We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Charcoal corded IP phone, wall-mountable, monochrome 3.5 inch display, two RJ-45 ports, PoE

Cisco Systems, Inc.

Cisco Systems, Inc. CP-7821-K9= 2-line VoIP telephone Charcoal

SKU CH-62PT-G32Q6 MPN CP-7821-K9=

A corded VoIP desk phone with two lines, a 3.5-inch monochrome display, dual RJ-45 ports and PoE support in a wall-mountable charcoal chassis

  • Product typeCorded IP Phone
  • Two simultaneous lines for handling separate calls
  • VoIP operation over standard SIP networks
  • 5 inch monochrome display for clear call details
  • Dual RJ-45 ports with PoE for single-cable deployment
  • Wall-mountable charcoal design saves desk space

Two-line VoIP phone for office desks

The Cisco CP-7821-K9= is a corded IP telephone that supports two simultaneous lines. It connects through two RJ-45 network ports and draws power over Ethernet, so no separate adapter is required. The 3.5 inch monochrome display shows caller ID and call status. A User Connect License is included for provisioning.

Sustained call handling and wall mounting

During long conversations the handset and full-duplex speakerphone remain active without external power. PoE delivers continuous current through the network cable, keeping the phone operational for full work shifts. The wall-mountable chassis measures 8.15 inches high, 8.11 inches wide and 1.10 inches deep, weighing 867 grams for secure installation.

SIP and SRTP over dual Ethernet ports

The phone uses SIP for call control and SRTP for encrypted media streams, both carried on the two RJ-45 interfaces. LDAP and CDP support directory lookup and network discovery within the same link. No wireless, Bluetooth or additional codec licences are provided, limiting connectivity to wired Ethernet infrastructure.

How it compares

Measured against everything we stock in Business Telephones, at today’s prices. Recalculated every night.

Price $167.99
Pricier than about 75% of the 242 comparable items (median $53.99).

Specifications

Product
Brand nameCisco
Model nameCP-7821-K9=
Part numberCP-7821-K9=
Product typeCorded IP Phone
Size & build
Shipping weight1.09 kg
Package size279 × 231 × 74 mm

Questions about this item

How much heat and noise does the CP-7821-K9= produce when powered by PoE all day?

The phone draws power through its PoE port and has no fan, so it runs silently and generates only minimal warmth during continuous operation.

What network equipment must I already have to run this 2-line VoIP phone?

You need a PoE-capable switch or injector to supply power over the Ethernet cable, plus a SIP-compatible call-control server or hosted PBX to register the two lines.

Will the CP-7821-K9= work alongside my older analogue handsets on the same PBX?

Yes, as long as the PBX supports SIP endpoints, the Cisco 7821 registers as a standard SIP device and operates in parallel with legacy analogue or digital extensions.

More in Business Telephones

Similar items