Motorola TETRA MTM800 Manual page 171

Message addressing and sending:
• address can be predefined by Service Provider if not it will
be send to currently selected group
• if no group selected, the message is sent to the reserved
address
• the message is sent even if the user is involved in an active
service
Indication depend on Service Provider. Visible/audible can be
disabled for the status message.
When the radio is PIN locked the user can still press the
Emergency button/footswitch to send the message. If the
radio is out of service the user will only see indication that
operation failed.
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