HARRIS CORPORATION M7200VTAC 사용자 설명서

 

An emergency is dismissed for a configurable amount of time only (default = 5 minutes). 

To ignore an emergency call declared by another radio user: 

1.  Press 

 until “EmgDismiss” appears in the display. 

2.  Press 

 until the talk group in the emergency state appears, as indicated by an asterisk (*) 

following the talk group’s name. 

3.  Press the 

 button. 

 

The emergency dismiss timer is cleared when the emergency is cleared. 

In the OpenSky network, both data and voice use a 128-bit or 256-bit key encryption standard published 
by the Federal Information Processing Service (FIPS), called Advanced Encryption Standard (AES). AES 
is approved by the U.S. Department of Commerce for encryption of classified materials. 

When encryption is enabled on the network, data is encrypted from the MDIS to the Mobile End System 
(MES) (e.g., M7200 mobile radio). This form of encryption provides air-link security. 

Voice encryption is handled either automatically or manually. Automatic encryption is initiated through 
the Unified Administration Server (UAS) for a specific talk group and requires nothing from the user. 
Manual encryption is initiated by two or more radio users and requires system model control heads. Both 
methods of encryption are discussed in the following sections. 

For automatic encryption, a network administrator will select the talk group to be encrypted at the 
interface to the UAS. Once the talk groups have been selected and identified as secure, credentials for key 
generation are generated automatically by the system and provisioned to authorized users. This process 
requires that authorized users login to the network and be authenticated. Encryption keys require no 
manual handling and are never sent “in the clear” over any network interface or air-link. 

1.  “Pls Login” appears displayed in the bottom line of the dwell display. 

2.  Login normally using the keypad on a system model control head to enter User ID and Password. 

If a user is engaged in a call on a talk group encrypted at the network administrator level, “Secure Call” 
will appear in the bottom line of the dwell display if the user is logged in to that talk group. 

If a secure call is in progress elsewhere and the user has not logged in, the bottom of the dwell display 
will alternate between “No Access” and the alias of the radio that is currently engaged in the secure call. 

Two or more users can manually encrypt a call, if enabled, without an established encrypted talk group. A 
pre-determined key is required at each radio.