ISO/IEC 14763-3:2006/Amd 1:2009

ISO/IEC 14763-3
Edition 1.0 2009-11
INTERNATIONAL
STANDARD

colour
inside
AMENDMENT 1
Information technology – Implementation and operation of customer premises
cabling –
Part 3: Testing of optical fibre cabling


ISO/IEC 14763-3:2006/A1:2009(E)

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ISO/IEC 14763-3
Edition 1.0 2009-11
INTERNATIONAL
STANDARD

colour
inside
AMENDMENT 1
Information technology – Implementation and operation of customer premises
cabling –
Part 3: Testing of optical fibre cabling


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
L
ICS 35.200 ISBN 2-8318-1068-4

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– 2 – 14763-3 Amend. 1 © ISO/IEC:2009(E)
FOREWORD
Amendment 1 to International Standard ISO/IEC 14763-3 was prepared by subcommittee 25:
Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
This International Standard has been approved by vote of the member bodies, and the voting
results may be obtained from the address given on the second title page.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

2 Normative references
Delete the following references:
IEC 60793-1-20, Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre
geometry
IEC/PAS 61300-3-43, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-43: Examination and measurements – Mode
Transfer Function Measurement for fibre optic sources
Add the following new references:
IEC 61280-1-4, Fibre optic communication subsystem test procedures – Part 1-4: General
communication subsystems – Light source encircled flux measurement method
IEC 61280-4-1, Fibre optic communication subsystem test procedures – Part 4-1: Cable plant
and links – Multimode fibre-optic cable plant attenuation measurement
IEC/PAS 62614, Fibre optics – Launch condition requirements for measuring multimode
attenuation
3.1 Definitions
Replace the existing term and definition 3.1.7 by the following:
3.1.7
field calibration cord
test cord used for referencing when using the three test cord reference test method
Delete the following terms and definitions:
3.1.5
coupled power ratio (CPR)
3.1.14
relative power distribution

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14763-3 Amend. 1 © ISO/IEC:2009(E) – 3 –
Add, after 3.1.19, the following new terms and definitions:
3.1.20
attenuation
reduction of optical power induced by transmission though a medium such as optical fibre;
this is sometimes called insertion loss, L, and is given in dB as L = 10 log (P /P ), where
10 in out
P and P are the power, typically measured in mW, into and out of the cabling
in out
3.1.21
encircled flux
EF
fraction of cumulative near-field power to the total output power as a function of radial
distance from the optical centre of the core
3.1.22
OTDR dead zone
distance in which an OTDR cannot detect an event following a reflective event

3.2 Abbreviations
Add, in the existing list, the following:
EF Encircled flux
Remove, from the existing list, the following:
CPR, MPD and RPD
5.4 Documentation
Replace the existing item d) by the following:
d) optical fibre cabling details (fibre core size/MFD; fibre type, e.g. A1a, A1b, A1a.2, B1.1,
B1.3)
6.1.3 Power meters
Add, after the first paragraph, the following new paragraphs and NOTE:
When the test set-up (LSPM) is used for a link or channel attenuation, the measurement
uncertainty shall not be greater than ±0,02 dB.
When the test set-up (LSPM) is used for a field check of the reference connectors by
measuring the attenuation, the measurement uncertainty should be <0,02 dB.
NOTE It is therefore recommended to use a power meter with a power resolution of at least 2 decimal places.

6.3.2 Reference connector requirements
Add, after Table 3, the following new paragraphs and NOTE:
When the test set-up (LSPM) is also used for a link or channel attenuation the measurement
uncertainty should be <0,2 dB.

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– 4 – 14763-3 Amend. 1 © ISO/IEC:2009(E)
When the test set-up (LSPM) is used for a field check of the reference connectors by
measuring the attenuation, the measurement uncertainty should be <0,02 dB.
NOTE It is therefore recommended to use a power meter with a power resolution of at least 2 decimal places.

