SIST ETS 300 417-5-1 E1:2003
(Main)Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 5-1: Plesiochronous Digital Hierarchy (PDH) path layer functions
Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 5-1: Plesiochronous Digital Hierarchy (PDH) path layer functions
Functional requirements for PDH path layers of PDH interfaces on all t ypes of equipment based on the generic principles described in part 1- 1.
Prenos in multipleksiranje (TM) – Generične zahteve za prenosno funkcionalnost opreme – 5-1. del: Funkcije plasti poti pri pleziohroni digitalni hierarhiji (PDH)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2003
3UHQRVLQPXOWLSOHNVLUDQMH 70 ±*HQHULþQH]DKWHYH]DSUHQRVQRIXQNFLRQDOQRVW
RSUHPH±GHO )XQNFLMHSODVWLSRWLSULSOH]LRKURQLGLJLWDOQLKLHUDUKLML 3'+
Transmission and Multiplexing (TM); Generic requirements of transport functionality of
equipment; Part 5-1: Plesiochronous Digital Hierarchy (PDH) path layer functions
Ta slovenski standard je istoveten z: ETS 300 417-5-1 Edition 1
ICS:
33.040.20 Prenosni sistem Transmission systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN ETS 300 417-5-1
TELECOMMUNICATION March 1998
STANDARD
Source: TM Reference: DE/TM-01015-5-1
ICS: 33.020
Key words: PDH, SDH, transmission, transport, path
Transmission and Multiplexing (TM);
Generic requirements of transport functionality of equipment;
Part 5-1: Plesiochronous Digital Hierarchy (PDH)
path layer functions
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1998. All rights reserved.
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ETS 300 417-5-1: March 1998
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.
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ETS 300 417-5-1: March 1998
Contents
Contents .3
Foreword .7
Introduction.7
1 Scope .9
2 References.9
3 Definitions, abbreviations and symbols.10
3.1 Definitions .10
3.2 Abbreviations .10
3.3 Symbols and Diagrammatic Conventions.13
4 P4e path layer functions.14
4.1 P4e connection functions.16
4.2 P4e trail termination functions .17
4.2.1 P4e trail termination source P4e_TT_So .17
4.2.2 P4e trail termination sink P4e_TT_Sk.18
4.3 P4e adaptation functions .20
4.3.1 P4e to P31x adaptation source P4e/P31x_A_So/i .20
4.3.2 P4e to P31x Adaptation Sink P4e/P31x_A_Sk/i.22
4.3.3 P4e to P31e adaptation source P4e/P31e_A_So/i.24
4.3.4 P4e to P31e adaptation sink P4e/P31e_A_Sk/i .26
4.3.5 P4e to P31s adaptation source P4e/P31s_A_So/i .28
4.3.6 P4e to P31s adaptation sink P4e/P31s_A_Sk/i.30
4.4 P4e layer monitoring functions.33
4.4.1 P4e layer non-intrusive monitoring function P4em_TT_Sk.33
4.5 P4e PDH equipment clock adaptation source P4e_PEC .35
5 P31e path layer functions.36
5.1 P31e connection functions.37
5.2 P31e trail termination functions .38
5.2.1 P31e trail termination source P31e_TT_So .38
5.2.2 P31e trail termination sink P31e_TT_Sk.39
5.3 P31e adaptation functions .41
5.3.1 P31e to P22x adaptation source P31e/P22x_A_So/i .41
5.3.2 P31e to P22x adaptation sink P31e/P22x_A_Sk/i.43
5.3.3 P31e to P22e adaptation source P31e/P22e_A_So/i.45
5.3.4 P31e to P22e adaptation sink P31e/P22e_A_Sk/i .47
5.4 P31e layer monitoring functions.49
5.4.1 P31e layer non-intrusive monitoring function P31em_TT_Sk.49
5.5 P31e PDH equipment clock adaptation source P31e_PEC .51
6 P22e path layer functions.52
6.1 P22e connection functions.53
6.2 P22e trail termination functions .54
6.2.1 P22e trail termination source P22e_TT_So .54
6.2.2 P22e trail termination sink P22e_TT_Sk.55
6.3 P22e adaptation functions .57
6.3.1 P22e to P12x adaptation source P22e/P12x_A_So/i .57
6.3.2 P22e to P12x adaptation sink P22e/P12x_A_Sk/i.59
6.3.3 P22e to P12s adaptation source P22e/P12s_A_So/i .61
6.3.4 P22e to P12s adaptation sink P22e/P12s_A_Sk/i.63
6.4 P22e layer monitoring functions.65
6.4.1 P22e layer non-intrusive monitoring function P22em_TT_Sk.65
