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Charcoal Cisco IP Phone 8851 desk handset with colour screen and multiple line keys

Cisco Systems, Inc.

Cisco Systems, Inc. CP-8851NR-K9= VoIP phone

SKU CH-GNDS-NHQJP MPN CP-8851NR-K9=

VoIP desk phone supporting SIP, SRTP and five lines with integrated Ethernet switch

  • Product typeAccessories
  • DetailsMain Features: Multiple VoIP protocol support, integrated Et
  • Supports five simultaneous lines for call handling
  • Wideband voice with G.722 and G.711 codecs
  • Secure media streams via SRTP protocol
  • Integrated Ethernet switch simplifies desk cabling

Cisco IP Phone 8851 VoIP handset

The Cisco IP Phone 8851 is a VoIP handset supporting five lines and multiple protocols including SIP, RTCP, RTP, SRTP and SDP. It handles voice codecs such as G.722, G.729a, G.711u, G.711a, iLBC and iSAC. An integrated Ethernet switch simplifies network cabling at the desk.

Suits offices needing five-line SIP endpoints

Teams requiring more than five concurrent lines or non-SIP signalling should consider other models. Buyers needing wireless connectivity or colour displays not listed here will need a different device. The charcoal finish is fixed and cannot be changed.

How it compares

Measured against everything we stock in IP Phones & VoIP Handsets, at today’s prices. Recalculated every night.

Price $406.99
Pricier than about 84% of the 495 comparable items (median $138.99).

Specifications

Product
Brand nameCisco
Model nameCP-8851NR-K9=
Product typeAccessories
Size & build
Shipping weight0.91 kg
Package size152 × 127 × 102 mm

Questions about this item

Does the CP-8851NR-K9= require a PoE switch or separate power adapter to operate?

The phone includes an integrated Ethernet switch and supports Power over Ethernet, so a PoE-enabled network port can supply both data and power without a separate adapter.

Will the 8851 register with my existing SIP proxy that only offers G.711u and G.729a codecs?

Yes, the handset supports G.711u and G.729a among its voice codecs, so it will negotiate a compatible codec with a proxy limited to those two options.

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