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The Cisco Wireless IP Phone 9821 combines advanced telephony features with user-friendly functionality, designed to enhance communication in any professional setting. With a vivid 2.4-inch LCD display and support for multiple languages, including English and Spanish, it provides versatility for diverse workplaces. This VoIP phone offers robust call management options, including call waiting, caller ID, and call hold features to streamline communication.
Powerful and efficient, the Cisco Wireless IP Phone is equipped with a rechargeable lithium-ion battery boasting a capacity of 4060 mAh, delivering talk time of up to 690 minutes and standby time of 145 hours. The device also features functionalities such as noise reduction, vibrating alerts, and easy access to call recordings, ensuring seamless operation. With its durable design featuring IP54 protection, this phone stands up to environmental challenges, making it a reliable choice for business environments.

Features

• Rechargeable lithium-ion battery with capacity of 4060 mAh for long-lasting performance
• 2.4-inch LCD display with adjustable brightness for clear visibility
• Wide variety of call services including caller ID and call hold
• Durable IP54 rated design providing dust and water resistance
• Integrated Ethernet switch for efficient networking connectivity

Specifications

General

Weight	168 g
Body Colour	Carbon black
Product Type	VoIP phone
Integrated Components	Trusted Platform Module (TPM) 2.0
Compatible Platforms	Cisco BroadWorks, Cisco Webex Calling, Cisco Webex Dedicate Instance (DI)
Protection	IP54, dust protection, water-resistant, shock-resistant

Manufacturer Warranty

Service & Support

Limited warranty - replacement - 1 year

Miscellaneous

Hearing Aid Compatible	Yes
Connections	USB Headset / mini-phone 3.5mm

Display

Backlit	Yes
Display Location	Handset
Type	LCD display - colour
Display Resolution	320 x 240 pixels
Diagonal Size	2.4"
Features	Adjustable brightness
Display Languages	Arabic, Bulgarian, Catalan, Chinese, Taiwanese, Chinese (Traditional, Hong Kong), Croatian, Czech, Danish, Dutch, UK English, English (United States), Estonian, Finnish, French, French Canadian, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Lithuanian, Norwegian, Polish, Brazilian Portuguese, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Spanish (Latin American), Swedish, Thai, Turkish, Ukrainian, Welsh

Battery

Technology	Rechargeable - Lithium Ion
Capacity	4060 mAh
Talk Time	690 min
Standby Time	145 h

Dimensions & Weight

Width	5.6 cm
Depth	1.7 cm
Height	13.2 cm
Weight	168 g

Phone Features

Conference Call Capability	Yes
Volume Control	Yes
Speakerphone	Yes
Dialer Location	Handset
Caller ID Type	Caller ID/call waiting
Cordless Phone Standard	IEEE 802.11a/b/g/n/ac/ax (Wi-Fi)
Indicators	Busy lamp field (BLF), message waiting indicator
Call Services	Call park/pickup, Call Waiting, Caller ID, Call Hold, Call Mute
Additional Functions	Noise reduction system, vibrating alert, auto answer, auto hang up, keypad lock, call recording, man down alarm, speed dial memory, Intercom, Music on hold, Push-to-Talk key, silent mode

IP Telephony

VoIP	Yes
Main Features	Integrated Ethernet switch
IP Address Assignment	DHCP, static
Quality of Service	IEEE 802.1Q (VLAN)
Compatible Software	Cisco WebEx, Cisco Unified Communications Manager
VoIP Protocols	SIP, SDP, RTCP, RTP, SRTP
Voice Codecs	Opus, G.722, G.722.2, iSAC, G.711a-law, G.711µ-law, G.729a, G.729b, iLBC
Security	TLS 1.3, FIPS 140-2, EAP-FAST, WPA2, WPA3, PEAP-GTC, PEAP-MSCHAPv2, EAP-TLS, TKIP, MIC, AES, GCMP
Network Protocols	TLS, IPv4, IPv6, DHCP, GARP, DNS, TFTP, HTTPS, VLAN, RTP, RTCP, Cisco Discovery Protocol (CDP), Link Layer Discovery Protocol (LLDP), Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED)

Internet of Things (IoT)

Internet of Things (IoT) Compatible	Yes
Communications Technology	Bluetooth 5.4