6.3.3.6 OTDR launch cord
Replace the second paragraph by the following new text:
The launch cord shall be
• longer than the attenuation dead zone of the OTDR (see Annex C for further details),
• long enough for a reliable straight-line fit to be made to the backscatter trace following the
dead zone (C1 to C2 in Figure 11) so that reliable insertion loss measurements may be
carried out. For example, in multimode fibre installations the length of the launch cord
should be at least 75 m,
• terminated at one end with one or more connectors suitable for attachment to the OTDR,
• terminated at the other end with one or more reference connectors compatible with the
interface to the installed cabling.
6.3.3.7 OTDR tail cord
Replace the first paragraph by the following new text:
The tail cord shall be
• of a different length than the corresponding launch cord (but longer than the attenuation
dead zone of the OTDR, see Annex C or further details),
• long enough for a reliable straight-line fit to be made to the backscatter trace following the
dead zone (C3 to C4 in Figure 11), so that reliable insertion loss measurements may be
made). For example, in multimode installations the length of the tail cord should be at
least 75 m,
• terminated at one end with one or more reference connectors compatible with the interface
to the installed cabling.

6.3.4.6 OTDR launch cord
Replace the first paragraph by the following new text:
The launch cord shall be
• longer than the attenuation dead zone of the OTDR,
• long enough for a reliable straight-line fit to be made to the backscatter trace following the
dead zone (C1 to C2 in Figure 11), so that reliable insertion loss measurements may be
carried out. For example, in single-mode installations the length of the launch cord should
be at least 150 m,
• terminated at one end with one or more connectors suitable for attachment to the OTDR,
see Annex C for further details,
• terminated at the other end with one or more single-mode reference connectors
compatible with the interface to the installed cabling.

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14763-3 Amend. 1 © ISO/IEC:2009(E) – 5 –
6.3.4.7 OTDR tail cord
Replace the first paragraph by the following new text:
The tail cord shall be
• of a different length than the corresponding launch cord (but longer than the attenuation
dead zone of the OTDR, see Annex C for further details),
• long enough for a reliable straight-line fit to be made to the backscatter trace following the
dead zone (C3 to C4 in Figure 11), so that reliable insertion loss measurements may be
carried out. For example, in single-mode installations the length of the tail cord should be
at least 150 m,
• terminated at one end with one or more reference connectors compatible with the interface
to the installed cabling.

8.1.2 Reference planes
Replace the third paragraph by the following new text:
The test configuration reference planes of a channel are within the equipment cords next to,
but excluding, the connections of the equipment cords into the test cords (see Figure 8). The
test configuration reference planes of a permanent link are within the test cords next to, and
including, the test cord connections which mate to the termination points of the permanent link
under test (see Figure 8).
Replace the existing Figure 8 by the following new Figure 8:

Reference planes
(channel)
Test cord adaptor Test cord adaptor
TEST TEST
EQP EQP
Test cord Equipment cord Equipment cord Test cord
Reference planes
(permanent link)
TEST TEST
EQP EQP
Test cord Test cord

NOTE The dotted area contains cable and may contain splices and additional connections.
Figure 8 – Channel and permanent link test configuration
In the second bullet point after Figure 8 replace “this variable factor” by “these variations”.

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– 6 – 14763-3 Amend. 1 © ISO/IEC:2009(E)
9.1.1.2 Test method
Replace, in the first paragraph, ”3-jumper” by “three test cord reference”.
Replace, in the second paragraph, ”1-jumper” by “one test cord reference”.
Replace the fifth paragraph by the following new text:
The reference measurement, P , shall be recorded in watts or dBm.
0
Replace the ninth paragraph by the following new text:
The cabling under test shall be connected between the launch and tail cords and the test
measurement, P , shall be recorded in watts or dBm.
1
Figure 9 LSPM 3-jumper attenuation measurement of installed cabling
Replace the title of Figure 9 by the following:
Figure 9 – SSPM three test cord attenuation measurement of installed cabling
Figure 10 LSPM 1-jumper attenuation measurement of installed link
Replace the title of Figure 10 by the following:
Figure 10 – SSPM one test cord attenuation measurement of installed cabling

9.1.1.3 Test result
Replace the first paragraph by the following new text:
For a given wavelength and in a given direction, measured loss is calculated using P and P
0 1
as follows:
L = P − P (dB) (1)
0 1
where P and P are expressed in dBm.
1 0
Add, before the last paragraph, the following new paragraph:
For example, if the reference power level P is −20 dBm (0,01 mW) and the measured power
0
level P is −23 dBm (0,005 mW) then the loss is 3 dB.
1

