> Line Card Installation
> This chapter provides information on chassis configurations and instructions for installing line cards.
> Chassis Slot Numbering and Assignments
> The chassis has 32 rear-loaded slots for line cards. This allows for the installation of redundant components and provides ample space for expanding the system.
> There are two rows of slots on the rear of the chassis. The upper row of slots is labeled 17 through 32 from right to left. The lower row of slots is labeled 33 through 48 from right to left.
> Chassis Rear Slot Numbering
> The following table shows the front slot numbers and their corresponding rear slot numbers.
> Front and Rear Slot Numbering Relationship

> Position | Slot Number
> Front | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1
> Rear Top Slots | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17
> Rear Bottom Slots | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33

> The following line cards are available for the chassis:

> l | Switch Processor Input/Output (SPIO) Card: SPIOs are installed in chassis slots 24 and 25 behind SPCs. SPIOs provide interfaces for local and remote management, Central Office (CO) alarming, and eventually, Building Integrated Timing Supply (BITS) timing.

> l | Ethernet 10/100 Card: Ethernet 10/100 cards are installed directly behind their corresponding PACs. Each card provides eight 10/100Base-T RJ-45 Ethernet interfaces that are used as either the R-P or the Pi interfaces for the 3G wireless data application.

> l | Ethernet 1000 Card: Ethernet 1000 cards are installed directly behind their corresponding PACs. Each card provides a single 802.3z-compliant gigabit Ethernet converter with a Small Form-factor Pluggable (SFP) module. Supported modules provide optical or RJ-45 interfaces.

> l | Redundant Crossbar Card (RCC): RCCs are installed in the lower-middle two slots, directly behind the SPCs. RCCs provide a redundant data and control path link between each line card and all PACs. There are no external interfaces on the RCC. Internally, it provides redundant 5Gbps serial links to each PAC.

> The following table provides information for the specific chassis slot assignments for each of the card types.

> Line Card Slot Assignments
> Line Card Type | Chassis Slot Number | Description
> Switch Processor Input/Output (SPIO) | 24 | Resides behind Primary SPC in slot 8.
> 25 | Resides behind Redundant SPC in slot 9.
> Redundancy Crossbar Card (RCC) | 40 | Resides behind Primary SPC in slot 8. It provides redundancy for all PAC application cards and for line cards installed in the upper-rear chassis, slots 17 through 23 and 26 through 32.
> 41 | Resides behind Redundant SPC in slot 9. It provides redundancy for all PAC application cards and for line cards installed in the lower-rear chassis, slots 33 through 39 and 42 through 48.
> Ethernet 10/100 | 17 through 23, 26 through 39, or 42 through 48 | Resides directly behind its corresponding PAC. Each PAC can support up to two Ethernet 10/100 cards. The active card is installed in the upper rear chassis slot. The redundant card is installed in the lower rear chassis slot.
> Ethernet 1000 | 17 through 23, 26 through 39, or 42 through 48 | Resides directly behind its corresponding PAC. Each PAC can support up to two Ethernet 1000 cards. The active card is installed in the upper rear chassis slot. The redundant card is installed in the lower rear chassis slot.

> For more detailed information, refer to the Hardware Installation Overview chapter.
> Line Card Redundancy
> To optimize network efficiency and minimize down time, the system supports 1:1 redundancy for the Ethernet 10/100 and Ethernet 1000 line cards.
> Line cards are installed in the half-height slots at the rear of the chassis. This design allows two Ethernet line cards directly behind every PAC that normally operates in active mode.
> When two line cards are installed, the card in the upper-rear chassis slot is automatically the active card. The card in the lower-rear chassis slot is automatically placed in standby mode. In the event that the active card experiences a failure, the system automatically migrates traffic to the standby card in the lower slot.
> Recommended Minimum Chassis Configuration
> An absolute minimum chassis configuration consists of one SPC and one PAC for ST16 systems, and their respective line cards. However, it is strongly recommended that redundant components be used to minimize the risk of system outage.
> Therefore, the recommended minimum chassis configuration consists of the following:
> ST16 Recommended Minimum Chassis Configuration

> Application Card | Application Card Slot Number | Associated Interface Card | Line Card Slot Number
> SPC | 8 | SPIO | 24
> RCC | 40
> Redundant SPC | 9 | SPIO | 25
> RCC | 41
> PAC (data application only) | 2 | Ethernet 10/100 | 18 and 34
> Redundant Ethernet 10/100
> PAC (data application only) | 4 | None required | N/A
> Redundant PAC (data application only) | 11 | None required | N/A

> Installing Line Cards
> This section provides instructions for adding half-height line cards to the chassis.
> ESD During installation, maintenance, and/or removal, wear grounding wrist straps to avoid ESD damage to the components. Failure to do so could result in damage to electrical components and could potentially void your warranty.

> 1 | Determine the type of line card you are installing. Each line card is identified by the text near the bottom of its front panel.

> 2 | Determine which chassis slot to install the card in based on the information in the Chassis Slot Numbering and Assignments section.

> 3 | Remove the blanking panel covering the slot, if one is installed.

> a | Use a #2 Phillips screwdriver to loosen the screw at the top of the blanking panel.

> b | Use a #2 Phillips screwdriver to loosen the screw at the bottom of the blanking panel.

> c | Hold the screws on the blanking panel, and pull the blanking panel away from the chassis to expose the chassis slot.

> 4 | Hold the card by its ejector levers and align the card with the upper and lower card guides of the chassis slot. Gently slide it into the slot until the levers touch the chassis frame.

> CAUTION: To avoid damaging the card’s interlock switch, ensure that it is completely down prior to proceeding. For additional information, refer to the Hardware Installation Overview chapter.

> 5 | Push the ejector levers inward firmly until the card is firmly seated in the chassis midplane and the ejector levers can be pushed in no further. Press firmly on the card’s faceplate to ensure that it is fully seated. The card’s from panel should be flush against the chassis’ upper and lower card mounts for the slot.

> 6 | Raise the interlock switch on the front panel of the line card to lock the ejector tab in place. The flange on the left-side of the interlock switch prevents movement of the ejector tab when raised completely.

> IMPORTANT: Make sure the interlock switch is fully raised to properly secure the line card’s top screw to the chassis.

> 7 | Use a #2 Phillips screwdriver to tighten the screws at the top and bottom of the line card’s front panel to secure the card to the chassis.

> 8 | Repeat step 1 through step 7 for every other line card that to be installed.

> 9 | Install blanking panels over any unused chassis slots.

> WARNING: To reduce the risk of electric shock and to ensure proper ventilation, blanking panels must be used to cover any chassis slot that is not occupied by an application card.
> Leere Steckplaetze muessen mit der dafuer vorgesehenen Abdeckplatte geschlossen werden, um die Luftzirkulation innerhalb des Geraets zu gewaehrleisten und um einen elektrischen Schlag zu vermeiden.

> a | Position the blanking panel over the unused chassis slot.

> b | Use a #2 Phillips screwdriver to tighten the screw at the top of the blanking panel to secure the panel to the chassis.

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