Operating Manual Part 15

10-16 5300 ES Series Mobile Radio Operating Manual October 2008
Secure Communication (Encryption)
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.
10.6.2 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).
- The data channel icon goes out (once the radio returns to a control channel), but the
data context icon stays on.
If the data context icon is not on, you do not have an SNDCP context (i.e., you are not data
registered).
Once the radio has a data context, if it is configured for OTAR and has a UKEK, it will
attempt to OTAR register. Depending on timing, the radio may stay on the data channel
for a longer period of time (the second step above) while it OTAR registers, an action
which can kick off an OTAR update procedure. Eventually the radio will leave the data
channel. The radio will be told by the system when it should the data channel.