Wired Intelligent Edge

Is the J9478A module compatible with the 5406 ZL (J8697A) switch?  I'm looking for a 10/100 POE module since our IP phones don't have gigabit ports so I wanted to know if I can use that instead of the  J8702A.

Thanks for any help.

Yes, that 10/100 module is compatible.  However, there's no harm in using a Gigabit module either (it'll just operate at 100Mbps) and it'd provide you more flexibility in the future in case of newer phone models supporting Gigabit or you need the ports for other purposes aside phones (802.11n/ac access points, for example).