User's Manual

8-18 Viking VM600 Mobile Radio Operating Manual
Secure Communication (Encryption)
Clear/Secure Select - This enables and disables encryption regardless of whether
OTAR is used. Refer to Section 8.3 for more information.
Erase Keys - Erases all TEK and KEK keys contained in the radio.
Key Select - This allows a different key to be selected for the current channel or group
(conventional channels only). Refer to Section 8.2.4 for more information.
OTAR Rekey Request - Sends a message which tells the KMF that the radio is on the
air and requests rekeying. The following status messages are displayed which indicate
the progress of this function.
Rekeying - A radio-initiated rekeying session is in process.
No Ack - No response was received from the KMF in response to an Identify request
before time out occurred (approximately 30 seconds).
Ack Rcvd - An acknowledgement was received in response to an Identify request.
No Service - A “No Service” reply was received from the KMF. No rekeying will take
place.
Rekey Fail - Either the rekey command failed or timed out (after approximately 30
seconds). This message could indicate that the rekey request message was not received
by the KMF. However, depending on the KMF configuration and channel traffic, it is
possible that the message was received and a response is still pending.
Rekeyed! - The rekey session initiated by the radio was successful.
8.7.2 P25 Trunking Icons
There are two different P25-data related icons which indicate if the radio is on a trunking
system. One indicates whether or not you are on a data channel, and one indicates whether
or not you have successfully data registered (i.e., whether or not you were granted an
SNDCP data context by the system). The icons appear to identical, except for their
position on the display.
Over Button 2, this icon indicates P25 Data Context Activated – Radio is ready
for data operations.
Over Button 3, this icon indicates Radio is operating on a data channel
Every time the radio goes to a data channel, the data channel icon will come on, and stay
on, until the radio leaves the data channel. The radio goes to the data channel to do P25-
data related tasks, such as data register, OTAR register, and send and receive OTAR data.
You must have successfully data registered before you can successfully initiate an OTAR
session. The usual sequence when the radio is attempting to data register will be:
- The data channel icon comes on.
- The data context icon comes ON (once we successfully data register).
Draft 4/29/2014