ETSI ETS 300 461-1 ed.1 (1996-10)

SLOVENSKI STANDARD
01-december-2003
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Transmission and Multiplexing (TM); Flexible Multiplexer (FM) equipment; Part 1: Core
functions, 2 048 kbit/s aggregate interface functions, tributary interface functions and
special functions
Ta slovenski standard je istoveten z: ETS 300 461-1 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 300 461-1
TELECOMMUNICATION October 1996
STANDARD
Source: ETSI TC-TM Reference: DE/TM-01013-1
ICS: 33.040.20
Key words: Interface, transmission, MUX
Transmission and Multiplexing (TM);
Flexible Multiplexer (FM) equipment;
Part 1: Core functions, 2 048 kbit/s aggregate interface
functions, tributary interface functions and special 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
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
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 1996. All rights reserved.

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ETS 300 461-1: October 1996
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 300 461-1: October 1996
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions.13
4 Abbreviations.14
5 Network reference configuration .15
6 Reference model and reference points.15
7 Core functions .18
7.1 Cross connection functions.18
7.2 Multiplexer Timing Source (MTS) .19
7.3 Control functions.19
7.4 Timing interfaces at 2 048 kHz .20
7.5 Power supply interface.20
7.6 Configurable parameters .20
7.7 Test functions .20
8 Aggregate interfaces .20
8.1 Reference point G.20
8.2 2 048 kbit/s CCITT Recommendation G.703 aggregate interface .21
8.2.1 Physical Interface function .21
8.2.1.1 Physical interface.21
8.2.1.2 Signal processing .21
8.2.1.3 Performance.21
8.2.1.4 Control signals.21
8.2.1.5 Signal at reference point B (or G).21
8.2.1.6 Mapping rules .21
8.2.1.7 Configurable parameters.22
8.2.1.8 Test functions .22
8.2.2 Lower order Section Protection Switch function.22
8.2.2.1 Signal at reference point B .23
8.2.2.2 Signal processing .23
8.2.2.3 Performance.23
8.2.2.4 Control signals.23
8.2.2.5 Signal at reference point G.23
8.2.2.6 Mapping rules .23
8.2.2.7 Configurable parameters.23
8.2.2.8 Test functions .23
8.3 Plesiochronous lower order path termination function.23
8.3.1 Signal at reference point G.23
8.3.2 Signal processing .24
8.3.3 Performance.24
8.3.4 Control signals.24
8.3.5 Signal at reference point H (or J) .24
8.3.6 Mapping rules.24
8.3.7 Configurable parameters.24
8.3.8 Test functions.25
8.4 Lower order path protection switch function .25
8.4.1 Signal at reference point H.25
8.4.2 Signal processing .25