6.5 P22e PDH equipment clock adaptation source P22e_PEC .67
7 P12s path layer functions .68
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ETS 300 417-5-1: March 1998
7.1 P12s connection functions . 71
7.2 P12s trail termination functions . 72
7.2.1 P12s trail termination source P12s_TT_So. 72
7.2.2 P12s trail termination sink P12s_TT_Sk. 74
7.3 P12s adaptation functions. 77
7.3.1 P12s to P0-31c adaptation source P12s/P0-31c_A_So . 77
7.3.2 P12s to P0-31c adaptation sink P12s/P0-31c_A_Sk. 78
7.3.3 P12s to SD adaptation source P12s/SD_A_So. 79
7.3.4 P12s to SD adaptation sink P12s/SD_A_Sk. 79
7.3.5 P12s to ATM VP compound adaptation source P12s/Avp_A_So . 79
7.3.6 P12s to ATM VP compound adaptation sink P12s/Avp_A_Sk. 79
7.3.7 P12s Layer Clock adaptation source P12s-LC_A_So . 79
7.4 P12s layer monitoring functions . 80
7.4.1 P12s layer non-intrusive monitoring function P12sm_TT_Sk. 80
8 P31s path layer functions . 82
8.1 P31s connection functions . 83
8.2 P31s trail termination functions . 84
8.2.1 P31s trail termination source P31s_TT_So. 84
8.2.2 P31s trail termination sink P31s_TT_Sk. 86
8.3 P31s adaptation functions. 88
8.3.1 P31s layer to VC-12, VC-11 layer compound adaptation source function
P31s/SX_A_So . 88
8.3.1.1 P31s layer to TUG adaptation source function
P31s/TUG_A_So . 90
8.3.1.2 TUG termination source function TUG_T_So. 92
8.3.1.3 TUG to VC-12 layer adaptation source function
TUG/S12_A_So/M . 93
8.3.1.4 TUG to VC-11 layer adaptation source function
TUG/S11_A_So/M . 96
8.3.2 P31s layer to VC-12, VC-11 layer compound adaptation sink function
P31s/SX_A_Sk . 100
8.3.2.1 P31s layer to TUG adaptation sink function
P31s/TUG_A_Sk. 102
8.3.2.2 TUG termination sink function TUG_T_Sk . 104
8.3.2.3 TUG to VC-12 layer adaptation sink function
TUG/S12_A_Sk/M . 105
8.3.2.4 TUG to VC-11 layer adaptation sink function
TUG/S11*_A_Sk/M . 107
8.3.3 P31s layer to P0s layer adaptation source P31s/P0s_A_So . 109
8.3.4 P31s layer to P0s layer adaptation sink P31s/P0s_A_Sk. 110
8.3.5 P31s to V0x adaptation source P31s/V0x_A_So. 111
8.3.6 P31s to V0x adaptation sink P31s/V0x_A_Sk . 112
8.3.7 P31s to DCC adaptation source P31s/DCC_A_So . 113
8.3.8 P31s to DCC adaptation sink P31s/DCC_A_Sk. 114
8.3.9 P31s to SD adaptation source P31s/SD_A_So. 115
8.3.10 P31s to SD adaptation sink P31s/SD_A_Sk. 115
8.3.11 P31s to ATM VP compound adaptation source P31s/Avp_A_So . 115
8.3.12 P31s to ATM VP compound adaptation sink P31s/Avp_A_Sk. 115
8.3.13 P31s Layer Clock adaptation source P31s-LC_A_So . 115
8.4 P31s layer monitoring functions . 116
8.4.1 P31s non-intrusive monitoring function P31sm_TT_Sk . 116
8.5 P31s layer trail protection functions . 118
8.6 P31s tandem connection sublayer functions. 119
8.6.1 P31s tandem connection trail termination source function (P31sD_TT_So)119
8.6.2 P31s tandem connection trail termination sink function (P31sD_TT_Sk) . 122
8.6.3 P31s tandem connection to p31s adaptation source function
(P31sD/P31s_A_So). 127
8.6.4 P31s tandem connection to p31s adaptation sink function
(P31sD/P31s_A_Sk). 128
8.6.5 P31s tandem connection non-intrusive trail termination sink function
(P31sDm_TT_Sk). 129
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9 P4s path layer functions .133
9.1 P4s connection functions.134
9.2 P4s trail termination functions.135
9.2.1 P4s trail termination source P4s_TT_So.135
9.2.2 P4s trail termination sink P4s_TT_Sk .137
9.3 P4s adaptation functions.139
9.3.1 P4s layer to VC-3, VC-2, VC-12, and VC-11 layer compound adaptation
source function P4s/SX-TUG3_A_So .139
9.3.1.1 P4s layer to TUG3 adaptation source function
P4s/TUG3_A_So .141
9.3.1.2 TUG3 trail termination source function TUG3_T_So.143
9.3.1.3 TUG3 to VC-3 layer adaptation source function
TUG3/S3_A_So/K.0.0.144
9.3.1.4 TUG3 to VC-2 layer adaptation source function
TUG3/S2_A_So/K.L.0.147
9.3.1.5 TUG3 to VC-12 layer adaptation source function
