User's Manual Part 6

C-7
3.14 location with restricted access:
A location where access to the protective
housing is restricted and not open to the public. Examples include industrial and
commercial premises, PBX rooms, computer system rooms, and optical test sets.
Distributed fiber networks may pass through unrestricted public areas, restricted
areas within premises, as well as controlled areas or they may be deployed entirely
within restricted business premises.
3.18 optical fiber communication system:
An engineered assembly for the
generation, transference, and reception of optical radiation arising from lasers in
which the transference is by means of optical fiber for communication purposes.
3.19 reasonable foreseeable event:
An event, the occurrence of which under given
circumstances can be predicted fairly accurately, and the occurrence of which is a
possibility. Examples of reasonably foreseeable events might include the following:
fiber cable break, optical connector disconnection, operator error or inattention to
safe working practices. Reckless use or use for completely inappropriate purposes
is not to be considered as a reasonably foreseeable event.
Installation Notes
The LGCell is covered under these parts of section 5 of 60825
5.2.1.3 Test Equipment:
During installation or testing of an optical fiber cable or
system, only test equipment of laser Class 1 should be used.
5.2.1.5 Installation Rules:
Each person engaged in the installation or service of an
optical fiber cable communication system should observe all rules, procedures and
practices established for the safe operation of optical fiber communication systems.
Evaluation of LGC System
The LGCell is covered under Annex A of 60825
The LG
Cell
system is a self contained product that contains an optical fiber
communication system that would be safe under normal operating conditions
because the optical radiation is totally enclosed and contained under intended
operation. However, because of the extended nature of the system, the optical
power may be accessible a kilometer from the optical source. The LG
Cell
system
contains LED's, which are the source of radiation covered under IEC 825. Usually
a whole fiber optical communication system would not be classified under IEC 825-
2 in the same way required under IEC 825-1. This is because, under intended
operation, the optical power is totally enclosed, and it could be argued that an
interpretation of IEC 825-1 would give a class 1 to all systems, which may not
accurately reflect the hazard potential of some systems. If the emitter can be
operated separately, it should be classified according to IEC 825-1. However, the
power output level of the LG
Cell
system is so low that it always falls into the class
1 hazard level even under 100% modulation conditions. The absolute maximum
allowed at 1300nm is +9.5 dBm. The absolute maximum accessible output of the