Poly Edge E550 vs CCX 400: which to buy?

Choosing between the Poly Edge E550 and the Poly CCX 400? Here's how they differ on platforms, audio and price, and which one fits your room.

Short answer: pick the Edge E550 if you want the one that costs $35 less. Pick the CCX 400 if you want the one that also supports Teams.

Both are appliance desk phones; the difference is screen and price.

Side by side

	Edge E550	CCX 400
Price	$298	$333
Platforms	—	Teams
Display	5" color IPS LCD, 800 x 480, RGB status lightbar	5" color multi-touch LCD, 720 x 1280
Power	13 W max; optional 5 V 3 A adapter sold separately	13 W max
Warranty	1 year limited	1 year limited
Line keys	12 line keys, up to 48 assignments (34 SIP lines)	—
Headset ports	1 RJ-9, 1 EHS port (optional APP-51 adapter)	1 RJ-9, 1 EHS port
Audio	Poly HD Voice, NoiseBlockAI (speakerphone), Acoustic Fence (handset/headset)	—
Microphone response	150 Hz to 14 kHz	150 Hz to 7 kHz
Codecs	G.711, G.722, G.722.1, G.729AB, iLBC, Opus	G.711, G.722, G.722.1, G.729AB, iLBC, Opus
Versions	—	Microsoft Teams (848Z8AA) or open SIP (849A1AA)
Connections	Wireless: Bluetooth 5.0, dual-band Wi-Fi, NFC; Network: 2 x Gigabit Ethernet (RJ-45), PoE IEEE 802.3af Class 4; USB: 1 x USB-C 2.0 (media, storage, headset, expansion module)	Network: 2 x Gigabit Ethernet, PoE IEEE 802.3af (Class 0); USB: 1 x USB-A 2.0 (media, storage)

Specs are Poly's published figures. Prices can change.

Screen: Edge E550: 5" color IPS LCD, 800 x 480, RGB status lightbar. CCX 400: 5" color multi-touch LCD, 720 x 1280.
Platforms: the Edge E550 lists no certifications; the CCX 400 lists Teams.

Choose the Edge E550 if you want the one that costs $35 less. See the Edge E550
Choose the CCX 400 if you want the one that also supports Teams. See the CCX 400