TUG3/S12_A_So/K.L.M.150
9.3.1.6 TUG3 to VC-11 layer adaptation source function
TUG3/S11*_A_So/K.L.M .153
9.3.2 P4s layer to VC-3, VC-2, VC-12, and VC-11 layer compound adaptation
sink function P4s/SX-TUG3_A_Sk.157
9.3.2.1 P4s layer to TUG3 adaptation sink function
P4s/TUG3_A_Sk .159
9.3.2.2 TUG3 trail termination sink function TUG3_T_Sk .161
9.3.2.3 TUG3 to VC-3 layer adaptation sink function
TUG3/S3_A_Sk/K.0.0.162
9.3.2.4 TUG3 to VC-2 layer adaptation sink function
TUG3/S2_A_Sk .164
9.3.2.5 TUG3 to VC-12 layer adaptation sink function
TUG3/S12_A_Sk/K.L.M.166
9.3.2.6 TUG3 to VC-11 layer adaptation sink function
TUG3/S11*_A_Sk/K.L.M .168
9.3.3 P4s layer to VC-2, VC-12, and VC-11 layer compound adaptation source
function P4s/SX-TUG2_A_So .170
9.3.3.1 P4s layer to TUG2 adaptation source function
P4s/TUG2_A_So .172
9.3.3.2 TUG2 trail termination source function TUG2_T_So.173
9.3.3.3 TUG2 to VC-2 layer adaptation source function
TUG2/S2_A_So/L.0.174
9.3.3.4 TUG2 to VC-12 layer adaptation source function
TUG2/S12_A_So/L.M.177
9.3.3.5 TUG2 to VC-11 layer adaptation source function
TUG2/S11*_A_So/L.M.180
9.3.4 P4s layer to VC-2, VC-12, and VC-11 layer compound adaptation sink
function P4s/SX-TUG2_A_Sk .184
9.3.4.1 P4s layer to TUG2 adaptation sink function
P4s/TUG2_A_Sk .186
9.3.4.2 TUG2 trail termination sink function TUG2_T_Sk .188
9.3.4.3 TUG2 to VC-2 layer adaptation sink function
TUG2/S2_A_Sk/L.0 .189
9.3.4.4 TUG2 to VC-12 layer adaptation sink function
TUG2/S12_A_Sk/L.M .191
9.3.4.5 TUG2 to VC-11 layer adaptation sink function
TUG2/S11*_A_Sk/L.M.193
9.3.5 P4s layer to P0s layer adaptation source P4s/P0s_A_So.195
9.3.6 P4s layer to P0s layer adaptation sink P4s/P0s_A_Sk .196
9.3.7 P4s to V0x adaptation source P4s/V0x_A_So .197
9.3.8 P4s to V0x adaptation sink P4s/V0x_A_Sk.198
9.3.9 P4s to DCC adaptation source P4s/DCC_A_So.199
9.3.10 P4s to DCC adaptation sink P4s/DCC_A_Sk .200
9.3.11 P4s to SD adaptation source P4s/SD_A_So.201
9.3.12 P4s to SD adaptation sink P4s/SD_A_Sk .201
9.3.13 P4s to ATM VP compound adaptation source P4s/Avp_A_So .201
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ETS 300 417-5-1: March 1998
9.3.14 P4s to ATM VP compound adaptation sink P4s/Avp_A_Sk. 201
9.3.15 P4s Layer Clock adaptation source P4s-LC_A_So . 201
9.4 P4s layer monitoring functions . 202
9.4.1 P4s non-intrusive monitoring function P4sm_TT_Sk . 202
9.5 P4s layer trail protection functions . 204
9.6 P4s tandem connection sublayer functions. 205
9.6.1 P4s tandem connection trail termination source function (P4sD_TT_So). 205
9.6.2 P4s tandem connection trail termination sink function (P4sD_TT_Sk) . 208
9.6.3 P4s tandem connection to p4s adaptation source function
(P4sD/P4s_A_So). 213
9.6.4 P4s tandem connection to p4s adaptation sink function (P4sD/P4s_A_Sk)214
9.6.5 P4s tandem connection non-intrusive trail termination sink function
(P4sDm_TT_Sk). 215
10 P4x path layer functions . 219
11 P32x path layer functions . 219
12 P31x path layer functions . 219
13 P22x path layer functions . 219
14 P12x path layer functions . 219
15 P11x path layer functions . 219
16 P0s path layer functions . 220
17 P0-31c path layer functions . 220
Annex A (informative): Relationship between TU-2/12 address, and location of columns within a P4s
TUG3 structured payload. 221
Annex B (informative): Relationship between TU-2/12 address, and location of columns within a P4s
TUG2 structured payload. 224
Annex C (informative): Bibliography . 227
History. 228
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ETS 300 417-5-1: March 1998
Foreword
This European Telecommunication Standard (ETS) has been produced by the Transmission and
Multiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI)
in order to provide inter-vendor and inter-operator compatibility of Synchronous Digital Hierarchy (SDH)
equipments.
