E F Johnson Company 2425720 사용자 설명서

Viking™ VP600 Portable Radio Operating Manual

5-15

Post-Tx ANI - A pre programmed ANI sequence is automatically sent each time the 
PTT switch is released.

When an emergency alarm or call is placed, this ANI signaling is replaced by the 
Emergency DTMF ID (see Section 5.9). Refer to Section 5.12.3 for information on 
MDC1200 ANI.

This feature allows the user to transmit a single tone by pressing the Single Tone Encoder 
option button or selecting that menu parameter. Each conventional system can be 
programmed for a tone of 500-2500 Hz in 1 Hz increments with a duration of 0.5-2.5 
seconds in 0.1 second increments.

This feature can be activated with a button press or can be used for Pre and Post ANI, 
Emergency Alarm, or RTT.

MDC1200 is a signaling protocol designed and implemented by Motorola for analog 
channels only. The following features of this protocol are supported. Either MDC1200 or 
standard DTMF ANI/Emergency signaling can be programmed on each conventional 
system.

MDC1200 ANI - Both pre and post ANI are supported.

MDC1200 Decode - MDC1200 decode functionality is supported so that the radio can 
handle the following MDC1200 features:

• Process the system acknowledgement of emergency transmissions – so that the user 

knows that the emergency has been received 

• PTT ID Decode - Display the ID / Alias of a calling radio on all other radios 

• Selective Radio Inhibit – Allow the dispatcher to inhibit a radio 

• Call Alert – Alerts the user to call the dispatcher 

• Radio Check – Verify that the unit is within the operating area 

MDC1200 Emergency Alarm - The radio continues trying its emergency transmission 
until the emergency is acknowledged by the system.