Plantronics Product Update: Plantronics Calisto 620 End of Life (EoL) Notice End of Life (EoL) Notice: Calisto 620 Speakerphone Poly (formerly Plantronics) has announced that the Calisto 620 Speakerphone is going end of life. The last order date will be April 30, 2020 and the last ship date will be May 29, 2020, or while supplies last. For replacement products, see info below. Discontinued: Plantronics Calisto 620 speakerphone Replacement: Plantronics Calisto 5300 speakerphone Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website