CP-7821-K9 Specifications
Cisco IP Phone 7821
Manufacturer: Cisco
Manufacturer Model: CP-7821-K9
Product Line: Cisco 7800 Series
Product Series: 7821
Product Type: IP Desk Phone
Product Name: Cisco IP Phone 7821
KEY FEATURES:
Display: 3.5″ backlit monochrome/graphical display (396 × 162)
Lines / Keys: 2 programmable line keys
Audio: Wideband audio, full-duplex speakerphone
Supported Codecs: G.711a/µ, G.722, G.729a, iLBC
Network / Power: Dual 10/100 BASE-T Ethernet ports, PoE (IEEE 802.3af Class 1) support
Protocol: SIP signaling supported
Compatibility: Designed for Cisco Unified Communications Manager (CUCM) or compatible SIP platforms
Features Supported: PoE support, enterprise-grade reliability
PERFORMANCE:
Voice Quality: Wideband audio for clear call quality
Speakerphone: Full-duplex capable
Line Capacity: 2 lines
Call Handling: Standard office usage, moderate call volume
ENVIRONMENTAL & RELIABILITY:
Operating Temperature Range: Not explicitly specified
Storage Temperature Range: Not explicitly specified
Operating Humidity: Not explicitly specified
Shock Resistance: Not explicitly specified
Vibration Resistance: Not explicitly specified
Reliability: Enterprise-grade build
PHYSICAL:
Dimensions (W x D x H): 207 × 206 × 28 mm (excluding stand)
Weight: ~867 g
Color: Black

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