CEHS-CI 02 cable The new CEHS-CI 02 cable is ideal for all users of professional headsets, in combination with one of following EHS-compatible Cisco desk phones: Cisco 8900 series* Cisco 9900 series This new cable is an enhancement for any contact center or corporate office environment. It has been specially designed to make calls convenient to manage – thanks to easy set-up, single-button operation as well as efficient and flexible answering/ ending of calls.