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be directly mapped into the called address extension and
calling address extension parameter fields in the incoming call
packet.
4.7.3.16.3.2 The called NSAP address field in thc
connection confirm or connection released SNPDU shall be
mapped into the called address extension field in the call
connected or clear indication packet.
The Q number associated with the connection request and
connection confirm SNPDUs shall be mapped into the target
and selected values of the priority of data on a connection field
in the priority facility in the IS0 8208 incoming call and call
connected packets.
4.7.3.16.5 THROUGHPUTC LASS NEGOTZATION
4.7.3.16.5.1 The throughput class negotiation shall apply
independently for each direction of transfer.
4.7.3.16.5.2 Throughput
The throughput sub-parameter shall be defined as one of the
values (unspecified, 75, 150, 300, 600, 1 200, 2 400, 4 800,
9 600, 19 200, 48 000, 64 000 bitsls).
4.7.3.16.6 TRANSIT DELAY
4.7.3.16.6.1 The negotiated transit delay shall apply to
both directions of transfer.
4.7.3.16.6.2 Aircrafr-originated connection establishment
4.7.3.16.6.2.1 If the SSNDPG receives a connection
request SNPDU from an SSNDPA with TDSAI facility, the
SSNDPG shall forward to the IWF a mean value for satellite
subnetwork transit delay of a data SNPDU of 131 octets in the
incoming call packet.
4.7.3.16.6.2.2 The SSNDPA shall map directly the
TDSAI facility in the connection confirm SNPDU to the same
facility in the call connected packet.
4.7.3.16.6.3 Ground-originated connection establishment
4.7.3.16.6.3.1 The SSNDPA shall map directly the
TDSAI facility in the connection request SNPDU to the same
facility in the incoming call packet.
4,7.3.16.6.3.2 If the SSNDPG receives a connection
confirm SNPDU from the SSNDPA in response to a
connection request SNPDU with TDSM facility, it shall
forward the same facility in the call connected packet to the
IWF.
4.7.3.16.7 FAST SELECT
The fast select facility shall be treated as follows:
a) a connection request with no restriction on response
SNPDU with the fast select (use not permitted) facility
shall be mapped into rn incoming call packet without
the fast select facility;
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No. 75
Annex 10 - Aeronautical Telecommunications Volume 112
b) a connection request with no restriction on response
SNPDU without the fast select (use not permitted)
facility shall be mapped into an incoming call packet
with the fast select facility with the "no restriction on
response" parameter;
c) a connection request with restriction on response
SNPDU without the fast select (use not permitted)
facility shall be mapped into an incoming call packet
with the fast select facility with the "restriction on
response" parameter.
4.7.3.16.8 EXPEDITED DATA NEGO'TIA77ON
4.7.4.1.2 PACKET LAYER EhTlTY
Note.- Wr'thin the IS0 8208 DCE there may be more than
one DCEh9TE intellface, e.g. a GES may be connected to more
than one ground ATN muter One such entity exists in the WCE
for each DCEDTE intelfnce. Deciding which entity to use to
reach a particular destination is a function pefonned external
to the protocol described here. The protocol depned in 4.7.4
peHaim to each packet layer entity in the DCE.
4.7.4.2 CONFORMANCREEQ UIREMENTS
4.7.4.2.1 SUPPORTED SERVICES AND CAPABILITIES
~f the expedited data negotiation facility is present in the The following Services md capabilities shall be supported:
connection request or connection confirm SNPDU, this facility
with its parameter set to "use of expedited data" shall be added a) virtual call service;
to the corresponding incoming cail or call connected packet;
otherwise, this facility shall be mapped to the corresponding b) a user data field of up to 128 octets in data packets; and
packet. c) expedited data delivery, i.e. the use of interrupt packets
with a user data field of up to 32 octets.
4.7.3.16.9 CAUSEA ND DIAGNosTK CODES
4.7.4.2.2 SUPPORTED FACILITIES
Clearing cause, resetting cause and diagnostic code fields shall
be transferred without modification from the SNPDUs to the The following facilities shall be supported:
corresponding packets.
a) calling address extension and called address extension:
and
4.7.3.16.10 DATA
b) priority.
4.7.3.16.10.1 If the user data field in the data SNPDUs of
an M-bit SNPDU sequence is less than the default data packet Note.- The target utd lowest acccptahle values for the
user data field length, then these fields be ~riorifY to gain a connection and keep a connection, and the
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