Transposition dates
Date of adoption of this ETS: 6 March 1998
Date of latest announcement of this ETS (doa): 30 June 1998
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1998
Date of withdrawal of any conflicting National Standard (dow): 31 December 1998
This ETS consists of 8 parts as follows:
Part 1: "Generic processes and performance" (ETS 300 417-1-1 [8]).
Part 2: "SDH and PDH Physical section layer functions" (ETS 300 417-2-1).
Part 3: "STM-N regenerator and multiplex section layer functions" (ETS 300 417-3-1).
Part 4: "SDH path layer functions" (ETS 300 417-4-1 [10]).
Part 5: "PDH path layer functions" (ETS 300 417-5-1).
Part 6: "Synchronization distribution layer functions" (ETS 300 417-6-1 [11]).
Part 7: "Auxiliary layer functions" (ETS 300 417-7-1).
Part 8: "Compound and major compound functions" (ETS 300 417-8-1).
Introduction
The atomic PDH path layer functions are defined below used in plesiochronous and synchronous
operation. They describe the functionality of PDH multiplex equipments described in the ITU-T
Recommendations G.751 [6] and G.742 [5] for signal hierarchies P4e, P31e and P22e. In addition they
describe the functionality of synchronous PDH equipment described in ETS 300 167 [2] for P12s layer
signals, and ETS 300 337 [9] for P31s and P4s signals.
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ETS 300 417-5-1: March 1998
1 Scope
This European Telecommunication Standard (ETS) specifies a library of basic building blocks and a set of
rules by which they are combined in order to describe a digital transmission equipment. The library
comprises the functional building blocks needed to completely specify the generic functional structure of
the European digital transmission hierarchy. Equipment which is compliant with this ETS can be described
as an interconnection of a subset of these functional blocks contained within this ETS. The
interconnections of these blocks should obey the combination rules given. The generic functionality is
described in the ETS 300 417-1-1 [8].
2 References
This ETS incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references subsequent amendments to, or revisions of, any of these publications
apply to this ETS only when incorporated in it by amendments or revisions. For undated references the
latest edition of the publication referred to applies.
[1] ETS 300 147: "Transmission and Multiplexing (TM); Synchronous Digital
Hierarchy (SDH); Multiplexing structure".
[2] ETS 300 167 (1993): "Transmission and Multiplexing (TM); Functional
characteristics of 2 048 kbit/s interfaces".
[3] ITU-T Recommendation G.703 (1991): "Physical/electrical characteristics of
hierarchical digital interfaces".
[4] ITU-T Recommendation G.704 (1995): "Synchronous frame structures used at
1 544, 6 312, 2 048, 8 488 and 44 736 kbit/s hierarchical levels".
[5] ITU-T Recommendation G.742 (1988): "Second order digital multiplex
equipment operating at 8 448 kbit/s and using positive justification".
[6] ITU-T Recommendation G.751 (1988): "Digital multiplex equipments operating
at the third order bit rate of 34 368 kbit/s and the fourth order bit rate of
139 264 kbit/s and using positive justification".
[7] ITU-T Recommendation G.823: "The control of jitter and wander within digital
networks which are based on the 2 048 kbit/s hierarchy".
[8] ETS 300 417-1-1 [8] (1996): "Transmission and Multiplexing (TM); Generic
functional requirements for Synchronous Digital Hierarchy (SDH) equipment;
Part 1-1: Generic processes and performance".
[9] ETS 300 337: "Transmission and Multiplexing (TM); Generic frame structures
for the transport of various signals (including Asynchronous Transfer Mode
(ATM) cells and Synchronous Digital Hierarchy (SDH) elements) at the ITU-
T Recommendation G.702 hierarchical rates of 2 048 kbit/s, 34 368 kbit/s and
139 264 kbit/s".
[10] ETS 300 417-4-1: "Transmission and Multiplexing (TM); Generic requirements
of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy
(SDH) path layer functions".
[11] ETS 300 417-6-1: "Transmission and Multiplexing (TM); Generic requirements
of transport functionality of equipment; Part 6-1: Synchronization layer
functions".
