Cisco Desk Phone 9851 - VoIP phone - with Trusted Platform Module (TPM) 2.0 with caller ID/call waiting - SIP, RTCP, RTP, SRTP, SDP - 46 lines - carbon black

General

Weight

968 g

Product Type

VoIP phone

Body Material

ABS polycarbonate, 74% post-consumer recycled plastic

Body Colour

Carbon black

Compatible Platforms

Cisco BroadWorks, Asterisk, Cisco Webex Calling, Cisco Webex Dedicate Instance (DI)

Integrated Components

Trusted Platform Module (TPM) 2.0

Manufacturer Warranty

Service & Support

Limited warranty - replacement - 1 year

Miscellaneous

Cables Included

Network cable

Connections

Headset jack / RJ-9 ¦ 2 x network / RJ-45 ¦ USB / 4 PIN USB Type A ¦ USB Type-C / 24 pin USB-C

Placing / Mounting

Desktop

Hearing Aid Compatible

Yes

Power

Power Consumption

2.82 W (power adapter, display off mode), 2.69 W (PoE, display off mode), 0.24 W (power adapter, deep sleep mode), 0.69 W (PoE, deep sleep mode)

Display

Type

LCD display - colour

Diagonal Size

3.7"

Display Resolution

240 x 480 pixels

Display Location

Base

Display Languages

Danish, Hungarian, Czech, Chinese (traditional), Chinese (simplified), Ukrainian, Brazilian Portuguese, German, French, Italian, Norwegian, Portuguese, Polish, Finnish, Swedish, Russian, Spanish, Dutch, Greek, Turkish, Catalan, Japanese, Korean, UK English, US English, French Canadian, Spanish (Columbia), Chinese (Traditional, Hong Kong)

Backlit

Yes

Dimensions & Weight

Width

22.606 cm

Depth

21.424 cm

Height

4.94 cm

Weight

968 g

Phone Features

Dialer Location

Base

Conference Call Capability

Yes

Volume Control

Yes

Indicators

Speakerphone indicator, line status indicator, headset, mute indicator, busy lamp field (BLF), status, calendar indicator, select indicator

Speakerphone

Yes

Additional Functions

Call recording, mute, Music on hold, Do not disturb, conference mode, Kensington security slot, sleep mode, QR code access, one button to join (OBTJ)

Programmable Buttons Qty

6

Call Services

Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Call park/pickup

Caller ID Type

Caller ID/call waiting

IP Telephony

Network Protocols

TFTP, Cisco Discovery Protocol (CDP), DNS, HTTPS, Link Layer Discovery Protocol (LLDP), Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED), RTCP, RTP, GARP, IPv6, IPv4, DHCP, VLAN

Main Features

Integrated Ethernet switch

Voice Codecs

G.722, G.729a, iLBC, G.729b, iSAC, G.722.2, Opus, G.711a-law, G.711µ-law

Quality of Service

IEEE 802.1Q (VLAN)

IP Address Assignment

DHCP, static

Network Ports Qty

2 x Ethernet 10Base-T/100Base-TX/1000Base-T

VoIP Protocols

SIP, RTCP, RTP, SRTP, SDP

Compatible Software

Cisco WebEx, Cisco Unified Communications Manager

Voice Features

Comfort noise generation (CNG), voice activity detection (VAD), acoustic echo cancellation (AEC), packet loss concealment (PLC), adaptive jitter buffer (AJB), automatic gain control (AGC), silence suppression, HD audio, acoustic shock protection, dual tone multi-frequency (DTMF), forward error correction (FEC), ultrasonic support

Lines Supported

46 lines

Security

IEEE 802.1X, EAP-TLS, EAP-FAST, FIPS 140-2, SRTP, TLS 1.3

Network Features

Class 3 PoE

Power Over Ethernet (PoE) Support

Yes

VoIP

Yes

Environmental Standards

ENERGY STAR Certified

Yes