Aux ribbon cable port back of 5420? 1

[safenestvmem]

I just noticed what looks like a ribbon cable Aux port on the bottom of a DS5420.

I checked the docs and descriptions but found nothing.

Anyone know what this is used for?

Thanks

 

[Nortel4Ever]

That would probably be for the EU24 Expansion Module

 

[ipohead]

Just found one! The EU24 has a modified RJ45 port. The ribbon cable port is above that but as far as I can see it isn't labelled.