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• Cisco DP-9851-K9 is a secure, enterprise-grade VoIP desk phone with a 3.7-inch color LCD, 46-line capacity, 6 programmable keys, and built-in TPM 2.0 security—ideal for modern hybrid work environments

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Cisco DP-9851-K9 Desk Phone - Carbon Black

The Cisco DP-9851-K9 Desk Phone offers a premium calling experience for modern business environments. With a 3.7-inch color backlit LCD and support for up to 46 lines, this VoIP phone combines functionality, usability, and security. The integrated Trusted Platform Module (TPM) 2.0 ensures secure communications, while features like acoustic echo cancellation, adaptive jitter buffer, and HD audio provide exceptional voice quality.

Designed for compatibility with Cisco Unified Communications Manager, Webex Calling, BroadWorks, Asterisk, and more, the DP-9851 is built to support hybrid work, hot desking, and secure meetings. Built with 74% post-consumer recycled materials and ENERGY STAR certification, it also supports Cisco’s sustainability goals.

• Display: 3.7-inch color LCD with 480 × 240 resolution and backlight for clear call and menu visibility.
• Line Support: Handles up to 46 lines with 6 programmable physical keys.
• Advanced Security: Equipped with TPM 2.0, FIPS 140-2 compliance, and TLS 1.3 for encrypted communications.
• Enhanced Audio: Supports wideband codecs, HD audio, AI noise removal, and full-duplex speakerphone with echo cancellation.
• Power Options: IEEE 802.3af Class 3 PoE support or external power adapter (sold separately).
• Sustainability: Built with 74% post-consumer recycled plastic, supports deep sleep mode, and ENERGY STAR certified.
• Smart Features: One Button to Join (OBTJ), call recording, voicemail, conference mode, QR code access, hot desking, and calendar integration.
• Connectivity: Dual Gigabit Ethernet ports, RJ-9 headset jack, USB-A and USB-C ports.

• Model: DP-9851-K9
• Display: 3.7" color LCD, 480 × 240 pixels, backlit
• Voice Codecs: G.711 (a/μ-law), G.722, G.722.2, G.729a/b, iLBC, iSAC, Opus
• Security Features: TPM 2.0, Secure Boot, TLS 1.3, SRTP, FIPS 140-2
• Connectivity: 2 × RJ-45 10/100/1000 Ethernet, RJ-9 headset jack, USB-A, USB-C
• VoIP Protocols: SIP, RTP, SRTP, RTCP, SDP
• PoE Class: Class 3 (IEEE 802.3af)
• Power Consumption: 2.69W (PoE display off), 0.69W (PoE deep sleep)
• Body Material: ABS polycarbonate, 74% post-consumer recycled plastic
• Color: Carbon Black
• Dimensions (H × W × D): 8.9 × 8.43 × 1.94 in (226.06 × 214.24 × 49.4 mm)
• Weight: 968 g
• Certifications: ENERGY STAR, CE, UL, FCC