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ETS 300 461-1: October 1996
8.4.2.1 1+1 protection . 25
8.4.2.2 1 for n protection . 25
8.4.3 Performance . 26
8.4.4 Control signals . 26
8.4.5 Signal at reference point J. 26
8.4.6 Mapping rules . 26
8.4.7 Configurable parameters . 26
8.4.8 Test functions . 26
9 Tributary interfaces. 27
9.1 Analogue, 64 kbit/s coding interfaces . 27
9.1.1 2-wire/4-wire voice band (3 400 Hz) interface . 27
9.1.1.1 Physical interface. 27
9.1.1.2 Coding. 27
9.1.1.3 Performance . 27
9.1.1.4 Signalling. 28
9.1.1.5 Signal at reference point M . 28
9.1.1.6 Cross connection rules . 28
9.1.1.7 Configurable parameters . 28
9.1.1.8 Test functions. 29
9.1.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling interface . 29
9.1.2.1 Physical interface. 29
9.1.2.2 Coding. 29
9.1.2.3 Performance . 29
9.1.2.4 Signalling. 29
9.1.2.5 Signal at reference point M . 30
9.1.2.6 Cross connection rules . 30
9.1.2.7 Configurable parameters . 30
9.1.2.8 Test functions. 30
9.1.3 PSTN interface . 31
9.1.4 Wide band (7 kHz) interface. 31
9.1.4.1 Physical interface. 31
9.1.4.2 Coding. 31
9.1.4.3 Performance . 31
9.1.4.4 Signalling. 31
9.1.4.5 Signal at reference point M . 31
9.1.4.6 Cross connection rules . 31
9.1.4.7 Configurable parameters . 31
9.1.4.8 Test functions. 32
9.2 Synchronous data interfaces. 32
9.2.1 CCITT Recommendation G.703, 64 kbit/s codirectional interface . 32
9.2.1.1 Physical interface. 32
9.2.1.2 Signal processing. 32
9.2.1.3 Performance . 32
9.2.1.4 Control signals . 32
9.2.1.5 Signal at reference point M . 33
9.2.1.6 Cross connection rules . 33
9.2.1.7 Configurable parameters . 33
9.2.1.8 Test functions. 33
9.2.2 CCITT Recommendation X.24 interface . 33
9.2.2.1 Physical interface. 33
9.2.2.2 Signal processing. 34
9.2.2.3 Performance . 34
9.2.2.4 Control signals . 34
9.2.2.5 Signal at reference point M . 34
9.2.2.6 Cross connection rules . 34
9.2.2.7 Configurable parameters . 35
9.2.2.8 Test functions. 35
9.2.3 CCITT Recommendation V.24 (V.10 and V.11) interface . 35
9.2.3.1 Physical interface. 36
9.2.3.2 Signal processing. 36
9.2.3.3 Performance . 36
9.2.3.4 Control signals . 37

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ETS 300 461-1: October 1996
9.2.3.5 Signal at reference point M.37
9.2.3.6 Cross connection rules .37
9.2.3.7 Configurable parameters.37
9.2.3.8 Test functions .37
9.2.4 Integrated base band transmission system for data interfaces.38
9.2.4.1 Physical interface.38
9.2.4.2 Signal processing .38
9.2.4.3 Performance.38
9.2.4.4 Control signals.38
9.2.4.5 Signal at reference point M.38
9.2.4.6 Cross connection rules .38
9.2.4.7 Configurable parameters.39
9.2.4.8 Test functions .39
9.3 CCITT Recommendation G.704 formatted n x 64 kbit/s signal interface .39
9.3.1 Physical interface .39
9.3.2 Signal processing .39
9.3.3 Performance.40
9.3.4 Control signals.40
9.3.5 Signal at reference point M .40
9.3.6 Cross connection rules.40
9.3.7 Configurable parameters.40
9.3.8 Test functions.40
9.4 ISDN tributary interfaces.41
9.5 CCITT Recommendation G.703, 2 048 kbit/s unstructured interface.41
9.5.1 Physical interface .41
9.5.2 Signal processing .42
9.5.3 Performance.42
9.5.4 Control signals.42
9.5.5 Signal at reference point G.42
9.5.6 Cross connection rule.42
9.5.7 Configurable parameters.42
9.5.8 Test functions.42
10 Defect or failure conditions and consequent actions.42
10.1 Defect or failure conditions in the core functions and consequent actions at reference
points J1 and M2.42
10.1.1 Defect or failure conditions in the core functions .42
10.1.1.1 Power supply failure .42
10.1.1.2 Loss of synchronization references .43
10.1.2 Consequent actions at reference points J1 and M2.43
10.2 Defects or failures at reference points A2 of the 2 048 kbit/s CCITT Recommendation
G.703 aggregate Physical Interface and consequent actions at reference points A1
and B2 (or G2) .44
10.2.1 Defect or failure conditions at reference points A2 of the 2 048 kbit/s
CCITT Recommendation G.703 aggregate Physical Interface.44
10.2.1.1 Loss Of incoming aggregate Signal (LOS).44
10.2.1.2 Bipolar violation error.45
10.2.2 Consequent actions at reference points A1 and B2 (or G2) .46
10.3 Defects or failures at reference points G2 and consequent actions at reference
points G1 and H2 (or J2) .46
10.3.1 Defect or failure conditions at reference points G2.46
10.3.1.1 Loss of frame alignment .46
10.3.1.2 Excessive bit error ratio .46
10.3.1.3 Defect indications from a remote equipment in TS 0 .47
10.3.1.4 Reception of alarm indication signal.47
10.3.1.5 Loss of multiframe alignment .47
10.3.1.6 Defect indication from a remote equipment in TS 16 .47
10.3.1.7 Reception of alarm indication signal in TS 16 .47
10.3.1.8 Frame slip.48
10.3.1.9 CRC4 block error.48
10.3.1.10 Remote CRC4 block error .48
10.3.2 Consequent actions at reference points G1 and H2 (or J2).48

