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InfoMagic Standards 1994 January
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1988
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.rs
.\" Troff code generated by TPS Convert from ITU Original Files
.\" Not Copyright ( c) 1991
.\"
.\" Assumes tbl, eqn, MS macros, and lots of luck.
.TA 1c 2c 3c 4c 5c 6c 7c 8c
.ds CH
.ds CF
.EQ
delim @@
.EN
.nr LL 40.5P
.nr ll 40.5P
.nr HM 3P
.nr FM 6P
.nr PO 4P
.nr PD 9p
.po 4P
.rs
\v | 5i'
.ce 1000
ANNEX\ B
.ce 0
.ce 1000
(to Recommendation Q.764)
.sp 9p
.RT
.ce 0
.ce 1000
\fBState transition diagrams\fR
.sp 1P
.RT
.ce 0
.PP
\fINote\fR \ \(em\ Should any conflict arise between the text and the
SDL definition, the textual description is taken as definitive.
.sp 1P
.RT
.sp 2P
.LP
B.1
\fIGeneral\fR
.sp 1P
.RT
.PP
This Annex contains the description of the signalling procedures
described in this Recommendation in the form of state transition diagrams
according to the CCITT Specification and Description Language (SDL). In
order to facilitate functional description, the ISDN User Part (ISDN\(hyUP)
signalling procedure is divided into main functional blocks, as shown in
Figure\ B\(hy1/Q.764. These blocks are as follows:
.RT
.LP
1)
\fISignalling procedure control (SPRC)\fR
.LP
SPRC provides procedures for sending ISDN\(hyUP messages to
Level 3 (SCCP or MTP) and distributing received messages to the other ISDN\(hyUP
functional blocks.
.LP
2)
\fICall processing control (CPC)\fR
.LP
CPC provides call control procedures for realizing basic
circuit switched service according to user's request.
.LP
3)
\fICircuit supervision control (CSC)\fR
.LP
CSC provides procedures for circuit supervision control for maintenance
purpose and for recovery from abnormal situation.
.sp 2P
.LP
B.2
\fIDrafting convention\fR
.sp 1P
.RT
.LP
a)
External inputs and outputs are used for interactions with a remote exchange
and interaction between SPRC and the other functional blocks. Internal
inputs and outputs are used for interactions within each functional
block, e.g.,\ to indicate control of time\(hyout. For these interactions,
input
and output symbols are used as shown in Figure\ B\(hy2/Q.764.
.LP
b)
Inputs and outputs symbols contain as part of their name
acronyms of their source and destination functional block names with an
arrow in between, e.g.,\ Blocking BLS\ \(ra\ CPC.
.LP
c)
A simple example of SDL diagram according to the above
conventions is shown in Figure\ B\(hy3/Q.764.
.sp 2P
.LP
B.3
\fIAbbreviations, timers and primitives\fR
.sp 1P
.RT
.sp 1P
.LP
B.3.1
\fIAbbreviations\fR
.sp 9p
.RT
.LP
1)
Table B\(hy1/Q.764:
.LP
Signalling procedure control.
.LP
\fR 2)
Table B\(hy2/Q.764:
.LP
Call processing control.
.LP
3)
Table B\(hy3/Q.764:
.LP
Circuit supervision control.
.sp 1P
.LP
B.3.2
\fITimers\fR
.sp 9p
.RT
.PP
Timers used in the ISDN\(hyUP SDL diagrams are shown in
Table\ B\(hy4/Q.764.
.RT
.sp 1P
.LP
B.3.3
\fIPrimitives\fR
.sp 9p
.RT
.PP
Primitives used over the interface between call control and ISDN\(hyUP
are shown in Table\ B\(hy5/Q.764.
