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2) in respect of several mutilated messages.
Figure 4-3. Example of application of 4.4.11.3 procedure
Text &--= &DUPE,:========N. . N. . N. . N. . L. . U. f \ \ /
V
/ - V
Enti cd cii,ved ..l dditiutza! LETTER LETTER SI-IIIi'TS uj
rife.rsuge SHIFTS ~nnl;h e u.sed l?er.e n~e.v.sa,~e-.se,~ar.ati.osii,2@ al
to aLsLsi.vtpositionii~g and taj~qfiedse quence,
in turn-rape st(ltiufis as required
Chapter I Annex 10 - Aeronautical Telecommunications
Note 2 .Th is circumstance of detection of a mutilation
may only be possible at "torn-tape " relay stations.
4.4.11.5 When the provisions of 4.4.11.4 are applied, the
station receiving the service message shall reassume
responsibility for the referenced message. It shall then
retransmit the unmutilated copy of the referenced message
with a new (i.e. correct in sequence) transmission identification
(see 4.4.2.1.1 b)). If that station is not in possession of
an unmutilated copy of the original message, it shall take the
action prescribed in 4.4.11.1.
4.4.11.6 If, before retransmission is commenced, a relay
station detects that a received message has a recognizable but
mutilated end-of-message signal, it shall, where necessary,
repair this mutilation before retransmission.
N o t e . This circumstance of detection of a mutilation may
only he possible at "torn-tape" relay stations and the action
prescribed will be essential where messages are being
transmitted to a semi-automatic or,fully automatic station.
4.4.11.7 If, during retransmission of a message, a relay
station detects that the message has been mutilated at some
point ahead of the end-of-message signal and is able to tale
action before a correct end-of-message signal has been
transmitted, it shall:
1) cancel the transmission by inserting into the channel the
sequence ~=QTA+QTAL<= followed by a complete
ending (see 4.4.6);
2) reassume responsibility for the message;
3) comply with the provisions of 4.4.1 1.1 or 4.4.1 1.4 as
appropriate.
N o t e . This circumstance of detection of a mutilation may
only he possible at "torn-tape" relay stations or at semiautomatic
stations using continuous-tape.
4.4.11.8 If, after a message has been transmitted in toto,
a station detects that the text or the origin of the message was
mutilated or incomplete, it shall transmit to all addressees
concerned a service message with the following text, if an
unmutilated copy of the message is available in the station:
SVC CORRECTION (the origin of the incorrect message)
STOP followed by the correct text).
N o t e . This circumstance of detection of a mutilation or
incomplete message may only he possihle at "torn-tape" relay
stations or at semi-automatic stations using continuous-tape.
4.4.11.9 If, after transmission of the text of a message, a
relay station detects that the message has an obviously
mutilated end-of-message signal, it shall insert a proper endof-
message signal into the channel.
N o t e . This circumstance of detection of a mutilation may
only be possible at "torn-tape" relay stations or at semiautomatic
stations using continuous-tape.
4.4.1 1.10 If, after transmission of the text material of a
message, a relay station can detect that there is no complete
end-of-message signal, but has no practicable means of
discovering whether the irregularity has affected only the endof-
message signal or whether it may have also caused part of
the original text to have been lost, it shall insert into the
channel the following:
1) L<=CHECK=TEXT=
NEW-ENDING-ADDED-
2) its own station identification;
4) a proper ending as prescribed in 4.4.6.1.
Note I . On tape copy, this insertion will appear as
,follows:
Note 2 . On page copy, this insertion will appear as
,follows:
CHECK
TEXT
NEW ENDING ADDED LOWWYFYX
NNNN
Note 3 .Th e staggered presentation on copy is prescribed
to ensure that the attention of the addressee is dvawn
immediately to the insertion.
Note 4 .Th e FIGURE SHIFT [1'] is included to ensure
proper,functioning where Fir,st Line Monitoring Equipment is
used, where the presence of the FIGURE SHIFT in the origin
is used to cause disconnection of this equipment and where the
missing part of the message includes this FIGURE SHIFT
Note 5 .Th is circumstance of detection of a mutilation
may only he relevant to fully automatic stations or stations
using semi-automatic methods without continuous-tape.
4.4.1 1.1 1 Recommendation.- Relay stations applying
the procedural provisions of 4.4.1 1.9 or 4.4.11.1 0 should, lf
　
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