E F Johnson Company 2425770 Benutzerhandbuch

6-8 

Viking Portable 600 Radio Operating Manual

Numbers up to 32 digits (including pauses) can be entered. Press the Phone option 
button to cancel the call.

3 Press and release the PTT switch and “Dialing” is displayed. Events that may occur are 

as follows:

- If the access is successful, a dial tone sounds and the dialed number is displayed and 

sent. Either ringing or a busy signal is then heard as with a standard telephone call. 
When the called party answers, press the PTT switch to talk and release it to listen 
(since the radio is half-duplex, it is not possible to talk and listen at the same time). 
Each time the PTT switch is released, a go-ahead tone is sent to the landside party to 
indicate when they can respond. To dial a number after the connection is made, press 
the PTT switch and dial the number using the microphone keypad.

- If the selected telephone number is not valid, “Invalid” is displayed and an alert tone 

sounds. Select a valid number.

- If the system is busy, “Busy” is displayed and the busy tone sounds. The call will 

automatically proceed when the system becomes available.

- If you are out-of-range or the radio cannot be accessed for some reason, “No Phone” 

is displayed and an alert tone sounds.

- If the interconnect call you are making or the selected secure mode is not authorized, 

“Reject” is displayed and an alert tone sounds.

- If your radio does not have the proper encryption key, “Key Fail” is displayed and the 

call must be made in the clear mode using the Clear/Secure option button or menu 
parameter (if encryption is selectable on the channel). Otherwise, load the proper 
encryption key.

4 When the telephone call is finished or if it could not be completed for some reason, end 

it by pressing the Phone option button or <F1> (Exit) button.

To answer a telephone call:

1 When a telephone call is received, “ringing” similar to a standard telephone is heard 

and “Phone” is displayed.

2 To answer the call, press the Phone option button or select that menu parameter and 

press the PTT switch to talk and release it to listen. Since the radio operates half duplex, 
it is not possible to talk and listen at the same time.

3 When the call is finished, end it by pressing the Phone option button or <F1> (Exit) 

button.