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ETS 300 461-1: October 1996
10.4 Defects or failures at reference points P1 and consequent actions at reference
points P2 and M1 . 50
10.4.1 Defects or failure conditions at reference points P1. 50
10.4.1.1 2-wire/4-wire voice band (3 400 Hz) interface. 50
10.4.1.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling
interface . 50
10.4.1.3 PSTN interface. 50
10.4.1.4 Wide band interface (7 kHz) . 50
10.4.1.5 CCITT Recommendation G.703, 64 kbit/s codirectional
interface . 50
10.4.1.6 CCITT Recommendation X.24 interface. 50
10.4.1.7 CCITT Recommendation V.24 (V.10 and V.11) interface. 51
10.4.1.8 Integrated baseband transmission system for data
interfaces . 51
10.4.1.9 CCITT Recommendation G.704 formatted n x 64 kbit/s
signal interface. 51
10.4.1.10 ISDN interfaces. 51
10.4.1.11 CCITT Recommendation G.703, 2 048 kbit/s
unstructured interface . 51
10.4.2 Consequent actions at reference points P2 and M1. 52
10.4.2.1 2-wire/4-wire voice band (3 400 Hz) interface. 52
10.4.2.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling
interface . 52
10.4.2.3 PSTN interface. 52
10.4.2.4 Wide band interface (7 kHz) . 52
10.4.2.5 CCITT Recommendation G.703, 64 kbit/s codirectional
interface . 52
10.4.2.6 CCITT Recommendation X.24 interface. 53
10.4.2.7 CCITT Recommendation V.24 (V.10 and V.11) interface. 53
10.4.2.8 Integrated baseband transmission system for data
interfaces . 53
10.4.2.9 CCITT Recommendation G.704 formatted n x 64 kbit/s
signal interface. 53
10.4.2.10 ISDN interfaces. 55
10.4.2.11 CCITT Recommendation G.703, 2 048 kbit/s
unstructured interface . 55
11 Performance monitoring . 55
12 Test functions . 55
Annex A (normative): Differentiating between user information and network failure indication. 56
A.1 Signal processing (subclause 9.2.2.2). 56
A.2 Configurable parameters (subclause 9.2.2.7) . 56
A.3 CCITT Recommendation X.24 interface (subclause 10.4.1.6). 56
A.4 Signal processing (subclause 9.2.3.2). 56
A.5 Configurable parameters (subclause 9.2.3.7) . 57
A.6 CCITT Recommendation V.24 (V.10 and V.11) interface (subclause 10.4.1.7). 57
A.7 CCITT Recommendation X.24 interface (subclause 10.4.2.6). 57
A.8 CCITT Recommendation V.24 (V.10 and V.11) interface (subclause 10.4.2.7). 58
Annex B (normative): Analogue tributary interfaces, 32 kbit/s coding . 59
B.1 2-wire/4-wire voice band (3 400 Hz) interface . 59
B.1.1 Physical interface . 59

