Motorola MTP850 Ex Product Information Manual page 56

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3 Private Call (TMO)
The Private call service enables the terminal to communicate one-on-one with another TETRA
terminal when in TMO mode.
The terminal supports Individual call service to a TETRA identity as described in the Air Interface
standard [Ref 1], clause 14.5.1, and the TIP [Ref 10] clause 7.
3.1 Terminal Ergonomic Features
3.1.1 Private Call Address Book
See Paragraph 18.9 "Unified Address Book (Contacts)".
3.1.2 Terminal TETRA ID Display
The user is able to view his name and/or his own ISSI address. This information is read from the
codeplug. This information is used for display purposes only and has no affect on the terminal
operation.
3.1.3 Dialing Methods
The terminal supports the following methods for selecting a number for an outgoing private call:
• Via Contact list
• One Touch Button
• Via Call History list
The detailed description of the different dialing methods is shown in the Paragraph 18.10 "Dialing
Methods".
3.1.4 Initiating a Private Call
After selecting or entering a target address, the user may press PTT to initiate a half-duplex private
call, or may press the <Send> key to initiate a Mobile to Mobile (or Mobile to Console) full duplex
call.
When the user is involved in a half-duplex or full-duplex call, the <End/Cancel> key will end the call.
If the user initiates a half-duplex private call, the terminal will respond either with a talk permit tone to
indicate that the call is through-connected or an alerting tone indicating that the called terminal is
ringing.
3.1.5 Receiving a Private Call
3.1.5.1 Half-Duplex/Full-Duplex Operation
Incoming private calls can be either half-duplex or full-duplex. On receipt of a half-duplex call with
on/off hook setup, or a full-duplex call setup, the terminal rings. In a half-duplex call, the user then
presses and holds PTT to talk. On a full-duplex call, the user accepts the call by pressing <Send>,
and the full-duplex call is established.
3.1.6 Talk Time Limit
In a half-duplex call, the terminal limits the amount of time the user can continuously talk without
interruption according to a provisioned value. The user will be warned a short time before the talk
time expires.
6866588D21-D Chapter 2 - MTP850 Ex/MTP810 Ex Product Information Manual
Services and Feature Description
March 2009