g 729ab voice codecs cisco ip phone

{"cid":"91159203","title":"CP-8811-K9 Cisco IP Phone 10\/100\/1000 Ethernet Voice Call Park Communication Phone","imgUrl":"https:\/\/img.ismap.com\/nimg\/51\/33\/3e77fc099968fad9b1f512d1bac0-200x200-1.jpg","attrs":{"Brand Name":"Cisco","Model Number":"CP-8811-K9","Delivery Time":"2-3 days","Place of Origin":"china","Certification":"CE","Connectivity":"Ethernet 10\/100\/1000","Power":"802.3af PoE, USB, Local Power Supply","Voice Codecs":"G.711, G.729a, G.722, G.722.1, G.722.1C, G.729ab, ILBC, ISAC, OPUS","Resolution":"480 X 272","Warranty":"1 Year","Expandability":"Bluetooth, USB, Wi-Fi, Headset Jack","Security":"TLS, SRTP, HTTPS, 802.1X, AES, SHA-256","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"}}