There is no "printer" cable that fits both systems.
Serial printers that I have seen are DB25 but I doubt you are using a serial printer. Are you doing SMDR? A female DB9 is for a PC com port.
The 1428 has a DB25 and the 2856 has a RJ45. If you are using the RS232 expansion module it has both RJ45 & RJ11.
You will need to be more specific.


- Dave S. -

You can never appease your ideologue opponents.