Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Cable Specifications
M40 Internet Router Hardware Guide
182
Cable Specifications
See the following sections for specifications for the indicated type of cable. For information
about the cable used by the PICs supported on the M40 router, see the M20 and M40 Internet
Routers PIC Guide.
about the cable used by the PICs supported on the M40 router, see the M20 and M40 Internet
Routers PIC Guide.
Maintain PIC Cables
To maintain PIC cables, follow these guidelines:
Use the cable management system (shown in Figure 1) to support cables and prevent
cables from dislodging or developing stress points.
Place excess cable out of the way in the cable management system. Do not allow
fastened loops of cable to dangle from the connector because this stresses the cable at
the fastening point. Putting fasteners on the loops help to maintain their shape.
the fastening point. Putting fasteners on the loops help to maintain their shape.
Keep the cable connections clean and free of dust and other particles, which can cause
drops in the received power level. Always inspect cables and clean them if necessary
before connecting an interface.
before connecting an interface.
Label all PIC cables to identify them, labeling each end of the cable the same.
The following guidelines apply specifically to fiber-optic cable:
When you unplug a fiber-optic cable from a PIC, always place a rubber safety plug over
the transceiver on the PIC faceplate.
Keep fiber-optic cable connections clean using an appropriate fiber-cleaning device,
such as RIFOCS 945/946 Fiber Optic Connector Cleaning System. See “Fiber-Optic
Connector Cleaning” on page 213.
Connector Cleaning” on page 213.
Anchor fiber-optic cable to avoid stress on the connectors. When attaching fiber to a PIC,
be sure to secure the fiber so it is not supporting its own weight as it hangs to the floor.
Never let fiber-optic cable hang free from the connector.
Never let fiber-optic cable hang free from the connector.
Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few inches
can damage the cable and cause problems that are difficult to diagnose.
Frequent plugging and unplugging of fiber-optic cable into and out of optical
instruments, such as ATM or SONET/SDH analyzers, can cause damage to the
instruments that is expensive to repair. Instead, attach a short fiber extension to the
optical equipment. Any wear and tear due to frequent plugging and unplugging is then
absorbed by the short fiber extension, which is easy and inexpensive to replace.
instruments that is expensive to repair. Instead, attach a short fiber extension to the
optical equipment. Any wear and tear due to frequent plugging and unplugging is then
absorbed by the short fiber extension, which is easy and inexpensive to replace.