Cisco SPA 504G Owner's Guide

3. Select either the “Line activation” or “Phone activation” section, place a
check in the box next to the items you wish to activate, and press the Save
changes button.
NOTE- You will activate all of your lines at once, so if there is no
“Activate Lines” button, then you have already activated the lines.
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Cisco SPA 504G Specifications

General

Lines	4
Protocols	SIP, SPCP
Speakerphone	Yes
Ethernet Ports	2 (10/100 Mbps)
Power over Ethernet (PoE)	Yes
Voice Codecs	G.711, G.726, G.729
Headset Port	Yes (2.5mm)
Display	Monochrome LCD