.bp
.RT
.sp 2P
.LP
B.4
\fIState transition diagrams and SDL diagrams\fR
.sp 1P
.RT
.PP
Each ISDN\(hyUP main functional block is further subdivided into the functional
blocks. Functional diagrams and simple state transition diagrams for each
main functional block are shown below:
.RT
.LP
1)
Signalling procedure control (SPRC)
.LP
\(em
Figure B\(hy4/Q.764
.LP
Functional diagrams
.LP
\(em
Figure B\(hy5/Q.764
.LP
State transition diagrams
.LP
2)
Call processing control (CPC)
.LP
\(em
Figure B\(hy6/Q.764
.LP
Functional diagrams
.LP
\(em
Figures B\(hy7/Q.764 to B\(hy9/Q.764
.LP
State transition diagrams
.LP
3)
Circuit supervision control (CSC)
.LP
\(em
Figure B\(hy10/Q.764
.LP
Functional diagrams
.LP
\(em
Figures B\(hy11/Q.764 to B\(hy18/Q.764
.LP
State transition diagrams
.PP
The ISDN\(hyUP SDL diagrams are described based on the three\(hyblocks
approach. In this approach, call control, which provides
signalling\(hyindependent functions such as connect\(hythrough, circuit
selection and digits analysis, is outside the ISDN\(hyUP. These functions
are described only in \(sc\(sc\ 1\(hy3. The ISDN\(hyUP diagrams are provided
for the above subdivided functional blocks, as shown below:
.LP
1)
Signalling procedure control (SPRC)
.LP
\(em
Figure B\(hy19/Q.764
.LP
Message sending control
.LP
\(em
Figure B\(hy20/Q.764
.LP
Message distributing control
.LP
2)
Call processing control (CPC)
.LP
\(em
Figure B\(hy21/Q.764
.LP
Call processing control incoming (CPCI)
.LP
\(em
Figure B\(hy22/Q.764
.LP
Call processing control outgoing (CPCO)
.LP
\(em
Figure B\(hy23/Q.764
.LP
Continuity check incoming (CCI)
.LP
\(em
Figure B\(hy24/Q.764
.LP
Continuity check outgoing (CCO)
.LP
3)
Circuit supervision control (CSC)
.LP
\(em
Figure B\(hy25/Q.764
.LP
Blocking/unblocking message sending (BLS)
.LP
\(em
Figure B\(hy26/Q.764
.LP
Blocking/unblocking message reception (BLR)
.LP
\(em
Figure B\(hy27/Q.764
.LP
Maintenance oriented circuit group
blocking/unblocking sending (MGBS)
.LP
\(em
Figure B\(hy28/Q.764
.LP
Blocking/unblocking reception (MGBR)
.LP
\(em
Figure B\(hy29/Q.764
.LP
Hardware failure oriented locally
blocking state (HLB)
.LP
\(em
Figure B\(hy30/Q.764
.LP
Hardware failure oriented remotely
blocking state (HRB)
.LP
\(em
Figure B\(hy31/Q.764
.LP
Hardware failure oriented circuit
group blocking/unblocking sending (HGBS):
.bp
.LP
\(em
Figure B\(hy32/Q.764
.LP
Hardware failure oriented circuit
\fR group blocking/unblocking reception (HGBR)
.LP
\(em
Figure B\(hy33/Q.764
.LP
Circuit reset sending (CRS)
.LP
\(em
Figure B\(hy34/Q.764
.LP
Circuit reset reception (CRR)
.LP
\(em
Figure B\(hy35/Q.764
.LP
Circuit group reset sending (CGRS)
.LP
\(em
Figure B\(hy36/Q.764
.LP
Circuit group reset reception (CGRR)
.LP
\(em
Figure B\(hy37/Q.764
.LP
Continuity recheck sending (CRCS)
.LP
\(em
Figure B\(hy38/Q.764
.LP
Continuity recheck reception (CRCR)
.LP
\(em
Figure B\(hy39/Q.764
.LP
Circuit group query sending (CQS)
.LP
\(em
Figure B\(hy40/Q.764
.LP
Circuit group query reception (CQR)
.LP
.rs
.sp 28P
.ad r
\fBFigure B\(hy1/Q.764, (N), p.\fR
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.LP
.rs
.sp 47P
.ad r
\fBFigure B\(hy2/Q.764, (N), p. 2\fR
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.LP
.rs
.sp 47P
.ad r
\fBFigure B\(hy3/Q.764, (N), p. 3\fR
.sp 1P
.RT
.ad b
.RT
.LP
.bp
.ce
\fBH.T. [T4.764]\fR
.ce
TABLE\ B\(hy1B/FQ.764
.ce
\fBSignalling procedure control acronym\fR
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
lw(36p) | cw(30p) | cw(162p) .
Acronym Description
_
.T&
lw(36p) | lw(30p) | lw(162p) .
BLR {
Blocking/Unblocking Message Reception
}
.T&
lw(30p) | lw(162p) .
BLS {
Blocking/Unblocking Message Sending
}
.T&
lw(30p) | lw(162p) .
