Zyxel SP300E printer connected to N4100

rob99fla

I installed a ZyXEL N4100 with the SP300E ticket printer a back in 2014 before I retired. All has worked well since. I recently bought off eBay a (so they said) new SP300E printer as the old one was getting faint. How do I set the IP address of the printer? I did see this once but can't remember how to access the printer. It give communication error when connected. The old one works OK. Any help appreciated. In the N4100 wizard the IP address shows as 192.168.1.7

Blabababa

Found some hints from website:
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=013675&lang=EN
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=013225&lang=EN
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=010046&lang=EN
https://kb.zyxel.com/KB/searchArticle!viewDetail.action?articleOid=013016&lang=EN