Does voip work if I have poor internet reception?

Your internet has nothing to do with it. VoIP is is how you connect and talk on your local network

the CP-7821 is unable to setup. can you please tell me if its unlocked?

Hello Hossain, What call control system you're using to configure the phone? Make sure it is on of the following supported by the 7800 series phones: - Cisco Unified Communications Manager - Cisco Business Edition 6000 - Cisco Hosted Collaboration Solution - Cisco Unified Survivable Remote Site Telephony Thanks

do you have smartnet for this phone? price smartnet?

This phone is SMARTnet eligible but I do not have SMARTnet. I think it's $5-8 per phone for SMARTnet though.

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Cisco 7821 MPN UC Phone

Product ID: 162368071

Details

Brand
Cisco
Colour
Black
Number of Batteries
1 Lithium Ion
Power Source
Corded
Telephone Type
Corded

📞Multi-line operation for seamless calls

🔋10-hour standby, 1-hour talk time

🎙️16-minute digital recording capacity

KD 172.10

Duties & taxes included

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Description

📞 Elevate your desk game with Cisco’s powerhouse UC phone!

ALL DAY STANDBY POWER - Stay connected longer with up to 10 hours of standby time—no more dead phones during crunch time.
CRYSTAL CLEAR CALLER ID - Instantly identify callers to prioritize your most important conversations.
COMPACT PORTABLE DESIGN - Sleek black finish and lightweight build fit perfectly in any modern workspace.
EFFORTLESS MULTI LINE MASTERY - Handle multiple calls with ease on a sleek, professional interface.
SEAMLESS CISCO UC INTEGRATION - Optimized for Cisco Unified Communications systems to keep your team in sync.

The Cisco 7821 MPN UC Phone is a professional-grade, corded communication device designed for seamless multi-line operation within Cisco Unified Communications systems. Featuring a digital answering system, caller ID, and 16 minutes of recording capacity, it offers up to 10 hours of standby time and a compact, portable design ideal for busy office environments.

Specifications

ASIN	B00GYM46KS
Answering System Type	Digital
Brand Name	Cisco
Colour	Black
Compatible Devices	Cisco Unified Communications (UC) system, Cisco communication devices
Conference Call Capability	basic
Customer Reviews	3.1 3.1 out of 5 stars (38)
Dialer Type	Single Keypad
Global Trade Identification Number	04053162392854, 07427457249241
Is there Caller ID	Yes
Item Dimensions	27.9 x 7.6 x 30.5 Centimeters
Item Part Number	CP7821K9
Item Weight Unit of Measure	1.12 Kilograms
Manufacturer	Cisco
Manufacturer Part Number	CP-7821-K9
Model Number	CP-7821-K9
Multiline Operation	Multi-Line Operation
Number of Batteries	1 Lithium Ion batteries required.
Phone Standby Time	10 Hours
Phone Talk Time	1 Hours
Power Source	Corded Electric
Recording Capacity	16 Minutes
Telephone Type	Corded
UPC	698833040104 014445185956 808113000210 804067316339 696732677292 809395316891 799198470442 804904119697 096962256593 882658621840 716252413504

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