Best Polycom IP Phones with Redial Button

Positives: Protocol: TFTP,HTTP,DHCP, Codec: G.729A,G.168 (Echo Cancellation),VAD (Voice Activity Detection),CNG (Comfort Noise Generation),G.729AB,G.711u,G.711a, Networking Connectivity: 2 x RJ 45 - 10/100 Base-TX (Ethernet), VoIP Signaling Protocol: SIP

Positives: Protocol: TFTP,HTTP,DHCP, Codec: G.722, Networking Connectivity: 2 x RJ 45 - 10/100 Base-TX (Ethernet), Additional Features: Hand Free Mode,Speaker,Mute,Volume Control

Positives: Protocol: TFTP,DHCP, Codec: G.723.1,G.729A,G.711u/A, Buttons: Headset Volume,Speakerphone Volume,Redial,Mute,Headset / Hand Free,Hold,Transfer,Conference, Display Type: Monochrome LCD

Positives: Networking Connectivity: 1 x PBX Interface (RJ 11), Additional Features: Call History, Buttons: Speakerphone Volume,Redial,Mute,Hold,Conference, Display Type: Monochrome LCD

Positives: Protocol: RTCP,HTTP,FTP,TFTP, Codec: G.729A,G.722, Networking Connectivity: 2 x RJ 45 - 10/100 Base-TX (Ethernet), VoIP Signaling Protocol: SIP