Appendix A Technical Specifications
Product Architecture
A-22
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Scheduler
The scheduler handles requests from the line cards for access to the CSF. When
the scheduler receives a request from a line card for CSF access, the scheduler
determines when to allow the line card access to the CSF.
Switch Fabric
Switch fabric circuitry carries the user traffic between line cards or between the
RP and the line cards.
Power Entry Modules
The Cisco 12404 router chassis supports two 1100 W online insertion and
removal hot swappable PEMs. Each unit is capable of delivering up to 1100 W at
–54.5 VDC. The router PEMs are hot swappable and the router must be populated
with two PEMs to meet EMI standards.
Caution
Do not mix PEM types in the router. In multiple PEM system configurations, all
PEMs must be of the same type; either all AC PEMs for AC powered routers, or
all DC PDUs and DC PEMS for DC powered routers.
A hardwired DC power source, power cable is required from the site DC power
source to the DC PDU on the chassis. The DC power cable leads are 4 American
Wiring Gauge (AWG) high strand count wire.
For detailed handling and replacement instructions for the Cisco 12404 router
PEMs, see the appropriate configuration note which accompanies each AC PEM,
DC PEM, or DC PDU that is shipped from the factory as a FRU.
AC Power Entry Module
The AC PEM (
) measures 6.60 inches (16.76 cm) deep by 14.30 inches
(36.32 cm) wide by 3.50 inches (8.89 cm) high and weighs 11.0 lbs (5.0 kg).
The router is configured to customer specifications from the factory. If 1 AC PEM
is requested, 2 AC PEMs are shipped.
todd.book Page 22 Tuesday, November 27, 2007 6:02 PM
