2.2.4.1 RTS PDUs Naming and Document Conventions

All definitions in this section share some common naming conventions. An RTS PDU can be one of three types. It can be used by a single protocol sequence only; it can be used in more than one protocol sequence; or it can be used outside a protocol sequence. If the RTS PDU is specific to a single protocol sequence, the name of the PDU is created by using a strict convention that allows for an RTS PDU to be associated quickly with its place in the protocol sequence. The name of the RTS PDU is not reflected on the network and thus has no protocol significance other than making it easier to find and understand information in this specification. The name of this type of RTS PDU follows the format shown here.

 RTS-PDU-name = protocol-sequence-name "/" group-name group-order
 protocol-sequence-name = "CONN" / "IN_R1" / "IN_R2" / "OUT_R1" /
  "OUT_R2"
 group-name = "A" / "B" / "C"
 group-order = 1*(DIGIT)

The names of the protocol sequences are given in sections 3.2.1.5.3.1 through 3.2.1.5.3.5 of this specification. The group-name is a group of PDUs within the protocol sequence, and the name and meaning of the group is defined in the section for the respective protocol sequence. The group-order is a number that starts at 1 and is incremented sequentially for each RTS PDU in the group. For example, CONN/A1 is the first RTS PDU from group A from protocol sequence CONN.

If an RTS PDU is used in more than one protocol sequence or is used outside a protocol sequence, the convention defined earlier is not used. Instead, the name of the PDU is descriptive of the meaning of the PDU and is not associated in any way with the protocol sequences in which it is used.

As defined in section 2.2.3.6, an RTS PDU is composed of an RTS PDU header and one or more RTS PDU commands.

RTS PDUs are uniquely identified by the combination of the following: the Flags field in the RTS header, the number of commands, and the command types. However, there are only a small number of RTS PDUs that are legal on each channel in each state, so while there are a large number of RTS PDUs, a receiver only has to check a small number of possibilities when an RTS PDU is received on a given channel in a given state. See the section on each RTS PDU under section 2.2.4 for the channel, Flags field, number of commands, and the command types for that RTS PDU, and the section on receiving each RTS PDU under section 3 for the states.

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