CCO Continuity Check Outgoing
.T&
lw(30p) | lw(162p) .
CCI Continuity Check Incoming
.T&
lw(30p) | lw(162p) .
CGRS Circuit Group Reset Sending
.T&
lw(30p) | lw(162p) .
CGRR Circuit Group Reset Reception
.T&
lw(30p) | lw(162p) .
CPC Call Processing Control
.T&
lw(30p) | lw(162p) .
CRR Circuit Reset Reception
.T&
lw(30p) | lw(162p) .
CRS Circuit Reset Sending
.T&
lw(36p) | lw(30p) | lw(162p) .
Functional CSC Circuit Supervision Control
.T&
lw(36p) | lw(30p) | lw(162p) .
block name SPRC Signalling Procedure Control
.T&
lw(30p) | lw(162p) .
MGBR {
Maintenance Oriented Circuit Group Blocking/Unblocking
Reception
}
.T&
lw(30p) | lw(162p) .
HGBR {
Hardware Failure Oriented Circuit Group Blocking/Unblocking
Reception
}
.T&
lw(30p) | lw(162p) .
MGBS {
Maintenance Oriented Circuit Group Blocking/Unblocking
Sending
}
.T&
lw(30p) | lw(162p) .
HGBS {
Hardware Failure Oriented Circuit Group Blocking/Unblocking
Sending
}
.T&
lw(30p) | lw(162p) .
CRCR {
Continuity Recheck Control Reception
}
.T&
lw(30p) | lw(162p) .
CRCS {
Continuity Recheck Control Sending
}
.T&
lw(30p) | lw(162p) .
CQR Circuit Group Query Reception
.T&
lw(30p) | lw(162p) .
CQS Circuit Group Query Sending
.T&
lw(30p) | lw(162p) .
MSDC Message Sending Control
.T&
lw(30p) | lw(162p) .
MDSC Message Distributing Control
.T&
lw(36p) | lw(30p) | lw(162p) .
.T&
lw(36p) | lw(30p) | lw(162p) .
BLA Blocking Acknowledgement
.T&
lw(30p) | lw(162p) .
BLO Blocking
.T&
lw(30p) | lw(162p) .
GRA Group Reset Acknowledgement
.T&
lw(30p) | lw(162p) .
GRS Group Reset
.T&
lw(30p) | lw(162p) .
CQR Circuit Group Query Response
.T&
lw(30p) | lw(162p) .
CQM Circuit Group Query
.T&
lw(30p) | lw(162p) .
UBA Unblocking Acknowledgement
.T&
lw(36p) | lw(30p) | lw(162p) .
Message type UBL Unblocking
.T&
lw(30p) | lw(162p) .
CCR Continuity Check Request
.T&
lw(30p) | lw(162p) .
CGB Circuit Group Blocking
.T&
lw(30p) | lw(162p) .
CGBA {
Circuit Group Blocking Acknowledgement
}
.T&
lw(30p) | lw(162p) .
CGU Circuit Group Unblocking
.T&
lw(30p) | lw(162p) .
CGUA {
Circuit Group Unblocking Acknowledgement
}
.T&
lw(30p) | lw(162p) .
RSC Reset Circuit
.T&
lw(30p) | lw(162p) .
CFN Confusion
.T&
lw(228p) .
.TE
.nr PS 9
.RT
.ad r
\fBTableau B\(hy1/Q.764 [T4.764], p. 4\fR
.sp 1P
.RT
.ad b
.RT
.LP
.sp 4
.bp
.ce
\fBH.T. [T5.764]\fR
.ce
TABLE\ B\(hy2B/FQ.764
.ce
\fBCall processing control acronym\fR
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
lw(36p) | cw(30p) | cw(162p) .
Acronym Description
_
.T&
lw(36p) | lw(30p) | lw(162p) .
OGC Outgoing Trunk Circuit
.T&
lw(36p) | lw(30p) | lw(162p) .
General ICC Incoming Trunk Circuit
.T&
lw(36p) | lw(30p) | lw(162p) .
CCH Continuity Check Indicator
_
.T&
lw(36p) | lw(30p) | lw(162p) .
CC Call control
.T&
lw(30p) | lw(162p) .
SPRC Signalling Procedure Control
.T&
lw(30p) | lw(162p) .
CPC Call Processing Control
.T&
lw(30p) | lw(162p) .
BLR {
Blocking/Unblocking Message Reception
}
.T&
lw(30p) | lw(162p) .