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ETS 300 461-1: October 1996
B.1.2 Coding.59
B.1.3 Performance .59
B.1.4 Signalling .59
B.1.5 Signal at reference point M.59
B.1.6 Cross connection rules .59
B.1.7 Configurable parameters .60
B.1.8 Test functions .60
B.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling interface.60
B.2.1 Physical interface.60
B.2.2 Coding.60
B.2.3 Performance .60
B.2.4 Signalling .61
B.2.5 Signal at reference point M.61
B.2.6 Cross connection rules .61
B.2.7 Configurable parameters .62
B.2.8 Test functions .62
B.3 Defects or failure conditions at reference points P1 or P2.62
B.3.1 2-wire/4-wire voice band (3 400 Hz) interface .62
B.3.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling interface .62
B.4 Consequent actions at reference points P2 and M1 .63
B.4.1 2-wire/4-wire voice band (3 400 Hz) interface .63
B.4.2 2-wire/4-wire voice band (3 400 Hz) with d.c. signalling interface .63
Annex C (informative): The position and use of loopbacks for testing data channels .64
C.1 The use of loopbacks.64
C.2 Local loopbacks.64
C.2.1 Local loopbacks CCITT Recommendation X.150.64
C.2.1.1 Loopback 1.64
C.2.1.2 Loopback 3c.64
C.2.1.3 Loopback 3b.65
C.2.2 Local loopbacks CCITT Recommendation V.54.65
C.2.2.1 Loopback 1.65
C.2.2.2 Loopback 3.65
C.3 Remote loopbacks .66
C.3.1 Remote loopbacks CCITT Recommendation X.150 .66
C.3.1.1 Loopback 4b.66
C.3.1.2 Loopback 2b.66
C.3.2 Remote loopbacks CCITT Recommendation V.54 .67
C.3.2.1 Loopback 4.67
C.3.2.2 Loopback 2.67
Annex D (informative): Special functions .68
D.1 Analogue multipoint conference bridge.68
D.1.1 General .68
D.1.2 Code conversion.69
D.1.2.1 64 kbit/s PCM.69
D.1.2.2 32 kbit/s ADPCM.69
D.1.2.3 64 kbit/s SB-ADPCM.69
D.1.3 Summing of uniform PCM signals .70
D.1.3.1 Summing .70
D.1.3.2 Overload.70
D.1.3.3 Offset control.70
D.1.3.4 AIS signal elimination .70
D.1.3.5 Delay .70
D.1.3.6 Configuration .70
D.1.4 Signalling .71

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ETS 300 461-1: October 1996
D.1.5 Network aspects. 71
D.2 Data multipoint bridge. 71
D.2.1 General. 71
D.2.2 Multipoint data bridge not using end to end control signals . 71
D.2.2.1 Master to slaves. 72
D.2.2.2 Slaves to master. 72
D.2.2.3 Delay. 72
D.2.2.4 Configuration . 72
D.2.3 Multipoint data bridge using end-to-end control signals. 72
D.2.3.1 Master to slaves. 73
D.2.3.2 Slaves to master. 73
D.2.3.3 Delay. 73
D.2.3.4 Configuration . 74
D.3 Broadcasting. 74
Annex E (informative): Possible methods for transferring control signals at reference point M. 75
E.1 Channel associated signalling in TS 16. 75
E.2 In-band procedure . 75
E.3 Other methods. 75
Annex F (informative): Test functions . 76
F.1 Internal self tests. 76
F.2 Tributary tests and transmission testing . 76
Annex G (informative): Bibliography . 77
History. 78

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ETS 300 461-1: October 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Transmission and
Multiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This European Telecommunication Standard (ETS) has been produced in order to meet the requirements
of network operators and equipment manufacturers for the deployment and design of Flexible Multiplexers
to be used in leased line and public network applications.
This ETS consists of 2 parts as follows:
Part 1: "Core functions, 2 048 kbit/s aggregate interface functions, tributary interface
functions and special functions".
Part 2: "Management and control functions" (ETS 300 461-2).
Transposition dates
Date of adoption of this ETS: 4 October 1996
Date of latest announcement of this ETS (doa): 31 January 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 July 1997
Date of withdrawal of any conflicting National Standard (dow): 31 July 1997

