| Features | | AudioCodes 420HD | |
|
| |  | |
| Additional Information | | | |
| Initial Release | | 4.0 SU5 | |
| Authentication | | yes | |
| Auto Answer | | yes | |
| Blind Transfer | | yes | |
| Call and Line Appearances | | | |
| Call Appearances per line | | 8 | |
| Line Appearances | | 2 lines on phone - Only 1 line configurable in CIC | |
| Call Deflection | | | |
| Forward All | | yes | |
| Forward Busy | | yes | |
| Forward No Answer | | yes | |
| Call Waiting | | yes | |
| Can be used with Interaction Client | | yes | |
| Codecs | | | |
| Additional Codecs | | Opus | |
| G.711alaw | | yes | |
| G.711ulaw | | yes | |
| G.722 | | yes | |
| G.723.1 | | no | |
| G.726 | | no | |
| G.729AB | | yes | |
| GSM | | no | |
| Opus | | yes | |
| RFC 3389 (VAD/CNG) | | yes | |
| Color LCD Screen | | no | |
| Conference | | yes | |
| Consult Transfer | | yes | |
| Delayed Media | | yes | |
| DHCP | | yes | |
| Dial Plan Capabilities | | | |
| Dial Plan Routing | | yes | |
| Dial Plan Termination | | Configurable(Default - #) | |
| Do Not Disturb button | | DND on phone, does not sync to CIC status | |
| DTMF | | | |
| Inband | | yes | |
| RFC 2833 | | no | |
| Expansion Module(s) / Sidecar(s) | | no | |
| Headset Jack | | yes | |
| Hold | | yes | |
| Inline Power | | | |
| 802.3af | | yes | |
| Cisco Inline Power | | yes | |
| Interaction Center Integration | | | |
| Call Park | | yes | |
| Group Pickup | | yes | |
| Shared Line Appearances / BLA | | no | |
| Latency | | | |
| Always in | | yes | |
| Dynamic | | yes | |
| Missed Call Indication | | yes | |
| Mute | | yes | |
| MWI | | yes | |
| NAT Support | | no | |
| Network Interface | | Gig E | |
| Proxy Capabilities | | | |
| Backup Proxy | | yes | |
| Outbound Proxy | | yes | |
| RFC 3263 | | yes | |
| QoS | | | |
| DSCP | | yes | |
| Re-Invite Support | | yes | |
| Redial Button | | yes | |
| Ringer Selection | | yes | |
| RJ45 Jack for PC | | yes | |
| Signal / Audio | | | |
| SRTP | | Requires firmware version 2.2.16.142.12 or newer. | |
| TCP | | yes | |
| TLS | | Requires firmware version 2.2.16.142.12 or newer. | |
| UDP | | yes | |
| Speakerphone | | yes | |
| Speed Dial Buttons | | There is no dedicated Speed Dial button, Requires configuration of Digits | |
| Supported Ports | | | |
| USB | | no | |
| Termination Character | | Configurable(Default - #) | |
| TFTP/FTP configuration | | Supported by Phone | |
| Voicemail button | | yes | |
| Volume Control | | yes | |
| Web server Configuration | | yes | |
