What is the purpose of the second wifi network on board (some?) B787 aircraft? I recently flew for the first time on a Boeing 787-8 Dreamliner, registered A7-BCY. This aircraft had the universal symbol for wifi externally displayed beside the entrance door, and as wifi on an aircraft was another first for me I was keen to try it out. Which I did, without much fanfare.

The wifi used to provide internet access was named along the lines of "OneAir", which is consistent with the name of that airline's connectivity/On-board entertainment services.

What intrigued me was that there was a second wifi network available (albeit secured from public access) which was named with the aircraft's registration "A7-BCY" in the SSID of the network. 

What is the purpose of this network? What data would you be able to access/see if you were to connect to it using a laptop (for example)? 

(Note: I know there have been some questions here and on computer security regarding the vulnerability of modern airliners to hackers - I'm less interested in "doomsday scenarios" with this technology, and more interested on what legitimate uses there are of this network)
I think it has to do with the use of IPads by mainly the cabin crew, according to this article:

It also helps to identify customers quickly, and can be used to alert other staff of a passenger’s special meal or service requirements.

In order to have to crew communicating to each other via the IPad they need to be connected somehow, so I guess that the network you see is just linked to a locally hosted server such that all the IPads can acces the same data even if a crew member makes a change.