How do I factory reset my ATA and re-provision it? How do I factory reset my Linksys or Cisco phone and re-provision it? How to peer an IP phone or ATA with Thinktel. How to reconnect your Linksys/Cisco phone to ThinkTel without factory resetting How to update your SIP password on a Linksys/Cisco phone that is not connected with our provisioning server. Provisioning Guides for Cisco and Linksys IP Phones