T21p-e2.bin !!top!! Link

Yealink SIP-T21P E2 - Dual-line Entry level IP phone - Voice Communication

If you have encountered this file on your network or PC and do not own any Yealink T21P E2 phones, it is possible you downloaded a file by accident or through a misconfigured auto-provisioning URL. In that case, you can safely delete it. But if you are a VoIP administrator, treat t21p-e2.bin with the respect it deserves – it keeps your calls connected. t21p-e2.bin