| General |
| Feature/Functionality | 10/100 | 10/100 | 10/100/1000 | N/A |
| Intergral Switch | high-resolution 2.5-inch (240x120-pixel) grayscale display with white backlighting | high-resolution 3.5-inch (396x162-pixel) grayscale display with white backlighting | high-resolution 3.5-inch (396x162-pixel) grayscale display with white backlighting | Two 3.5-in (9-cm) grayscale backlit LCD displays, 160 x 270 resolution |
| Display | No | No | No | N/A |
| Integrated Video | No | No | No | N/A |
| Touch Screen | No | Yes | Yes | N/A |
| Speakerphone | 2 | 4 | 4 | 14 physical keys; Second “page” of 14 keys
via software = total of 28 keys per module |
| Number of Line keys | 4 | 4 | 4 | N/A |
| Programmable (Soft) keys | 6 | 11 | 11 | 2 – Page 1 and Page 2 keys |
| Fixed Feature Keys | Provides call pickup (CP), speed dial (SD),
and busy lamp field (BLF) support via XML
configuration |
| Advanced Features | Yes | Yes | Yes | N/A |
| Handsfree | Yes | Yes | Yes | N/A |
| Message Waiting Indication | Yes | Yes | N/A |
| Third Party XML Support | Yes | Yes | Yes | N/A |
| Headset Port | SIP | SIP | SIP | N/A |
| Signaling Protocal | Yes | No | Yes | N/A powered by phone |
| 802-3AF | No | No | No | No |
| Cisco Power | Class 2 | N/A | Class 2 | N/A |
| PoE Classification | Yes | Yes | Yes | N/A |
| DHCP | Yes | Yes | Yes | N/A |
| 802-1p/q |
G.711 (A-law and-law), G.722.2, G.722,
G.729a, G.729b, G.729ab, ILBC, iSAC,
OPUS | G.711 (A-law and-law), G.722.2, G.722,
G.729a, G.729b, G.729ab, ILBC, iSAC,
OPUS | G.711 (A-law and-law), G.722.2, G.722,
G.729a, G.729b, G.729ab, ILBC, iSAC,
OPUS | N/A |
| Codecs |
| |
| | Not for Cisco Call Control. third-party
hosted call control only (Asterisk 1.8+;
Broadsoft 19sp1, 20sp1, 21sp1; 22sp1;
Centile Istra SP 9.2; Metaswitch 9.3) | No for Cisco Call Control. third-party hosted call control only (Asterisk 1.8+; Broadsoft 19sp1, 20sp1, 21sp1; Centile Istra SP 9.2; Metaswitch 9.3) | No for Cisco Call Control. third-party hosted call control only (Asterisk 1.8+; Broadsoft 19sp1, 20sp1, 21sp1; Centile Istra SP 9.2; Metaswitch 9.3) | No for Cisco Call Control. third-party hosted call control only (Asterisk 1.8+; Broadsoft 19sp1, 20sp1, 21sp1; Centile Istra SP 9.2; Metaswitch 9.3) |
| Supported Cisco Call Control Platform(s) | NOt for Cisco Call Control. third-party
hosted call control only (Asterisk 1.8+;
Broadsoft 19sp1, 20sp1, 21sp1; 22sp1;
Centile Istra SP 9.2; Metaswitch 9.3) | No for Cisco Call Control. third-party hosted call control only (Asterisk 1.8+; Broadsoft 19sp1, 20sp1, 21sp1; Centile Istra SP 9.2; Metaswitch 9.3) | No for Cisco Call Control. third-party hosted call control only (Asterisk 1.8+; Broadsoft 19sp1, 20sp1, 21sp1; Centile Istra SP 9.2; Metaswitch 9.3) | N/a |
| UC Manager Encryption
Support (TLS/SRTP) | Yes | No | No | N/A |
| Notes | CP-6821-3PCC-K9=,
CP-6821-3PW-K9 | CP-6841-3PW-AU-K9=,
CP-6841-3PW-CE-K9=,
CP-6841-3PW-NA-K9=,
CP-6841-3PW-UK-K9= | CP-6851-3PCC-K9=
CP-6851-3PW-AU-K9=,
CP-6851-3PW-CE-K9=,
CP-6851-3PW-NA-K9=,
CP-6851-3PW-UK-K9= | CP-68KEM-3PCC= |
| PID |