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ETS 300 461-1: October 1996
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ETS 300 461-1: October 1996
1 Scope
This European Telecommunication Standard (ETS) gives the characteristics of a Flexible Multiplexer (FM)
equipment; the related functions able to handle a variety of services with transparency for the service
provider, allowing enhanced management capabilities to be used in the access network. The services
considered in this ETS are related to digital leased line networks and transparent transfer of 2 048 kbit/s
signals in applications such as Integrated Services Digital Network (ISDN) primary rate and access or
2 048 kbit/s ONP leased line. ISDN basic access and Public Switched Telephone Network (PSTN) may be
subject to further consideration according to V5 interface standards. Tributaries of this multiplexer provide
interfaces related to the services to which it is connected. Internal mapping functions are based on
64 kbit/s and n x 64 kbit/s signals. The handling of sub 64 kbit/s signals is not precluded and is considered
as an option to the equipment. Also covered are the characteristics of 2 048 kbit/s aggregate frames
based on CCITT Recommendation G.704 [4] and on ETS 300 167 [32] with optional path protection and
2 048 kbit/s aggregate termination based on CCITT Recommendation G.703 [3] and on ETS 300 166 [31]
with optional section protection. Each aggregate frame based on CCITT Recommendation G.704 [4] and
on ETS 300 167 [32] may contain multiple services.
The requirements contained in this ETS are only for the purpose of describing the functions of the
multiplexer and are not intended to represent actual implementations.
2 Normative references
This ETS incorporates by dated and 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 amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] CCITT Recommendation G.172 (1988): "Transmission plan aspects of
international conference calls".
[2] CCITT Recommendation G.181 (1988): "Characteristics of 1+1 type restoration
systems for use on digital transmission links".
[3] CCITT Recommendation G.703 (1991): "Physical/electrical characteristics of
hierarchical digital interfaces".
[4] CCITT Recommendation G.704 (1991): "Synchronous frame structures used at
primary and secondary hierarchical levels".
[5] CCITT Recommendation G.706 (1991): "Frame alignment and cyclic
redundancy check (CRC) procedures relating to basic frame structures defined
in Recommendation G.704".
[6] CCITT Recommendation G.711 (1988): "Pulse code modulation (PCM) of voice
frequencies".
[7] CCITT Recommendation G.712 (1991): "Transmission performance
characteristics of pulse code modulation channels".
[8] CCITT Recommendation G.726 (1990): "40, 32, 24, 16 kbit/s adaptive
differential pulse code modulation (ADPCM)".
[9] CCITT Recommendation G.722 (1988): "7 kbit/s audio-coding within 64 kbit/s".
[10] CCITT Recommendation G.725 (1988): "System aspects for the use of 7 kHz
audio codec within 64 kbit/s".
[11] CCITT Recommendation G.732 (1988): "Characteristics of a primary PCM
multiplexer equipment operating at 2 048 kbit/s".

