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P/N 480-0005-00-15 2-3
Chapter 2: Hardware Components
Chassis - CMS (14 Slot)
The chassis is the 19” rack-mountable unit which houses all WAN cards, System Controller/CPU cards, DSP
cards, and power supplies. The two system fans are installed at the top of the chassis. See the following sec-
tions for unit front and unit back details; both the AC version and DC versions are illustrated and explained.
Front (with AC power)
NOTE: For pictorial purposes, Figure 2-1 shows the unit with 1 DS1 card and the CPU card.
Figure 2-1 Tenor CMS Front View - AC unit
• Card Slots. Fourteen slots are available for WAN cards, DSP Resource Cards, DS1 cards, and the CPU/
System Controller Card.
• Power Supplies. Two load-sharing AC power supplies. The load sharing feature enables one power sup-
ply to take over if the other fails.
• System Fans. Two system fans, accessible through a swing down panel via thumb screws are used to
cool the chassis. These fans are “hot-swappable”, meaning you can remove/replace the fans while the
unit is operational.
• Reset Button. Enables you to reset the system. This function will be supported in a future release.
• Ground Strap Socket. A ground connection is provided for ESD protection.
0
1
Reset +3.3V +5V + 12V -12V
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Ground
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CPU PCI
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Ethernet
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Hot Swap
CPU
Hot Swap
DS1
StatusAlarm
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PCI
CPU
BankDSP
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TX/RXLink
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3
4
5
6
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Ground Strap Socket
Air Inlet
Reset
Button
Chassis LEDs
On/Off Power
System Fans
WAN
Power
Supplies
Card Slots
Air Filter