[Observium] Add ignore iftype

I have many of the following ports on Cisco voice routers with PRI voice lines. I would like add them to the ignore list but everything I try will keep finding them. Am I missing something?

This is from the snmpwalk. ifDescr.536 = STRING: EFXS 50/0/400 *** this one router has 400+ of them and they all show up in the router ***

ifDescr.537 = STRING: Voice Encapsulation (POTS) Peer: 20208 *** Same here many show up on each router ***

Some of the lines I have added to see if it will ignore them. But no luck. $config['bad_iftype'][] = "EFXS"; $config['bad_iftype'][] = "EFXS 50/0/1"; $config['bad_if_regexp'][] = "EFXS.*";

Thanks for any help.