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ETS 300 461-1: October 1996
[12] CCITT Recommendation G.736 (1988): "Characteristics of a synchronous digital
multiplex equipment operating at 2 048 kbit/s".
[13] CCITT Recommendation G.761 (1988): "General characteristics of a
60-channel transcoder equipment".
[14] CCITT Recommendation G.811 (1988): "Timing requirements at the outputs of
primary reference clocks suitable for plesiochronous operation of international
digital links".
[15] CCITT Recommendation G.823 (1988): "The control of jitter and wander within
digital networks which are based on the 2 048 kbit/s hierarchy".
[16] CCITT Recommendation H.221 (1988): "Frame structure for a 64 kbit/s channel
in audio-visual teleservices".
[17] CCITT Recommendation M.3010 (1988): "Principles for a telecommunication
management network".
[18] CCITT Recommendation V.10 (1988): "Electrical characteristics for unbalanced
double-current interchange circuits operating at data signalling rates nominally
up to 100 kbit/s".
[19] CCITT Recommendation V.11 (1988): "Electrical characteristics for balanced
double-current interchange circuits operating at data signalling rates up to
10 Mbit/s".
[20] CCITT Recommendation V.13 (1988): "Simulated carrier control".
[21] CCITT Recommendation V.24 (1988): "List of definitions for interchange circuits
between data terminal equipment (DTE) and data circuit-terminating equipment
(DCE)".
[22] CCITT Recommendation V.35 (1984): "Data transmission at 48 kilobits per
second using 60-108 kHz group band circuits".
[23] CCITT Recommendation V.35 (1988): "Data transmission at 48 kilobits per
second using 60-108 kHz group band circuits".
[24] CCITT Recommendation V.38 (1993): "A 48/56/64 kbit/s data circuit-terminating
equipment standardized for use on digital point-to-point leased circuits".
[25] CCITT Recommendation V.54 (1988): "Loop test devices for modems".
[26] CCITT Recommendation X.150 (1988): "Principles of maintenance testing for
public data networks using data terminal equipment (DTE) and data
circuit-terminating equipment (DCE) test loops".
[27] CCITT Recommendation X.21 (1988): "Interface between data terminal
equipment (DTE) and data circuit-terminating equipment (DCE) for synchronous
operation on public data networks".
[28] CCITT Recommendation X.24 (1988): "List of definitions for interchange circuits
between data terminal equipment (DTE) and data circuit-terminating equipment
(DCE) on public data networks".
[29] CCITT Recommendation X.27 (1988): "Electrical characteristics for balanced
double-current interchange circuits for general use with integrated circuit
equipment in the field of data communications".
[30] ETS 300 132 (1994): "Equipment Engineering (EE); Power supply interface at
the input to telecommunications equipment".

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ETS 300 461-1: October 1996
[31] ETS 300 166 (1993): "Transmission and Multiplexing (TM); Physical and
electrical characteristics of hierarchical digital interfaces for equipment using the
2 048 kbit/s - based plesiochronous or synchronous digital hierarchies".
[32] ETS 300 167 (1993): "Transmission and Multiplexing (TM); Functional
characteristics of 2 048 kbit/s interfaces".
[33] ETR 135 (1994): "Transmission and Multiplexing (TM); Network aspects and
applications for a 4 (and n x 4) kbit/s data link in a 2 048 kbit/s frame".
[34] ISO 4903 (1980): "Information Technology - Data communication - 15-pole
DTE/DCE interface connector and contact number assignments".
[35] ETS 300 461-2 (1996): "Transmission and Multiplexing (TM); Flexible
Multiplexer (FM) equipment; Part 2: Management and control functions".
3 Definitions
For the purposes of this ETS, the following definitions apply.
aggregate interface: The aggregate interface supports signal transmitted over a common multiplex
channel.
blocking factor: The existence of connections in a mapping function can block the establishment of any
new connections. The blocking factor is the probability that a new connection cannot be made, expressed
as a decimal fraction of 1.
channel associated signalling cross connection capacity: This consists in the maximum number of
equivalent channels at 4 x 500 bit/s supported by the TS 16 Channel Associated Signalling (CAS)
multiframe which can be cross connected within the equipment.
cross connection capacity: This consists in the maximum number of equivalent channels at 64 kbit/s
which can be cross connected within the equipment.
NOTE: Cross connection of Time Slot 0 (TS 0) (or bits 1 to 8 of 2 048 kbit/s CCITT
Recommendation G.704 [4] frame) or TS 16 information according to CCITT
Recommendation G.704 [4] should be considered as equivalent to a 64 kbit/s channel.
Flexible Multiplexer (FM): A dev
...