cisco ip phone interoperable with sccp

{"cid":"91159203","title":"CP-7821-K91 Year Cisco IP Phone Interoperability MGCP Voice Features Call Hold","imgUrl":"https:\/\/img.ismap.com\/nimg\/c2\/47\/617a778e7c53a5c5ce48834bd7c8-200x200-1.jpg","attrs":{"Brand Name":"Cisco","Model Number":"CP-7821-K9","Delivery Time":"2-3 days","Place of Origin":"china","Certification":"CE","Resolution":"480 X 272CP-7821-K9","Power":"802.3af PoE, USB, Local Power Supply","Warranty":"1 Year","Audio Support":"MP3, WAV, AAC","Security":"TLS, SRTP, HTTPS, 802.1X, AES, SHA-256","Video Support":"H.264, H.263, H.261CP-7821-K9","Expandability":"Bluetooth, USB, Wi-Fi, Headset Jack","Voice Features":"Call Transfer, Call Hold, Call Forward, Call Waiting, Call Park, Call Pickup, Three-Way Calling, Do Not Disturb, Speed Dial, Redial, Mute, Volume Control, Voice Activity Detection, Comfort Noise Generation, Acoustic Echo Cancellation"}}