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Part I Annex 10 - Aeronautical Telecommunications
field, which shall indicate the code for the facility or facilities
requested. The remaining octets of a facility element shall
contain the facility parameter field.
4.7.3.10.13.3 Recommended facilities
Recommendation.- The following facilities should be
supported by the SSNDPX:
a) throughput class negotiation;
b) transit delay selection and indication; and
C) fast select.
4.7.3.13 STATE TABLES
4.7.3.13.1 Action taken in any state of the SSNDPX shall
be given by Tables 4-21 to 4-24.
4.7.3.13.2 The following conventions shall be used in the
state tables:
a) action taken, which could be:
- normal, as defined in 4.7.3.5 to 4.7.3.8;
- discard the received SNPDU and take no subsequent
action as a result of receiving that SNPDU;
4.7.3.10.13.4 Throughput class negotiation (TCN) - error, as defined in the table;
facility format
b) D = the diagnostic code contained in the diagnostic code
The format of the throughput class negotiation (TCN) facility field of the appropriate SNPDU (connection released, or
field shall be as defined in Figure 4-25. reset) issued upon the detection of the indicated error.
4.7.3.10.13.5 Transit delay selection and indication
(TDSAI) facility format
The format of the transit delay selection and indication facility
4.7.3.14 SATELLITSEU BNETWORK
DEPENDENT TO LINK LAYER
INTERFACE FUNCTIONS
field shall be as defined in ~ k u r4e- 26.
4.7.3.14.1 The interface functions to the link layer shall
4.7.3.10.13.6 Fast seIect facility fonnat include the following:
The fast select facility format shall be as defined in a) and reception of link interface data units
Figure 4-27. (3Jlx.J~);
4.7.3.10.13.7 Expedited data ntgotiation b) routing of received SNPDUs according to connection;
The expedited data negotiation facility format shall be as
c) selection of further SNPDUs for transmission according
defined in Figure 4-28. to a cyclic order of selecting among the logical channels
at a given Q number and giving precedence to interrupt
SNP~UoSv er data SNPDUs of the same Q number; and
4.7.3.10.14 DIAGNOS~CO DES d) routing of local acknowledgement (success/fail) for RLS
transmission status indication LIDUs.
When connection releaselreset is initiated by the SSNDPX, the
coding of the diagnostic code field in the connection released 4.7.3.14.2 The LIDUs passed between the SSNDPX and
and reset SNPDUs shall be as defined in Table 4-17. the link layer shall include the LIDUs defined in Table 4-25.
4.7.3.1 1 TIMER VALUES 4.7.3.15 PACKETTO SNPDU
The timer values shall be as defined in Table 4-20. MAPPING RULES
4.7.3.15.1 The rules for mapping the IS0 8208 packet
4.7.3.1 2 STATE DIAGRAMS fields into the corresponding fields in SNPDU shall be as
specified in this section.
State diagrams for the following states shall be given below:
a) The state diagram for connection establishment/release 4.7.3.15.2 DTE ADDRESSES
of a logical channel shall be as defined in Figure 4-29.
4.7,3.15.2.1 The called-DTE address and the calling-DTE
b) The state diagram for reset and flow control states address fields in the IS0 8208 call request packet shall be
within the data transfer state shall be as defined in directly mapped into the called..DE address and the calling-
Figure 4-30. DTE address fields in the connection request SNPDU.
2/11/00
No. 75
Annex 10 - Aeronautical Telecommunications Volume ZZI
4.7.3.15.2.2 - The calling- and called-DTE addresses in the 4.7.3.15.6 ~ ~ N SDIELTA Y
IS0 8208 call accepted packet shall not be transmitted across
the satellite link, 4.7.3.15.6.1 The negotiated transit delay shall apply to
both directions of transfer.
4.7.3.15.3 NSAP ADDRESS
4.7.3.15.3.1 The called address extension and the calling
address extension parameter fields in the IS0 8208 call request
packet shall be directly mapped into the called NSAP address
and the calling NSAP address fields in the connection request
SNPDU.
4.7.3.15.3.2 If the calIed address extension parameter in
either the IS0 8208 call accepted packet or clear request
packet is equal to the called NSAP address of the
corresponding connection request SNPDU, then the called
address extension shall not be transmitted across the satellite
link: otherwise, it shall be directly mapped into the relevant
SNPDU.
4.7.3.15.4 SUBNETWORK CONNECTION PRIORITY
4.7.3.15.4.1 The target value for the priority of data on a
connection in the IS0 8208 call request packet shall be
mapped to the LIDU Q number passed to the link layer as
defined in Table 4-26. This value shall he used as long as the
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