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Chapter 1
Shelf and Backplane Hardware
increases appropriately. At initial turn-up, the default fan speed is high until the node initializes. If both
TSC cards fail, the fans automatically shift to high speed. If a single TSC card fails, the active TSC card
will still control the fan speed.
Table 1-2
Condition
Min at 48 V (ambient temperature less than 25 degrees C)
Max at 48 V (ambient temperature greater than 25 degrees C)
1.11 Cards and Slots
When a card is inserted in a card slot, it will contact the shelf backplane but is not fully installed until
the ejectors are fully closed.
1.11.1 Card Slot Requirements
The ONS 15600 shelf has 14 card slots numbered sequentially from left to right. Slots 1 to 4 and 11 to 14
are reserved for optical (OC-N) traffic cards. These slots can host any of the ONS 15600 optical cards.
Slots 6/7 and 8/9 are dedicated to SSXC cards, and Slots 5 and 10 house the TSC cards. Each card is
keyed to fit only in an appropriate slot for that card. Unused card slots should be occupied by a filler
card (blank faceplate).
Caution
Do not operate the ONS 15600 with a single TSC card or a single SSXC card installed. Always operate
the shelf with one active and one redundant standby TSC card and two SSXC cards.
Shelf assembly slots have symbols indicating the type of cards that you can install in them. Each
ONS 15600 card has a corresponding symbol. The symbol on the card must match the symbol on the slot.
Table 1-3
Table 1-3
Symbol Color/Shape
Orange/Circle
Purple/Square
Green/Cross
Refer to
All physical connections to the optical cards are made through OGI connectors on the card faceplate.
1.11.2 ASAP Card Cables
To allow enough clearance between ASAP card cables and the front door on ONS 15600 shelf assembly,
you must install LC connectors with a connector boot angled downward at 45 or 50 degrees.
Table 1-2
Power Requirements for an Individual Fan
shows the slot and card symbol definitions.
Slot and Card Symbols
Definition
Any optical card (OC-48 and OC-192)
TSC slot; only install ONS 15600 cards with a square symbol on the faceplate
SSXC slot; only install ONS 15600 cards with a cross symbol on the faceplate
Chapter 2, "Card Reference,"
shows the power requirements for an individual fan in a fan tray.
Watts
12
46
for more information about ONS 15600 cards.
Cisco ONS 15600 Reference Manual, R7.0
1.11 Cards and Slots
Amps
BTU/Hr.
0.25
41
0.95
157
1-17
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