ii Rec. ITU-T G.652 (11/2016)
years; therefore the reader is warned to consider the appropriate
version to determine the characteristics of already deployed
product, taking into account the year of production. In fact,
products are expected to comply with the Recommendation that
was in force at the time of their manufacture, but may not fully
comply with subsequent versions of the Recommendation.
11.1002/1000/6261
Support of G.695 applications is noted.
A clarification of the method of fitting chromatic dispersion
coefficient values and their use is provided in 5.10, along with
some text on use of the statistics of chromatic dispersion for
system design.
A clarification of the relationship of the PMD
Q
of uncabled fibre
to cabled fibre is provided in 6.2.
In the tables of requirements:
The uncabled fibre PMD line item is removed from the tables and
the note on the requirement for uncabled fibre PMD is modified.
The tolerance of MFD at 1310 nm is reduced.
The maximum dispersion slope at the zero dispersion wavelength
is reduced.
The maximum concentricity error is reduced.
The maximum macrobending loss is reduced.
The wording for the water peak requirement in Tables 3 and 4 are
modified to reflect a reference to the specification over the range
vs the specification at 1310 nm.
11.1002/1000/8522
Add IEC-60794-2-11 as an informative reference in clause 2.2.
Editorial correction at start of clause 6.2 (PMD).
New note has been introduced in Table 1 – 4 allowing higher
maximum cabled attenuation (1.0 dB/km) for short indoor cables.
Modification in Tables 3 and 4 to the cabled attenuation at 1383
nm (max. 0.40 dB/km).
New text has been introduced in Tables 3 and 4 concerning
hydrogen ageing (note 3).
11.1002/1000/10389
Tables 1 and 3 of edition 8 have not been changed. These tables
are not included in this version of Recommendation ITU-T
G.652, but are in the 2009 edition.
The tables in this edition have been renumbered. Tables 1 and 2
of this edition 9 correspond respectively to Tables 2 and 4 of
edition 8.
New clause 5 “Conventions” has been added. Following clause
numbers have been renumbered.
Chromatic dispersion specification for G.652.D fibres has been
changed into boundary line specification.
In clause 6.10 the text concerning chromatic dispersion for
G.652.D fibres has been modified.
In clause 7.2 (PMD) a note has been added about usability of high
PMD fibre and cable for systems with less stringent PMD
requirements.
In clause 8 only Table 1 (G.652.B) and Table 2 (G.652.D) are
indicated. Here also a reference to IEC fibre designations is
mentioned.
In Table 1 (G.652.B) and Table 2 (G.652.D) Note 1 has been
extended with text concerning attenuation coefficient at a
wavelength longer than 1625 nm.
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