E F Johnson Company 2425720 사용자 설명서

5-16 

Viking™ VP600 Portable Radio Operating Manual

A single transmission consists of five separate tones transmitted sequentially with an 
optional inter-tone pause between tones. If Five-Tone is selected as the RTT type, then 
Five-tone shall also be used as the signaling type for conventional analog emergencies. 
The first four tones are used for unit identification and the fifth tone is used for status.

No two adjacent tones shall be the same frequency. When two identical digits follow each 
other, the second shall be transmitted as the “Repeat” tone.

Five Tone signaling can also be used for Pre Post ANI and Emergency Alarm Signaling. 
Fifth Tone Status values are:

Tone 1 – Normal Call

Tone 9 – Emergency Call

Tone 2 – Normal Secure Call

Tone 8 – Emergency Secure Call

GE Star signaling is implemented for transmit functionality. Two programming modes are 
available: 

Standard format (normal ANI for pre- and post- ANI and RTT and emergency).

NYSP format (emergency)

The Two Tone Encoder operates the same as the Single Tone Encoder except that it sends 
two tones back-to-back. A maximum of 255 tones can be programmed. Each tone will 
send two tones, each of its own frequency and duration.

The user can activate Two Tone in several manners. The first is to program a button for 
Two Tone and press it. This will give the user the option to choose the desired tone in the 
list.

The second is to program Two Tone to the menu, select it from the menu, scroll to the 
desired tone in the list, and press PTT or the 

 (Menu) button on the portable. Pressing 

PTT or the 

 (Menu) button will send the tone and store it as the active Two Tone. The 

Two Tone List is exited if the Menu Mode Timer expires, if the user presses the exit 
button, 

 (Clear), or if the user presses the button programmed for Two Tone while in 

the Two Tone List. Exiting the menu will not save the current Two Tone as the active Two 
Tone.