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- Description
- Specifications
CP-7821-3PCC-K9 is the Cisco IP Phone 7821 shipped with Multiplatform Phone firmware, and it is also written CP-7821-3PCC-K9=. The 7821 handles 2 full directory-number lines as SIP registrations. Gift-box versions of the same phone are CP-7821-3PW-AU-K9= and CP-7821-3PW-NA-K9=.
Audio codecs are G.711 (A-law and mu-law), G.722, G.722.2, G.729ab, iLBC and OPUS. The analog headset jack is a wideband-capable RJ-9 audio port, and DTMF is sent in-band, out-of-band (RFC 2833) or with SIP INFO. The phone supports LLDP, CDP, DHCP and IPv4; IPv6 needs system interoperability testing.
Call control includes BLF, call transfer, call waiting, call park, hosted conferencing and shared or bridged line appearances, although some of these depend on server support. Security covers 802.1X, SRTP with AES-128 and AES-256, TLS v1.2 and FIPS 140-2. Directories can come from BroadSoft, LDAP over TLS or a local phonebook.
Management uses auto-provisioning over TFTP, HTTP or HTTPS, and the Problem Reporting Tool collects diagnostics. These features are those of Multiplatform firmware release 11.3.1.
| Phone | Cisco IP Phone 7821 |
| Firmware | Multiplatform Phone firmware |
| Lines | 2 full DN lines |
| Protocol | SIP |
| Codecs | G.711, G.722, G.722.2, G.729ab, iLBC, OPUS |
| Headset port | wideband-capable RJ-9 analog |
| DTMF | in-band, RFC 2833, SIP INFO |
| Network | LLDP, CDP, DHCP, IPv4 |
| Security | 802.1X, SRTP AES-128/256, TLS v1.2, FIPS 140-2 |
| Directories | BroadSoft, LDAP over TLS, local phonebook |
| Provisioning | TFTP, HTTP, HTTPS |
| Spare form | CP-7821-3PCC-K9= |