[12] EN 301 163: "Transmission and Multiplexing (TM); Generic requirements of
Asynchronous Transfer Mode (ATM) transport functionality within equipment".
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ETS 300 417-5-1: March 1998
[13] ETS 300 166 (1993): "Transmission and Multiplexing (TM); Physical and
electrical characteristics of hierarchical digital interfaces for equipment using the
2048 kbit/s - based plesiochronous or synchronous digital hierarchies".
3 Definitions, abbreviations and symbols
3.1 Definitions
The functional definitions are described in the ETS 300 417-1-1 [8].
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
A Adaptation function
AcSL Accepted Signal Label
AcTI Accepted Trace Identifier
AI Adapted Information
AIS Alarm Indication Signal
AP Access Point
APId Access Point Identifier
ATM Asynchronous Transfer Mode
Avp ATM VP layer
BIP Bit Interleaved Parity
BIP-N Bit Interleaved Parity, width N
BITS Building Integrated Timing Supply
C Connection function
CH CHannel
CI Characteristic Information
CK ClocK
CM Connection Matrix
CMI Coded Mark Inversion
Co Connection
CP Connection Point
CRC Cyclic Redundancy Check
CRC-N Cyclic Redundancy Check, width N
Cs supervisory-unequipped Connection function
CSES Consecutive Severely Errored Seconds
CTF Compound Timing Function
Ctrl Control
D Data
DCC Data Communications Channel
DEC DECrement
DEG DEGraded
DEGTHR DEGraded THReshold
DL Data Link
DPRING Dedicated Protection RING
DROP Decreased Received Optical Power
DXC Digital Cross Connect
E0 Electrical interface signal 64 kbit/s
E11 Electrical interface signal 1 544 kbit/s
E12 Electrical interface signal 2 048 kbit/s
E22 Electrical interface signal 8 448 kbit/s
E31 Electrical interface signal 34 368 kbit/s
E32 Electrical interface signal 44 736 kbit/s
E4 Electrical interface signal 139 264 kbit/s
EBC Errored Block Count
EDC Error Detection Code
EDCV Error Detection Code Violation
EFS Equipment Functional Specification
EMF Equipment Management Function
EQ EQuipment
Ex ITU-T Recommendation G.703 [3] type Electrical signal, bit rate order x
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ETS 300 417-5-1: March 1998
ExSL Expected Signal Label
ExTI Expected Trace Identifier
F_B Far-end Block
FAS Frame Alignment Signal
FASE Frame Alignment Signal Error
FO Frame Offset information
FOP Failure Of Protocol
FS Frame Start signal
HDB3 High Density Bipolar of order 3
HDLC High-level Data Link Control procedure
HO Higher Order
HOVC Higher Order Virtual Container
HP Higher order Path
ID IDentifier
IF In Frame state
INC INCrement
IOS Intra-Office Section
IS Intermediate System
ISDN Integrated Services Digital Network
ISO International Standardization Organization
LC Link Connection
LO Lower Order
LOF Loss Of Frame
LOM Loss Of Multiframe
LOP Loss Of Pointer
LOS Loss Of Signal
LOVC Lower Order Virtual Container
LPx Lower order Path for VC-x (x = 11, 12, 2, 3)
LT Line Termination
M&CF Management & Communication Function
MC Matrix Connection
MFP MultiFrame Present
MI Management Information
MON MONitored
MP Management Point
N.C. Not Connected
N_B Near-end Block
NC Network Connection
NCI No CRC-4 Multiframe Indication
NDF New Data Flag
NE Network Element
NMON Not MONitored
NNI Network Node Interface
NU National Use (bits, bytes)
OAM Operation, Administration and Management
OFS Out of Frame Second
OOF Out Of Frame state
OS Operations System
OS Optical Section
OSC OSCillator
OSI(x) Open Systems Interconnection, layer x
OW Order Wire
P Protection
P0_31c 1 984 kbit/s layer
P0s 64 kbit/s layer (transparent)
P11x 1 544 kbit/s layer (transparent)
P12s 2 048 kbit/s PDH path layer with synchronous 125 ms frame structure as
specified in ETS 300 167 [2]
P12x 2 048 kbit/s layer (transparent)
P22e 8 448 kbit/s PDH path layer with 4 plesiochronous 2 048 kbit/s
P22x 8 448 kbit/s layer (transparent)
P31e 34 368 kbit/s PDH path layer with 4 plesiochronous 8 448 kbit/s
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ETS 300 417-5-1: March 1998
P31s 34 368 kbit/s PDH path layer with synchronous 125 ms frame structure as
specified in ETS 300 337 [9]
P31x 34 368 kbit/s layer (transparent)
P32x 44 736 kbit/s layer (transparent)
P4e 139 264 kbit/s PDH path layer with 4 plesiochronous 34 368 kbit/s
