Emergency Operation (TMO) 2-17
September 2008
Chapter 2 - MTM800 Product Information Manual 6866537D87-F
4.3.4 DTMF (One Press) Over Dialing
DTMF Overloading enables the user to send out DTMF/MFV tones and is only available when the
terminal is active in a phone call. The DTMF feedback tone to the user is generated by the terminal.
DTMF tones are used to control e.g. an answering machine or a voice mail box.
4.3.5 Calling Line Identification Presentation (CLIP)
The calling party number is transported as part of the call set up signalling and is displayed on the
terminal screen. If the number is held in the terminal’s Address Book, then the name/alias
associated with the entry will be displayed.
4.3.6 112/110/999 Dialing (pending on the infrastructure/SwMI)
If the user initiates a call to a phone number programmed as the emergency call number, the call is
made with Call Priority 15 (Pre-emptive emergency priority) and the terminal display will not show
anything special to indicate that it is in emergency mode.
4.4 Address Book
This contains the following 3 lists:
• Private Call list - this can have to 100 entries.
• Phone List - this can have to 100 entries.
•PABX List - this can have to 25 entries.
These contain stored numbers for user dialing.
5 Emergency Operation (TMO)
5.1 Emergency Group Operation
5.1.1 Emergency Group Mode
Emergency mode is entered when the user presses and holds the dedicated emergency button for a
defined period of time.
On entry into the emergency mode any existing call or service other than the packet data service will
either be aborted or cleared down.
In emergency mode, the terminal automatically rejects PSTN, PABX and private calls and does not
monitor groups in the user selected scan list, but if an Announcement Talk Group (ATG) is the
selected group, then the terminal monitors the groups associated with the ATG.
The terminal remains in emergency mode until user action exits the emergency mode and restores
normal operation.
Benefits:
❏ Instant high priority access to the group
❏ Dispatcher is notified via emergency status
❏ The emergency group is notified of the emergency situation via a tone and the display
❏ ”Hot mic” enables the user to call for help without touching the terminal
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