E F Johnson Company 2425M70 Benutzerhandbuch

8-16

The following are the minimum parameters that need to be programmed in the radio to 
perform OTAR. It is not necessary to program a TEK but it is necessary that a UKEK be 
manually programmed to perform OTAR. If the radio does not contain a TEK, the KMF 
initiates a warm start-up sequence in which a temporary TEK is transferred to the radio to 
perform the key transfer.

UKEK - This key normally has SLN (CKR) 61440 and Key ID 62880 (F5A0 hex). 

Unit RSI - This is normally initially the same as the P25 Unit ID and is programmed by 
Armada as described in Section 8.6. Therefore, the RSI should not need to be loaded if 
it is the first time the radio is being set up for OTAR or if the radio dumps keys due to 
long-term battery disconnect. However, it may need to be loaded if the radio is 
manually deleted from the KMF and then recreated since the message number must be 
reset to 0 (the Load Target RSI command resets the message number to 0).

KMF RSI - This RSI is normally 9,999,999 and should not need to be loaded since it 
defaults to this number. 

Verify that the above information was properly stored in the radio by viewing it using the 
keyloader.

The OTAR capabilities of the SEM-equipped Viking VM600 mobile radio are as follows.

• Up to three keysets are used and it is assumed all three are always present. Keyset IDs 1 

and 2 are for TEKs and only one is active at a time. Keyset ID 255 is for KEKs and is 
considered active all the time

• Each keyset can have up to 128 keys. However, 16 or less are normally used. 

• One individual RSI and it is usually initially the same as the P25 Unit ID.

• One group RSI (usually initially “0”).

• One KMF RSI (usually always 9,999,999).