document control byte values for DMR and P25;

docs/TN.1000 - FNE Network.adoc

@@ -657,6 +657,21 @@ The payload for a DMR protocol data message is formatted:
          | BER           | RSSI          |
          +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
+[discrete]
+==== Control Flags
+[cols="2,1,2"]
+|===
+|Name |Flag |Description
+
+|Grant Demand
+|$80 (0x80)
+|This control flag indicates the packet contains a remote grant demand request.
+
+|Unit to Unit
+|$01 (0x01)
+|This control flag indicates any included control request is a unit-to-unit request.
+|=== 
+
 === 3.3 P25 Protocol Data
 For both reception and transmission of P25 protocol data on the network, simple packets are formed using the Protocol function and P25 sub-function.
 
@@ -703,6 +718,29 @@ All messages (with the exception of PDUs) carry this message header:
          |               |
          +-+-+-+-+-+-+-+-+
 
+[discrete]
+==== Control Flags
+[cols="2,1,2"]
+|===
+|Name |Flag |Description
+
+|Grant Demand
+|$80 (0x80)
+|This control flag indicates the packet contains a remote grant demand request.
+
+|Grant Denial
+|$40 (0x40)
+|This control flag indicates any included grant demand request is to be denied.
+
+|Encrypted
+|$08 (0x08)
+|This control flag indicates any included control request is for encrypted traffic to follow.
+
+|Unit to Unit
+|$01 (0x01)
+|This control flag indicates any included control request is a unit-to-unit request.
+|=== 
+
 ==== 3.3.2 PDU Message Header
 [listing]
      Below is the representation of the data layout for the P25 frame