Thank you for using the Support Forum. I have looked through the documentation for the machine and I see where you can change the transmission speed but not the ECM. If the technician says it cannot be done they are probably correct. Please consider contacting your support centre to see if there is another way to contact if to VOIP for further assistance.
Thanks, CherylO-Xerox Community Manager
Be sure to click Kudos for those who have helped you. Select Accept as Solution for posts that have helped to solve your issue(s)!