ESR-Series Documentation EN Archive ESR-Series. Firmware version 1.13.0 ESR-Series. User manual. Firmware version 1.13.0 Current: ESR technical support. Firmware version 1.13.0 ESR technical support. Firmware version 1.13.0 For technical assistance in issues related to operation of Eltex Ltd. equipment, please contact the Service Centre.Feedback form on the website: http://eltex-co.com/support/Sevicedesk: https://servicedesk.eltex-co.ru/Visit Eltex official website to get the relevant technical documentation and software, benefit from our knowledge base, send us online request or consult a Service Centre Specialist in our technical forum:Official site: http://eltex-co.com/Technical forum: http://eltex-co.ru/forumKnowledge base: https://docs.eltex-co.ru/display/EKB/Eltex+Knowledge+BaseDownload center: http://eltex-co.com/support/downloads ×