Hytera PT580H Plus, Manual

7

Viewing a Message

1.  On the home screen, press the 

Func/OK

 key to go 

to “Message -> Inbox”, and select the appropriate 
message. 

2.  Press the 

Func/OK

 key to view the content. 

DMO Service

The direct mode operation (DMO) supports half-duplex 
operation and allows the terminals to communicate 
directly with each other, without using a TETRA network 
infrastructure. Thus features that require network access 
will be unavailable. 

Individual Call 

An individual call is a half-duplex call initiated by an 
individual user to another individual user. You can initiate 
and receive an individual call to/from an individual 
contact.

Initiating an Individual Call 

1  Press the 

Func/OK

 key and go to “PhoneBook” 

menu to select an individual contact. 

2  Hold down the 

PTT

 key to initiate the call. 

3  Hold down the 

PTT

 key to talk after the call is 

established. 

Answering an Individual Call 

You can answer the call without any operation. 

Ending an Individual Call

Press 

 to end the call. 

Group Call

The group call operations in DMO are similar to those in 
TMO. Refer to Group Call for details. 

Emergency Call

An Emergency call is a call initiated by an individual 
user to the default group for summoning help in urgent 
situations. With the highest priority, it can interrupt any 
other ongoing calls with lower priority if no resource is 
available. 

Initiating an Emergency Call

Hold down the 

Emergency

 key for the preset time to 

initiate an emergency call to the default group. 

Answering an Emergency Call

You can answer an emergency individual call or group 
call without any operation. 

Ending/Exiting an Emergency Call 

●

The calling party can press 

 to end the 

Emergency call. 

●

The called party can press 

 to exit the 

Emergency call. 

Message Service 

The message operations in DMO are similar to those in 
TMO. Refer to Message Service for details.