Hi andrewsevo,
Thank you for using the Support Forum. Please take a look at the tips for correcting slow printing. Also try the solutions for slow print. If none of this helps please consider contacting your support centre for further assistance.
When trying to print more than one page at a time, our 6515 keeps "stalling" between every page, it will print a page, then it will sit doing nothing for between 30 seconds and a minute before the next page starts printing.
I've tried power cycling the device as well as the machines used to send the print jobs, uninstalling drivers and installing fresh ones, using different drivers, using both wired and network connections, restarting Windows print spooler, all to no avail.
Any assistance to get this machine printing at a rate of above 1 page per minute would be appreciated.