P4s 139 264 kbit/s PDH path layer with synchronous 125 ms frame structure as
specified in ETS 300 337 [9]
P4x 139 264 kbit/s layer (transparent)
PDH Plesiochronous Digital Hierarchy
PEC PDH Equipment Clock
PJE Pointer Justification Event
PLM PayLoad Mismatch
PM Performance Monitoring
Pn Plesiochronous signal, Level n
POH Path OverHead
PRC Primary Reference Clock
PS Protection Switching
PSC Protection Switch Count
PTR PoinTeR
PU PDH Unit
QOS Quality Of Service
RDI Remote Defect Indicator
REI Remote Error Indicator
RI Remote Information
RLT Regenerated Line Termination
RNCI Remote No CRC-4 Multiframe Indication
RP Remote Point
RS Regenerator Section
RS1 STM-1 Regenerator Section
RS16 STM-16 Regenerator Section
RS4 STM-4 Regenerator Section
RSOH Regenerator Section OverHead
RxSL Received Signal Label
RxTI Received Trace identifier
SASE Stand-Alone Synchronization Equipment
SD synchronization distribution layer, Signal Degrade
SEC SDH Equipment Clock
SES Severely Errored Second
SESR Severely Errored seconds Ratio
SF Signal Fail
Sk Sink
SMF Sub-Multi-Frame
SNC Sub-Network Connection
SNC/I Inherently monitored Sub-Network Connection protection
SNC/N Non-intrusively monitored Sub-Network Connection protection
So Source
SOH Section OverHead
SPRING Shared Protection RING
SSD Server Signal Degrade
SSF Server Signal Fail
SSM Synchronization Status Message
SSU Synchronization Supply Unit
TCP Termination Connection Point
TD Transmit Degrade
TF Transmit Fail
TFAS trail Trace identifier Frame Alignment Signal
TG Timing Generator
TI Timing Information
TIM Trace Identifier Mismatch
TM Transmission_Medium
TP Timing Point
TPmode Termination Point mode
TR Threshold Report
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ETS 300 417-5-1: March 1998
TS Time Slot
TSD Trail Signal Degrade
TSF Trail Signal Fail
TSL Trail Signal Label
TT Trail Termination function
TTI Trail Trace Identifier
TTP Trail Termination Point
TTs Trail Termination supervisory function
TU Tributary Unit
TUG Tributary Unit Group
TUG-m Tributary Unit Group, level m
TU-m Tributary Unit, level m
TxSL Transmitted Signal Label
TxTI Transmitted Trace Identifier
UAS UnAvailable Second
UNEQ Unequipped
UNI User Network Interface
USR USeR channels
UVC Unequipped VC
VC Virtual Container
VC-n Virtual Container, level n
VMR Violation Monitoring and Removal
VP Virtual Path
W Working
3.3 Symbols and Diagrammatic Conventions
The symbols and diagrammatic conventions are described in the ETS 300 417-1-1 [8].
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ETS 300 417-5-1: March 1998
4 P4e path layer functions
P31s_CI P31e_CI P31e_CI P31s_C I
P31x_CI P31x_CI
P4e_PEC
#4 #4 #4
#4 #4 #4
#1 #1 #1
#1 #1 #1
P4e_TI
P4e/P31s P4e/P31e P4e/P31x P4e/P31x P4e/P31e P4e/P 31s
P4e P4e P4em
RI_RDI
P4e_CI P4e_CI P4e_C I
Figure 1: P4e path layer atomic functions
P4e layer CP
The Characteristic Information (CI) at this point is 139 264 kbit/s bit structured signal as specified in ITU-T
Recommendation G.751 [6] with co-directional bit timing and the frame start information FS. The CI is
structured to form a 2 928 bit long frame with 16 bit frame overhead containing 12 bit FAS, one bit RDI
and a three bit user CI.
NOTE 1: The bits for National Use (NU) in row 4, columns 2 to 4 of figure 2 are reserved for
operator specific usage. Their processing is not within the province of this ETS.
P4e layer AP
The AI at this point is a multiplexed signal containing four (728/2 928) · 139 264 kbit/s (see note 2)
tributary signals (PU31) and (3/2 928) · 139 264 kbit/s (see note 3) user CI (NU) with co-directional bit
timing and frame start information.
NOTE 2: This equations equals a bitrate of 34 625,748 633 879 8 kbit/s.
NOTE 3: This equations equals a bitrate of 142,688 524 590 164 kbit/s.
The signal transported by an PU31 will be determined by the client layer application. Typical signals
include:
- a 34 368 kbit/s signal P31x_CI without an assumed structure and justification overhead bits;
- a 34 368 kbit/s signal P31e_CI with a frame structure as specified in ITU-T
Recommendation G.751 [6] and justification overhead bits;
- a 34 368 kbit/s signal P31s_CI with a frame structure as specified in ETS 300 337 [9] and
justification overhead bits.
