Encryption In The Repeater Mode; Gateway Mode; Figure 7: Gateway Mode Operation - Motorola TETRA MTM5000 Series User Manual

• Off – Your radio works as a repeater only, no operation is available.
• Receive Only – Allows you to listen.
• Receive&Transmit – Allows you to listen and transmit by pressing PTT.
3.6.2

Encryption in the Repeater Mode

While in the Repeater Mode, the radio supports Air Encryption and is able to repeat encrypted calls
and messages.
If Static Cipher Keys (SCK) keys installed on the radio are invalid:
• The radio transfers calls and messages without deciphering them (provided that the encryption level
is not the highest).
• The LED indicator turns orange.
• You cannot make any call.
3.7

Gateway Mode

NOTE: This is a Software Selling Feature. Gateway Mode does not apply to MTM5200 radio.
The Gateway Mode allows your radio to work as a gateway and thus provide connectivity among
radios operating in DMO and TMO Modes.

Figure 7: Gateway Mode Operation

A DMO/TMO gateway is used to provide gateway connectivity between radio operation in the DMO
and the TETRA TMO network. In other words, the gateway mode provides the interface between
TETRA DMO and TMO modes.
While in gateway mode, individual and group calls cannot be initiated. Any active TMO scanning is also
suspended, including the scanning of supergroups.
While in the gateway mode, any individual call from both DMO and TMO cannot be answered. If the
call is incoming from TMO, it is rejected as the called party is busy. The missed call is added to the
missed call list. If the call is incoming from DMO, it is ignored.
While in the gateway mode, group calls are supported. When the gateway receives a group call
addressed to its current selected TMO talkgroup, it forwards the call on to the respective mapped
TMO
TMO
DMO
68015000180-MR
Chapter 3 : Modes
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