hl7 Messages option in admin?

Is there any manual which shows how to use openMRS hl7 messaging in latest standalone version. There are few options in the admin module regarding hl7 messages. I want to push/pull data using hl7 messages in openMRS.

Did you get a chance to look at this? https://wiki.openmrs.org/display/docs/HL7Query+Module

https://wiki.openmrs.org/display/docs/HL7

https://wiki.openmrs.org/display/docs/Custom+HL7+Handlers

https://wiki.openmrs.org/display/projects/Improvements+to+the+HL7Query+Module