Figure 1 shows that more than one adaptation function exists in this P4e layer that can be connected to
one P4e access point. For the case of the adaptation source functions, only one of these adaptation
source functions is allowed to be activated. For this activated source, access to the access point by other
adaptation source functions shall be denied. In contradiction with the source direction, adaptation sink
functions may be activated all together. This may cause faults (e.g. cLOF) to be detected and reported. To
prevent this an adaptation sink function can be deactivated.
NOTE 4: If one adaptation function only is connected to the AP, it will be activated. If one or
more other functions are connected to the same AP, one out of the set of functions will
be active.
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ETS 300 417-5-1: March 1998
1 234
12 34
1 FAS FAS FAS FAS
2 FAS FAS FAS FAS
3 FAS FAS FAS FAS
4 RDI NU NU NU NU NU NU
P4e payload
PU31 PU31 PU31 PU31
(728 x 4 bit)
#1 #2 #3 #4
Figure 2: P4e_CI_D (left) and P4e_AI_D (right) signals
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ETS 300 417-5-1: March 1998
1 P31
2 P31
119 C
120 P31
121 P31
241 C
242 P31
243 P31
P31: 34 368 kbit/s data bit
C: justification control bit
J: justification opportunity bit
363 C
364 P31
365 P31
485 C
496 P31
497 P31
607 C
608 J
609 P31
610 P31
Figure 3: PU31 #i (i=1,2,3,4) of P4e_AI_D
4.1 P4e connection functions
For further study.
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ETS 300 417-5-1: March 1998
4.2 P4e trail termination functions
4.2.1 P4e trail termination source P4e_TT_So
Symbol:
P4e_AI
P4e
P4e_RI_RDI
P4e_CI
Figure 4: P4e_TT_So symbol
Interfaces:
Table 1: P4e_TT_So input and output signals
Input(s) Output(s)
P4e_AI_D P4e_CI_D
P4e_AI_CK P4e_CI_CK
P4e_AI_FS P4e_CI_FS
P4e_RI_RDI
Processes:
This function adds the RDI information bit (see figure 2) and the frame alignment signal into the frame
overhead. The frame overhead is defined as the first 16 bits of this frame as specified in ITU-T
Recommendation G.751 [6], subclause 1.5.2.
RDI: This bit represents the defect status of the associated P4e_TT_Sk. The RDI indication shall be set to
"1" on activation of P4e_RI_RDI within 900 ms, determined by the associated P4e_TT_Sk function, and
set to "0" within 900 ms on the P4e_RI_RDI removal.
Frame Alignment Signal (FAS):
The function shall insert the 139 264 kbit/s frame alignment signal
(111110100000) into the frame overhead.
Defects: none.
Consequent actions: none.
Defect correlations: none.
Performance monitoring:
none.
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ETS 300 417-5-1: March 1998
4.2.2 P4e trail termination sink P4e_TT_Sk
Symbol:
P4e_AI
P4e
P4e_TT_Sk_MI P4e_RI_RDI
P4e_CI
Figure 5: P4e_TT_Sk symbol
Interfaces:
Table 2: P4e_TT_Sk input and output signals
Input(s) Output(s)
P4e_CI_D P4e_AI_D
P4e_CI_CK P4e_AI_CK
P4e_CI_FS P4e_AI_FS
P4e_CI_SSF P4e_AI_TSF
P4e_TT_Sk_MI_TPmode P4e_RI_RDI
P4e_TT_Sk_MI_SSF_Reported P4e_TT_Sk_MI_cRDI
P4e_TT_Sk_MI_RDI_Reported P4e_TT_Sk_MI_cSSF
P4e_TT_Sk_MI_1second P4e_TT_Sk_MI_pN_DS
P4e_TT_Sk_MI_pN_EBC
P4e_TT_Sk_MI_pF_DS
Processes:
This function recovers the RDI information bit (see figure 2) of the frame overhead as specified in ITU-T
Recommendation G.751 [6], subclause 1.5.2.
FAS: The FAS bits of each received frame are compared to their expected value "111110100000". A
difference is taken as evidence of one or more errors (nN_B) in the block.
RDI:
The information carried in the RDI bit shall be extracted to enable single ended maintenance of a
bi-directional Trail (Path). The RDI (row 4, column 1) provides information as to the status of the remote
receiver. A "1" indicates an RDI state, while a "0" indicates the normal, working state. The application
process is described in ETS 300 417-1-1 [8], subclauses 7.4.11 and 8.2 (RDI).
Defects:
The function shall detect for dRDI defect according the specification in ETS 300 417-1-1 [8],
subclause 8.2.1.
