CEHS-SH 01 cable The CEHS–SH 01 cable for electronic hook switch is ideal for all users of professional wireless headsets, in combination with one of following EHS-compatible ShoreTel desk phones: IP 212k IP 230/230g IP 265 IP 420 IP 480/480g IP 485 IP 560/560g IP 565/565g IP 655 This cable is an enhancement for any contact center or corporate office environment.