Card Cage And Midplane; Table 2: Chassis Environmental Specifications; Table 3: Card Cage And Midplane Specifications - Juniper G10 CMTS Hardware Manual

Table 2: Chassis Environmental Specifications

Card Cage and Midplane

The card cage is the main section of the chassis that houses all the modules, which are based
on circuit cards. Card cage and midplane specifications are described in Table 3. The bays for
the power supplies and power transition modules sit above the card cage, and the bays for
the fans sit below it (see Figure 4 on page 11).

Table 3: Card Cage and Midplane Specifications

The midplane is the passive electrical interconnecting device for all modules in the chassis. It
complies with CompactPCI Specification 2.0 R3.0, Oct.1, 1999. Analogous to a backplane, the
midplane resides towards the middle of the chassis with connectors facing front and rear (see
Figure 8 on page 15).
The G10 CMTS does not use all connector columns on the midplane. The DOCSIS Modules,
HFC Connector Modules, and SIMs are an 8 horizontal pitch (HP), double-wide design
covering two columns. The Chassis Control Modules and Hard Disk Modules are a 4 HP,
single-wide design. Midplane slot 8 is not used. This is reflected in the slot numbering
scheme.
The midplane extends the width of the chassis and the height of the chassis minus the top
and bottom air chambers.
Specification
Ambient temperature range (operational)
Ambient temperature range (nonoperational)
Altitude
Relative humidity
Vibration (operational)
Specification
Standard module dimensions
Midplane dimensions
Midplane card slots
Module capacity
(each front and rear)
Value
0° to +40°C (0° to +104°F)
–35° to +60°C (–31° to +140°F)
60 m (197 ft.) below sea level to 1800 m (5,905 ft.)
10% to 90% non-condensing
5 Hz to 100 Hz and back to 5 Hz, at 0.1 g (0.1 oct/min)
Value
Module Face Plate
262 mm (10.3 in., 6 U) height
20 mm (0.8 in.) width, single-wide
40 mm (1.6 in.) width, double-wide
Module Circuit Card
233 mm (9.2 in.) height
340 mm (13.4 in.) depth - front modules
80 mm (3.2 in.) depth - rear modules
487 mm (19.2 in.) height
428 mm (16.8 in.) width
13 slots spanning 21 connector columns
8 double-wide modules (16-slot equivalent)
4 single-wide modules
1 unused single-wide slot
Hardware Component Overview
Chassis
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