Will the EPG600 work behind a PBX? EnGenius Admin Updated December 10, 2018 17:23 Follow Yes, the RJ11 ports on the EPG600 will work with analog ports from a PBX. http://community.engeniustech.com/topic/735-will-the-epg600-work-behind-a-pbx/ Related articles What is Guest Network? Will using EnTalk to make PSTN calls make the phone line unusable to other users? How to set up a guest network on an EAP600/ECB600? Comments 0 comments Please sign in to leave a comment.