Cisco SPA500DS Quick Start Manual page 4

Locate the AUX IN port on the back of the Cisco SPA500DS.
S 8
TEP
Connect one end of the auxiliary cable to this port.
Locate the AUX port on the back of the Cisco SPA500 Series IP
S 9
TEP
Phone. Connect the other end of the auxiliary cable to this port.
The Cisco SPA500DS is powered by the auxiliary cable with the
Cisco SPA500 Series IP Phone; no additional power source is
required.
Route the auxiliary cable inside the cable slot of the Cisco
S 10
TEP
SPA500DS.
4 Cisco SPA500DS