Simplex Private Call; Duplex Private Call; Transmission Timeout Timer; Call Restoration In Private Call - Motorola ST7000 Product Information Manual

• By selecting a contact from the address book.
• By selecting a contact from the favorite folder.
When a DMO Private Call takes place, radios not involved in this call receive the channel busy
indication. The radios are identified using their radio numbers.
2.8.1

Simplex Private Call

The radio is able to make and receive private calls to and from other TETRA radios with simplex
speech capability. This call type uses TETRA individual call signaling.
All private calls are initiated using the on-off hook method. For incoming calls, the radio accepts both
direct and on-off hook setup.
2.8.2

Duplex Private Call

The radio allows making and receiving private calls to and from other TETRA radios with duplex
speech capability. Depending on the configuration, the radio may prohibit you from initiating duplex
private calls.
The radio always initiates duplex private calls using on-off hook signaling with the traffic channel
allocated by the SwMI only after the called party has answered the call. Therefore, the radio generates
all progress tones during the call setup. In addition, the radio allows the SwMI to modify the call setup
to direct. This modification enables the infrastructure to generate the progress tones.
2.8.3

Transmission Timeout Timer

In a simplex call, the radio limits the time you can continuously talk in a group call without interruption,
according to a provisioned value. You are warned a short time before the talk time expires.
2.8.4

Call Restoration in Private Call

If the radio roams while you are the transmitting party in a private call, the announced cell reselection is
employed (if possible). Call restoration procedures are performed in the new cell.
If you are not the transmitting party, the radio employs an unannounced cell reselection, followed by
the call restoration procedures.
2.8.5

Call Modification

Call Modification is a feature that allows your service provider to modify the call to optimize it and
adjust to a current situation.
Modification can cover:
• Call priority - modified during call setup.
• Call type - modified during call setup.
• Call encryption - modified during an ongoing call, but not in the transmission phase.
When the call is modified, your radio displays Call Modified message.
When a recently modified call requires the PTT button to transmit, your radio displays Call
Modified Use PTT.
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MN002955A01-AA
Chapter 2: Services and Features
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