MIL-DTL-83526C
3.5.5 Termini. Termini shall be sufficiently specified to insure interchangeability and intermateability.
Removable, environment resisting fiber optic termini shall be used with these connectors for
interconnecting fiber optic cables. The termini are not supplied with connectors acquired to this
specification. Termini, for use with the connectors specified herein, shall be in accordance with MIL-PRF-
3.5.6 Inserts. The connector design shall preclude fiber damage due to potential cable winding (see
3.8.1).
3.5.6.1 Number of termini, arrangement and spacing. The insert pattern, that is, the number of termini,
their arrangement and spacing shall be as specified (see 3.1). Every terminus position shall accept either
optical or dummy termini. Termini spacing shall permit adequate terminus marking identification and easy
terminus insertion and removal.
3.5.6.2 Terminus insertion and removal methods. Optical terminus insertion shall be accomplished by
inserting the terminus through the inserts of the connector mating halves and by locking it in place. The
individual termini shall be positively retained in the connector when installed with the terminus insertion
tool and shall be capable of being removed without damage to the terminus or connector insert when
using the terminus removal tool. Requirements for these tools shall be as specified (see 3.1).
3.6 Backshell accessories. Backshells shall conform to the requirements as specified (see 3.1). The
backshell shall provide cable strain relief. The backshell shall be free of any sharp edges or other
configurations that could cause damage to optical fibers extending through them.
3.7 Protective covers and storage receptacles. Connectors shall be provided with a protective cover or
storage receptacle. These protective devices shall maintain the connector free of moisture, prevent entry
of air or dust into the connector and comply with the applicable requirements as specified herein and in
the specification sheet. When not in place, the protective device shall be protected against the
environment so that dirt, dust, or moisture are not carried to the connector mating surfaces by the
protective cover.
3.8 Cable strength member terminations. The termination of the cable strength member shall be such
that applying the tensile force specified herein to the cable will not damage the optical fibers or degrade
optic performance within specified limits.
3.8.1 Cable strain relief. As specified, the cable strain relief shall grip the cable as it exits the
connector to prevent degradation of optical performance by:
a. Cable flexing or twisting at or near the termination.
b. Cable pull out by tensile forces.
3.8.2 Cable service loop. Connectors shall be of a design so as to provide room for a service loop in
the optical fibers of sufficient length to allow an individual connector terminus to be repaired at least one
time before it is necessary to reterminate the entire connector.
3.9 Tools. Tools used to terminate connectors onto cables shall be as specified (see 3.1). The
connector manufacturer shall provide the tools when specified in the acquisition documents (see 6.2).
3.10 Optical performance requirements. The optical performance requirements of 3.10.1 through
3.10.6 shall be used to monitor the effects of the inspection requirements specified in 3.11 as required by
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