB stick for local call recording.
Polycom VVX 601
in Provisioner Service
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The x01 & x11 models are just newer revisions of the original x00 & x10 models, they have more memory and a faster processor to fix some of the "sluggish" UI issues that were creeping up. The x10 & x11 are the Gigabit models and the new VVX 401 & 411 phones have a USB port behind the screen like the VVX 5xx & 6xx series phones so you can add a USB stick for local call recording.