Evidence Manager Tutorial 07:

Getting to Know Evidence Manager

TOC

CH1: Overview

CH2: Configuring Evidence Manager

CH3: Managing Devices

CH4: Managing Docking Stations

CH5: Managing Evidence

CH:6 Using Evidence Player

CH7: EM Redaction

CH8: Reference Reads

Overview

Depot Manager, Evidence Manager, and multiple devices are connected over a network. At the time of deployment, your network administrator should have configured a network for Depot Manager, Evidence Manager, and the devices to communicate on. By default, Evidence Manager uses the Multicast messaging protocol with 230.1.1.1 as the IP address.

If need be, you can choose another messaging protocol:

  • Unicast: Typically used when multiple networks are used with a router between the devices and the server. A unicast system involves one sender and one receiver, each with its own IP/network address. It is a one-to-one transmission from one point in the network to another point.
  • Multicast: Can only be used on flat networks where the server and devices share the same subnet, with no routers in between. Multicast is group communication where data transmission is simultaneously addressed to a group of destination computers. Multicast can be one-to-many or many-to-many distribution.
  • Broadcast: Broadcasting is the simultaneous transmission of a data packet to multiple network devices. Each network device receives all the signals sent by the transmitters. Security issues may arise during broadcasting and lead to data loss if a network is attacked by intruders. Used for smaller networks that do not support multicast or unicast.

For example, if you select the Multicast protocol:

  • Multiple instances of Evidence Manager appear under Workstations.
  • Multiple devices that are discoverable appear under Unknown Devices.

NOTE: Impact of Network Settings

Because system configuration has the potential to impact how Evidence Manager communicates, we recommend that you modify system settings only if you have a deeper understanding of the network configuration in your depot.

Procedure

To configure Evidence Manager for discovery:

  1. Log in to Evidence Manager.
  2. Go to Tools > Settings.
  3. On the Settings window that appears, click the Discovery tab.
  4. Do the following:
    1. Select the appropriate check box in order to specify a messaging protocol: UnicastMulticast, or Broadcast.
    2. Default IP Address: If you selected Multicast, enter the IP address that will be assigned to this instance of Evidence Manager. The default value is 230.1.1.1, while the valid multicast range is: 224.0.0 to 239.255.255.255.
      If you selected Broadcast, Evidence Manager uses the default value of 255.255.255.255 as the IP address. This
      value cannot be changed.
      If you selected Unicast, the Default IP Address box is grayed, and the IP address of this instance of Evidence
      Manager is set to match the IP address of the Depot Manager server. Evidence Manager will use the Default Port
      for communication.
    3. Default Port: Type or select the default port that Evidence Manager will use for communication.
  5. Click OK.

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