BLS {
Blocking/Unblocking Message Sending
}
.T&
lw(30p) | lw(162p) .
CCO Continuity Check Outgoing
.T&
lw(30p) | lw(162p) .
CCI Continuity Check Incoming
.T&
lw(30p) | lw(162p) .
CGRR {
Circuit Group Reset Reception
\fR
}
.T&
lw(36p) | lw(30p) | lw(162p) .
Functional CRR Circuit Reset Reception
.T&
lw(36p) | lw(30p) | lw(162p) .
block name CRS Circuit Reset Sending
.T&
lw(30p) | lw(162p) .
CPCI {
Call Processing Control Incoming
\fR
}
.T&
lw(30p) | lw(162p) .
CPCO {
Call Processing Control Outgoing
}
.T&
lw(30p) | lw(162p) .
MGBR {
Maintenance Oriented Circuit Group Unblocking/Blocking
Reception
}
.T&
lw(30p) | lw(162p) .
HGBR {
Hardware Failure Oriented Circuit Group Blocking/Unblocking
Reception
}
.T&
lw(30p) | lw(162p) .
MGBS {
Maintenance Oriented Circuit Group Unblocking/Blocking
Sending
}
.T&
lw(30p) | lw(162p) .
HGBS {
Hardware Failure Oriented Circit Group Blocking/Unblocking
Sending
}
.T&
lw(30p) | lw(162p) .
CRCR Continuity Recheck Reception
.T&
lw(30p) | lw(162p) .
CRCS Continuity Recheck Sending
.T&
lw(36p) | lw(30p) | lw(162p) .
.T&
lw(36p) | lw(30p) | lw(162p) .
ACM Address Complete
.T&
lw(30p) | lw(162p) .
ANM Answer
.T&
lw(30p) | lw(162p) .
COT Continuity
.T&
lw(30p) | lw(162p) .
CPG Call Progress
.T&
lw(30p) | lw(162p) .
IAM Initial Address
.T&
lw(36p) | lw(30p) | lw(162p) .
Message type SUS {
Suspend (network\(hyor user\(hyinitiated)
}
.T&
lw(30p) | lw(162p) .
RES {
Resume (network\(hyor user\(hyinitiated)
}
.T&
lw(30p) | lw(162p) .
REL Release
.T&
lw(30p) | lw(162p) .
RLC Release Complete
.T&
lw(30p) | lw(162p) .
FOT Forward Transfer
.T&
lw(30p) | lw(162p) .
SAM Subsequent Address
.T&
lw(30p) | lw(162p) .
CON Connect
.T&
lw(228p) .
.TE
.nr PS 9
.RT
.ad r
\fBTableau B\(hy2/Q.764 [T5.764], p. 5\fR
.sp 1P
.RT
.ad b
.RT
.LP
.sp 6
.bp
.ce
\fBH.T. [T6.764]\fR
.ce
TABLE\ B\(hy3B/FQ.764
.ce
\fBCircuit supervision control acronym\fR
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
lw(36p) | cw(30p) | cw(162p) .
Acronym Description
_
.T&
lw(36p) | lw(30p) | lw(162p) .
BLR {
Blocking/Unblocking Reception
}
.T&
lw(30p) | lw(162p) .
BLS Blocking/Unblocking Sending
.T&
lw(30p) | lw(162p) .
CRS Circuit Reset Sending
.T&
lw(30p) | lw(162p) .
CRR Circuit Reset Reception
.T&
lw(30p) | lw(162p) .
CGRS Circuit Group Reset Sending
.T&
lw(30p) | lw(162p) .
CGRR Circuit Group Reset Reception
.T&
lw(30p) | lw(162p) .
MGBR {
Maintenance Oriented Circuit Group Blocking/Unblocking
Reception
}
.T&
lw(36p) | lw(30p) | lw(162p) .
Functional HGBR {
Hardware Failure Oriented Circuit Group Blocking/Unblocking
Reception
}
.T&
lw(36p) | lw(30p) | lw(162p) .
block name MGBS {
Maintenance Oriented Circuit Group Blocking/Unblocking
Sending
}
.T&
lw(30p) | lw(162p) .
HGBS {
Hardware Failure Oriented Circuit Group Blocking/Unblocking
Sending
}
.T&
lw(30p) | lw(162p) .
CRCR Continuity Recheck Reception
.T&
lw(30p) | lw(162p) .
