Table of Contents
Advertisement
Design Guide
Step 1: Remove legacy recording systems
The first integration step is to remove legacy recording systems and introduce a Cisco ISP. The
ISP provides 8 or 12 encoding ports (depending on the model) that connect directly to cameras and
allow the ISP receive and record video streams simultaneously.
Video streams that are sent to the matrix switch need to be routed through the ISP. A simple way to
direct the video streams from the cameras is to use video distribution amplifiers or other looping
methods such as looping ports on a matrix switch.
As shown in Figure 8, a video distribution amplifier receives four video streams from analog
cameras and splits each signal into two streams. Four coaxial cables connect to input ports on the
matrix switch and four coaxial cables connect directly to the encoder ports on the ISP.
Note:
The ISP is connected to the IP Network, but this connection is not shown in this figure
simplicity.
Figure 8.
Legacy recording systems
Step 2: Introduce a Cisco Data Converter
A Cisco data converter is inserted between the matrix switch and the CCTV keyboard to allow the
ISP to intercept keyboard commands that identify when an operator wants to switch from live to
recorded video. For some systems, the data converter switches serial signals from RS232 to either
RS-485 or RS-422 via a dip switch setting. The Stream Manager Software that runs on the ISP
interprets the command structure and determines if a command is intended for the matrix switch or
intended to display digital playback video.
2-4
All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page-2-4
Advertisement
Table of Contents
