Card Structure and Dimensions
Card Structure
The routers support MIC, service interface card (SIC), wide service interface card (WSIC), extended service interface card (XSIC), and service and router unit (SRU) cards. These cards have the same structure, and a WSIC card is used as an example here.
Figure 6-1 shows the appearance of a WSIC card.
1. Card name silkscreen |
2. Indicator |
3. Captive screw |
4. Handle |
5. Front panel plate |
6. Ports |
7. Printed circuit board (PCB) |
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A card consists of:
The PCB contains all the functional chips and is the core of the card The PCB provides indicators, buttons, and ports on the front panel. PCBs of some cards provide space for installing daughter cards.
Different cards provide different indicators, buttons, and ports. Some cards support daughter cards, while some cards do not. For details, see the description of specific cards.
- Front panel, consisting of screws, ejector levers, and plate.
- Screws: fix the card into the chassis.
- Ejector lever: allows you to insert and remove the card.
- Plate: connects the ejector levers and the PCB. Labels, such as the bar code and laser label, are also attached on the plate.
Card Dimensions
Figure 6-2 illustrates the dimensions of a card.
The card dimensions are defined as follows:
- Depth: distance between the top of an ejector lever and the end of the PCB
- Width: longest distance between the tops of two ejector levers
- Height: height of the front panel
Table 6-1 lists the typical cards supported by the router.
Card Type |
Dimensions (H x W x D) |
|---|---|
MIC card |
18.70 mm x 67.86 mm x 87.55 mm (0.74 in. x 2.67 in. x 3.45 in.) |
SIC card |
19.82 mm x 100.1 mm x 223.5 mm (0.78 in. x 3.94 in. x 8.80 in.) |
WSIC card |
19.82 mm x 201 mm x 223.5 mm (0.78 in. x 7.91 in. x 8.80 in.) |
XSIC card |
40.14 mm x 201 mm x 223.5 mm (1.58 in. x 7.91 in. x 8.80 in.) |
SRU/EXSIC card |
40.14 mm x 402.8 mm x 270.85 mm (1.58 in. x 15.86 in. x 10.66 in.) |