CRCS Continuity Recheck Sending
.T&
lw(30p) | lw(162p) .
CQR Circuit Group Query Reception
.T&
lw(30p) | lw(162p) .
CQS Circuit Group Query Sending
.T&
lw(30p) | lw(162p) .
HRB {
Hardware Failure Oriented Remotely Blocking
}
.T&
lw(30p) | lw(162p) .
HLB {
Hardware Failure Oriented Locally Blocking State
}
.T&
lw(36p) | lw(30p) | lw(162p) .
.T&
lw(36p) | lw(30p) | lw(162p) .
BLA Blocking Acknowledgement
.T&
lw(30p) | lw(162p) .
BLO Blocking
.T&
lw(30p) | lw(162p) .
COT Continuity
.T&
lw(30p) | lw(162p) .
CQR {
Circuit Group Query Response
\fR
}
.T&
lw(30p) | lw(162p) .
CQM Circuit Group Query \fR
.T&
lw(30p) | lw(162p) .
GRA Group Reset Acknowledgement
.T&
lw(30p) | lw(162p) .
GRS Group Reset
.T&
lw(30p) | lw(162p) .
RLC Release Complete
.T&
lw(36p) | lw(30p) | lw(162p) .
Message type RSC Reset Circuit
.T&
lw(30p) | lw(162p) .
UBA Unblocking Acknowledgement
.T&
lw(30p) | lw(162p) .
UBL Unblocking
.T&
lw(30p) | lw(162p) .
CGB Circuit Group Blocking
.T&
lw(30p) | lw(162p) .
CGBA {
Circuit Group Blocking Acknowledgement
}
.T&
lw(30p) | lw(162p) .
CCR Continuity Check Request
.T&
lw(30p) | lw(162p) .
CGU Circuit Group Unblocking
.T&
lw(30p) | lw(162p) .
CGUA {
Circuit Group Unblocking Acknowledgement
}
.T&
lw(30p) | lw(162p) .
REL Release
.T&
lw(228p) .
.TE
.nr PS 9
.RT
.ad r
\fBTableau B\(hy3/Q.764 [T6.764], p. 6\fR
.sp 1P
.RT
.ad b
.RT
.LP
.sp 7
.bp
.ce
\fBH.T. [T7.764]\fR
.ce
TABLE\ B\(hy4B/FQ.764
.ce
\fBTimer\fR
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(138p) | cw(30p) | cw(60p) .
Timer Symbol Time\(hyout value
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First RLC timer T1\ 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second RLC timer T5\ 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
RES timer (network) T6\ Covered in Q.118
_
.T&
lw(138p) | cw(30p) | lw(60p) .
ACM timer T7\ 20\(hy30 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
COT timer T8\ 10\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
ANM timer T9\ Interval specified in Q.118
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First BLA timer T12 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second BLA timer T13 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First UBA timer T14 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second UBA timer T15 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First RSC response timer T16 4\(hy5 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second RSC response timer T17 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First CGBA timer T18 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second CGBA timer T19 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First CGUA timer T20 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second CGUA timer T21 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
First GRA timer T22 4\(hy15 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Second GRA Timer T23 1 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
Continuity tone timer T24 \(= 2 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
CCR timing timer T25 1\(hy10 s
_
.T&
lw(138p) | cw(30p) | lw(60p) .
CCR response timer T26 1\(hy3 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
CCR receive timer T27 4 min
_
.T&
lw(138p) | cw(30p) | lw(60p) .
CQR timer T28 10 s
_
.TE
.nr PS 9
.RT
.ad r
\fBTableau B\(hy4/Q.764 [T7.764], p. 7\fR
.sp 1P
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TABLE\ B\(hy5B/FQ.764
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Primitive ISDN\(hyUP message Interface \fR
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SETUP IAM ANM, CON REL, RLC
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RESET {
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PROC ACM (Other)
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ALERT CPG, ACM (Subscriber free)
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INFO SAM
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RESUMED RES
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UNBLOCKING UBL, UBA CGU, CGUA
.T&
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CCT GROUP QUERY CQM, CQR
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CONTINUITY RECHECK CCR
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RESET GRS, GRA RSC, RLC
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\fBTableau B\(hy5/Q.764 [1T8.764], p. 8\fR
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.ps 9
.vs 11
.nr VS 11
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Primitive ISDN\(hyUP message Interface \fR
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{
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_
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