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To find the length of the communications attachment
cables, you should measure from the system unit cable
entry hole to one of the following:
• The external modem or autocall unit.
• The digital network channel service unit.
• 'The teleprocessing line connector.
• The protective device, where such a device is
required to interface with a switched teleprocessing
line.
All cables except work station cables enter the system
unit through its cable entry hole at the bottom of the
unit. All cables from units other than work stations and
communications features leave the units through their
cable exit holes at the bottom of the units.
Cable Installation Responsibility
It is your responsibility to install, test, and maintain the
cables between the system unit and any attached work
stations. (You must also install the work stations.) For
appropriate installation planning information, see the
IBM 5250 Information Display
System
Planning
and Site
Preparation Guide, GA21-9337.
Under normal circumstances, IBM personnel will install
the cables for all other machines. Normal circumstances
are those in which there is an easily accessible cable
route, including an easily accessible raised floor or cable
raceway.
You must supply cable length data to your IBM
representative at least 120 calendar days before the
scheduled arrival date for your system.
However, if you prefer, you can have the cables installed
by non-IBM personnel. When cables are to be installed
by non-IBM personnel, IBM will furnish, upon request, a
representative to show them which cable belongs to
each machine, a copy of the cable layout diagram,
and/or printed information applicable to the installation
of cables.
4-2
It is your responsibility to arrange common carrier
service (such as telephone lines) to the point at which
such service lines meet IBM cables. Common carrier
service should be installed before the scheduled system
arrival date.
Switched lines in the US must be connected to a device
that has been registered by the US Federal
Communications Commission (FCC).' It is your
responsibility to register the following devices:
• Integrated modems.
• External modems.
• External protective couplers.
If the modem is not registered (examples: Sales
Features 5501, 5502, and 5508), you must obtain and
install a registered protective coupler to which IBM and
the common carrier can connect their cables. For Sales
Features 5501 and 5508, obtain FCC-registered
CBS-type (or equivalent) couplers; for Sales Feature
5502, obtain an FCC-registered CDT -type coupler.
You should also provide the common carrier with the
following information for each FCC-registered device:
• The FCC registration number.
• The ringer equivalence number.
• The uniform services ordering code (USOC), which
specifies the type of jack that the common carrier
must provide at the end of his cable, and, if required,
the USOC codes for the type of handset (with
handset options) that the common carrier must
provide at the end of his cable.
• The identification of the line to which the device is to
be connected.
, Exception: If the device was connected to the common carrier
cable on your premises before 17 October 1977, it does not
have to be registered.
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