9.1.1.5 Treatment of channel test results
Add, before the existing paragraph, the following new text:
The use of reference terminations on the test cords affects the calculation of limits of testing
for channel attenuation. The referencing procedure involves the interconnection of reference
terminations in accordance with Table 2. The measurement of the channel includes
connection of the test cords to non-reference terminations, which for ISO/IEC 11801
compliant connecting hardware, are specified in Table 4.
Using the default three test cord reference method specified in 9.1.1.2, the limit of testing for
channel attenuation is

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14763-3 Amend. 1 © ISO/IEC:2009(E) – 7 –
• for MMF: Limit = 0,4 dB + Σ (cable attenuation) + Σ (embedded connection attenuation);
• for SMF: Limit = 0,6 dB + Σ (cable attenuation) + Σ (embedded connection attenuation).
NOTE Where the performance of the interfaces to the cabling under test is not in accordance with ISO/IEC 11801,
information should be sought from the manufacturers of the interfaces to determine the relevant information for
Table 3 and Table 4. The general formula for the value = 2 × {(reference/embedded) − (reference/reference)}.
Examples of these calculations are shown in Annex G.
9.1.1.6 Treatment of permanent link test results
Replace the first and second paragraphs by the following new text:
The use of reference terminations on the test cords affects the calculation of limits of testing
for permanent link attenuation. The referencing procedure involves the interconnection of
reference terminations in accordance with Table 2. The measurement of the channel includes
connection of the test cords to non-reference terminations, which for ISO/IEC 11801
compliant connecting hardware, are specified in Table 3.
Using the default three test cord reference method specified in 9.1.1.2, the limit of testing for
permanent link attenuation is

• for MMF: Limit = 0,4 dB + Σ (cable attenuation) + Σ (embedded connection attenuation);

• for SMF: Limit = 0,6 dB + Σ (cable attenuation) + Σ (embedded connection attenuation).
NOTE 1 Where the performance of the interfaces to the cabling under test is not in accordance with
ISO/IEC 11801, information should be sought from the manufacturers of the interfaces to determine the relevant
information for Tables 3 and 4. The general formula for the value = 2 × {(reference/random) −
(reference/reference)}.
Using the alternative one test cord reference method specified in 9.1.12, the limit for testing
for permanent link attenuation is
• for MMF: Limit = 0,6 dB + Σ (cable attenuation) + Σ (embedded connection attenuation);
• for SMF: Limit = 1,0 dB + Σ (cable attenuation) + Σ (embedded connection attenuation).
NOTE 2 Where the performance of the interfaces to the cabling under test is not in accordance with
ISO/IEC 11801, then information should be sought from the manufacturers of the interfaces to determine the
relevant information for Table 4. The general formula for the value = 2 × (reference/embedded).
Examples of these calculations are shown in Annex G.
9.1.2.1 Test method
Replace the existing second paragraph before the bullet points as follows:
The OTDR/optical source shall be selected for the mode/wavelength as defined in Annex C
and the appropriate settings established:

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– 8 – 14763-3 Amend. 1 © ISO/IEC:2009(E)
Replace the existing Figure 11 by the new Figure 11:

Permanent Link
under test

LC
TC
OTDRR

L

dB

C1

C2


C5
C3
C4

A
C6


L1 L  (m)



Key
LC Launch cord
TC Tail cord
C1, C2, C3, C4 Cursors for linear regression definition
C5, C6 Cursors at attenuation location
A Attenuation/Insertion loss of permanent link
L Length of permanent link
Figure 11 – OTDR measurement of installed cabling (permanent link)

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14763-3 Amend. 1 © ISO/IEC:2009(E) – 9 –
Replace the existing Figure 12 by the new Figures 12a and 12b as follows:

Channel under test
LC EC EC
TC
OTDR

L
dB

C1
A
C2
L  (m)
L1

Key
LC Launch cord
TC Tail cord
EC Equipment cord
C1, C2 Cursors for 2-point channel insertion loss/attenuation measurement
A Attenuation/Insertion loss of channel plus equipment connectors
L Length of channel
Figure 12a – Alternative a

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– 10 – 14763-3 Amend. 1 © ISO/IEC:2009(E)
Channel under test
TC
EC EC
LC
OTDR
L
dB
C1
C2
C5
C3
C4
A
C6
L1
L  (m)

Key
LC Launch cord
TC Tail
...