Section: 10.4 Message Type
Content: The message type IE and its use are defined in 3GPP TS 24.007[ Mobile radio interface signalling layer 3; General Aspects ]  [20]. Tables 10.3/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] , 10.4/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] , and 10.4a/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  define the value part of the message type IE used in the Mobility Management protocol, the Call Control protocol, and Session management protocol. Table 10.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Message types for Mobility Management NOTE: This value was allocated but never used in earlier phases of the protocol. When the radio connection started with a core network node of earlier than R99, bit 8 shall be set to 0 and bit 7 is reserved for the send sequence number in messages sent from the mobile station. In messages sent from the network, bits 7 and 8 are coded with a "0". See 3GPP TS 24.007[ Mobile radio interface signalling layer 3; General Aspects ]  [20]. When the radio connection started with a core network node of R'99 or later, bits 7 and 8 are reserved for the send sequence number in messages sent from the mobile station. In messages sent from the network, bits 7 and 8 are coded with a "0". See 3GPP TS 24.007[ Mobile radio interface signalling layer 3; General Aspects ]  [20]. Table 10.3/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Message types for Call Control and call related SS messages 1): When used, the message type is defined in the following octet(s), according to the national specification. When the radio connection started with a core network node of earlier than R99, bit 8 shall be set to 0 and bit 7 is reserved for the send sequence number in messages sent from the mobile station. In messages sent from the network, bits 7 and 8 are coded with a "0". See 3GPP TS 24.007[ Mobile radio interface signalling layer 3; General Aspects ]  [20]. When the radio connection started with a core network node of R'99 or later, bits 7 and 8 are reserved for the send sequence number in messages sent from the mobile station. In messages sent from the network, bits 7 and 8 are coded with a "0". See 3GPP TS 24.007[ Mobile radio interface signalling layer 3; General Aspects ]  [20]. Table 10.4/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Message types for GPRS mobility management Table 10.4a/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Message types for GPRS session management