WTH is this mystery device in iMac??

[PracticalMac]

iMac G5 first version.

I was looking for the BlueTooth module.

I find something else that looks like a wireless module, but its neither BT or WiFi, so WTH is it??

IN the below image what is the black taped item partly under the Wi-Fi card?? The Wi-Fi is on upper-center, BT is bottom, slightly left (4 copper squares).
(printing on it has government tele-com labels all over it)

(Edit)

.... Is it modem???
Damm, been so long, completely forgot that possibility!

 

[Intell]

From top to bottom, Airport card, dialup modem (covered in black), Bluetooth.

 

[xraydoc]

Yep. Especially since there's a two conductor RJ-11 connector right there in your picture


Wow... A modem. Haven't seen one of those in a long time. Really!