Consequent actions:
‹aTSF CI_SSF;
‹aRDI CI_SSF.
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ETS 300 417-5-1: March 1998
Defect correlations:
cRDI‹dRDI and MON and RDI_Reported;
cSSF‹CI_SSF and MON and SSF_Reported.
Performance monitoring:
The performance monitoring process shall be performed as specified in ETS 300 417-1-1 [8],
subclauses 8.2.4 to 8.2.7.
NOTE: Whether or not performance monitoring is actually supported by a network element is
determined by the presence of the element management performance monitoring
functions.
pN_DS‹aTSF or dEQ;
pF_DS‹dRDI;
pN_EBC ‹S nN_B.
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ETS 300 417-5-1: March 1998
4.3 P4e adaptation functions
4.3.1 P4e to P31x adaptation source P4e/P31x_A_So/i
Symbol:
P31x_CI
i=1.4
P4e/P31x
P4e/P31x_A_So_M I P4e_TI
-i
P4e_AI
Figure 6: P4e/P31x_A_So symbol
Interfaces:
Table 3: P4e/P31x_A_So input and output signals
Input(s) Output(s)
P31x_CI_D P4e_AI_D
P31x_CI_CK P4e_AI_CK
P4e_TI_CK P4e_AI_FS
P4e_TI_FS
P4e/P31x_A_So_MI_Active
Processes:
This function maps one plesiochronous, 34 368 kbit/s, P31 information stream into the P4e frame (see
figure 2), as specified in ITU-T Recommendation G.751 [6], subclause 1.5.2. It takes P31x_CI, a bit-
stream with a rate of 34 368 kbit/s ± 20 ppm, present at its input and inserts it into the PU31 #i having a
capacity of 728 bits and the justification frame as depicted in figure 3. The function can be
activated/deactivated when multiple payload adaptation functions are connected to the access point.
Frequency justification and bitrate adaptation: The function shall provide for an elastic store (buffer)
process. The data signal shall be written into the buffer under control of the associated input clock. The
data signal shall be read out of the buffer under control of the P4e clock, frame position (P4e_TI), and
justification decisions.
The justification decisions determine the phase error introduced by the P4e/P31x_A_So function. The
amount of this phase error can be measured at the physical interfaces by monitoring the justification
control bits C (see figure 3). An example is given in ETS 300 417-4-1 [10], annex A.3.
Each justification decision results in a corresponding positive justification action. Upon a positive
justification action, the reading of 1 data bit shall be cancelled once and no data is written at the
justification opportunity bit J.
NOTE: A requirement for maximum introduced phase error generated by the justification
process is for further study.
Buffer size: This justification process shall not introduce any errors when the input clock (P31x_CI_CK)
has a frequency within the range 34 368 kbit/s – 20 ppm and a jitter specified by ITU-T Recommendation
G.823 [7], and the P4e clock (P4e_TI_CK) has a frequency and jitter within the range specified in
subclause 4.5. Any step in frequency of the input clock within this range shall not cause any errors.
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ETS 300 417-5-1: March 1998
C bits - Justification control generation: The function shall generate the justification control (CCCCC) bits
according the specification in ITU-T Recommendation G.751 [6]. It shall insert the justification control bits
in the appropriate C bit positions.
PU-31 timeslot: The adaptation source function has access to a specific PU-31 of the P4e access point.
The PU-31 is defined by the parameter i (i=1 to 4).
Activation: The function shall access the access point when it is activated (MI_Active is true). Otherwise, it
shall not access the access point.
Defects: none.
Consequent actions: none.
Defect correlations: none.
Performance monitoring: none.
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ETS 300 417-5-1: March 1998
4.3.2 P4e to P31x Adaptation Sink P4e/P31x_A_Sk/i
Symbol:
P31x_CI
i=1.4
P4e/P31x
P4e/P31x_A_Sk_M I
-i
P4e_AI
Figure 7: P4e/P31x_A_Sk symbol
Interfaces:
Table 4: P4e/P31x_A_Sk input and output signals
Input(s) Output(s)
P4e_AI_D P31x_CI_D
P4e_AI_CK P31x_CI_CK
P4e_AI_FS P31x_CI_SSF
P4e_AI_TSF
P4e/P31x_A_Sk_MI_Active
Processes:
This function recovers one plesiochronous, 34 368 kbit/s, information stream P31 (see figures 2 and 3)
from the P4e frame as specified in ITU-T Recommendation G.751 [6], subclause 1.5.2. The function can
be activated/deactivated when multiple payload adaptation functions are connected to the access point.
C bits - Justification control interpretation: The function shall perform justification control interpretation
according ITU-T Recommendation G.751 [6] to recover the 34 368 kbit/s signal (P31) from t
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