External channel cables
1 Before you start
This book does not contain procedures for
installing external I/O devices.
You must refer to the documentation that was
shipped with the equipment for installation
information. Install the equipment and connect the
interface cables to the devices using the
documentation that was shipped with the
equipment.
2 General Information
12 mm is the minimum bend radius for fiber optic
cables.
Install a protective plug in a fiber optic receptacle
when the fiber optic connector is removed.
Use IBM Fiber Optic Cleaning Kit, part 5453521, to
clean the cable connector before installing it into
the receptacle of the card.
Replace the plastic cover on each un-installed fiber
optic connector.
Observe the following caution notices when handling ESCON fiber optic channel cables.
3 Caution Information
The laser modules are certified in the U.S. to conform to the requirements of DHHS 21 CFR
Subchapter J for Class 1 laser products. Elsewhere, they are certified to be in compliance with
IEC 825 (first edition 1984) and CENELEC HD 482 S1 as a Class 1 laser product. The coulping
facility channel modules have also been tested and approved to comply with international Class 1
laser product certifications. Consult the label on each part for laser certification numbers and
approval information.
Class 1 laser products are not considered to be hazardous. Internally, the laser modules operating
on multimode fiber contain a Class 3b laser that is nominally a 5.0 milliwatt source operating in the
wavelength region of 780-850 nm. Internally, the laser modules operating on single-mode fiber
contain a class 3b laser that is nominally a 5.0 milliwatt source operating in the wavelength region
of 1270-1340 nanometers. All laser modules are designed so that there is never any human access
to laser radiation above a Class 1 level during normal operation, user maintenance, or prescribed
service conditions.
Chapter 6. Completing the Installation
6-31
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