The Cisco® Video Surveillance 2421 Standard-Definition IP Dome is a feature-rich digital IP camera designed for superior performance in a wide variety of video surveillance applications. The camera employs MPEG-4 and MJPEG compression of up to 30 frames per second (fps) at D1 NTSC resolution (720 x 480) or 25 fps at D1 PAL resolution (720 x 576), offering efficient network utilization while providing high-quality video. With its open, standards-based design, the camera provides an ideal platform for integration and operation as an independent device or as part of a Cisco Video Surveillance network.
Figure 1 shows the Cisco Video Surveillance 2421 IP Dome.
Figure 1. Cisco Video Surveillance 2421 IP Dome
The Cisco Video Surveillance 2421 IP Dome offers a variety of benefits, including:
• Wide dynamic range. The camera employs powerful digital imaging technology, allowing it to capture high-quality images in a wide variety of lighting conditions. It uses a progressive scan image sensor with global electronic shuttering to ensure natural color rendition, zero blooming and smear, and minimal motion blurring.
• Dual streaming. The camera can stream MPEG-4 and MJPEG video simultaneously. Each video stream can be configured with individual resolution, quality, and frame rate settings.
• Flexible power options. The camera supports Power over Ethernet (PoE) 802.3af, and 12 VDC or 24 VAC power through an optional external power supply.
• Mounting options. The camera was designed specifically for internal ceiling tile mount deployments. There is an optional shroud for surface mount installations. The camera is equipped with a varifocal lens mounted to a manual pan and tilt mechanism that allows the camera to be rotated and placed at the proper angle.
• Day/night operation. The camera provides true day/night operation and includes an IR filter that automatically switches to night mode in low-light scenes. This function can be set to manual or automatic control.
• Cisco Media Application Programming Interface. The camera supports the Cisco Media API, which is an open, standards-based interface that allows integration with compatible video surveillance management systems.
• Embedded security and networking.* The camera provides 802.1X authentication and hardware-based Advanced Encryption Standard (AES). For enhanced bandwidth management, the camera supports IP Multicast.
• Event notification.* The camera can examine designated areas in the video for motion activity and then notify users or other applications when it detects activity that exceeds a predefined threshold.
Note: Features with an asterisk are not available when the camera is used with Cisco Video Surveillance Manager.
Table 1 describes the features of the Cisco Video Surveillance 2421 IP Dome.
Table 1. Cisco Video Surveillance 2421 IP Dome Features
1/3-in. progressive-scan RGB CMOS sensor with wide dynamic range
Automatic white balance (AWB), automatic back lighting, automatic gain control (AGC), automatic exposure (AE), auto iris.
102 dB typical/120 dB maximum
• Color mode: F1.4 @ 0.65 lux
• Black and white mode: F1.4 @ 0.08 lux
Signal-to-Noise Ratio (SNR)
DC auto-iris lens with day/night filter
Field of view:
• Horizontal: 22°-76°
• Vertical: 17°-56°
Camera Angle Adjustment
MPEG-4 SP level 0 to 4, ASP level 0 to 5, MJPEG
Resolution and Frame Rate
• 720 x 480/576 @ 30/25 fps (D1)
• 704 x 480/576 @ 30/25 fps (4CIF)
• 352 x 240/288 @ 30/25 fps (CIF)
• Single-stream MPEG-4 up to D1 720 x 480/576 @ 30/25 fps
• Single-stream MJPEG up to D1 720 x 480/576 @ 15 fps
• Dual-stream: MPEG-4 and MJPEG
• Primary stream MPEG-4 programmable up to 704 x 480/576 @ 25/20 fps
• Secondary stream MPEG-4/MJPEG (selectable) programmable up to 352 x 240/288 @ up to 15 fps
Dynamic Host Control Protocol (DHCP), File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP), Secure HTTP (HTTPS), Network Time Protocol (NTP), Real-Time Transport Protocol (RTP), Real-Time Streaming Protocol (RTSP), Simple Mail Transfer Protocol (SMTP), Secure Sockets Layer/Transport Layer Security (SSL/TLS), Transmission Control Protocol/Internet Protocol (TCP/IP)
Quality of Service (QoS)*
Differentiated services code point (DSCP) marking
• 12 VDC or 24 VAC, isolated external power supply
• PoE (802.3af) @ 48V/0.3A
*Not supported when the camera is used with Cisco Video Surveillance Manager.
Table 2 describes the connectivity and connectors of the Cisco Video Surveillance 2421 IP Dome.
Table 2. Cisco Video Surveillance 2421 IP Dome Connectors
10/100 BASE-TX Ethernet with RJ-45 connector
3.5-mm service connector, provides analog video (use with included mini cable with BNC adapter during installation)
Table 3 describes the primary features of the Cisco Video Surveillance 2421 IP Dome software.
Table 3. Cisco Video Surveillance 2421 IP Dome Primary Software Features
4 user-definable motion detection areas; e-mail alert and FTP uploading of captured video or JPEG snapshots triggered by motion alert
NTSC and PAL
Auto or manual day/night operation with user-definable thresholds
Configurable, brightness, sharpness, contrast, saturation, and white balance
Time, date, and text
Selectable Bit Rate
Support for Constant Bit Rate or Variable Bit Rate* (constant quality)
Users can enter a list of allowed or blocked IP addresses for viewing video and configuring camera settings
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