Chapter 6: Features; Private Call; Making Private Calls; Radio Messaging System (Rms) - Motorola MTP850 Feature User Manual

Chapter
6
Features

Private Call

The Private Call, also called point-to-point, or individual call, enables calling between two individuals. No other radio
can hear the conversation. This call type can be carried out in two ways:
• Duplex call (if the system allows), in TMO Mode. Both parties can speak at the same time.
• Simplex call, in TMO or DMO Mode. Only one party can speak at a time.
When a DMO Private Call takes place, radios not involved in this call receive the channel busy indication. The radios
are identified using its radio numbers.
Related Links
Emergency Individual Calls (Private or MS-ISDN)

Making Private Calls

Procedure:
1 From the home screen, enter a number.
2 If Private is not the first type of call presented, press Ctype repeatedly to select it.
3 When you are in the following mode:
a TMO — For simplex calls, press and release the PTT button. You hear a ringing tone. Otherwise, press and
hold the PTT button. Wait for the talk permit tone before talking, and release the PTT button to listen. For
duplex calls, press and release the S
b DMO — Only simplex calls are available. Press and hold the PTT button. Wait for the talk permit tone before
talking, and release the PTT button to listen.
4 To end the call, press the E

Radio Messaging System (RMS)

The Radio Messaging System (RMS) feature enables radio to receive and send RMS messages through the TETRA
network using the Short Data Service.
There are two types of RMS messages:
• RMS Status – a predefined code that is sent bidirectionally between the radio and the service provider. The radio
can have up to ten statuses that are assigned to numeric keys from 0 to 9. The latest received or sent RMS status is
kept on the home screen until the next power cycle. A received RMS status is displayed in blue color font on the
home screen.
RMS Free Text – a unidirectional message containing free text that is sent to the radio by the service provider.
Since this type of message is longer, the radio displays only its beginning on the home screen and to read its
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key. You hear a ringing tone.
END
key.
ND
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