Specifications

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FPC1 and FPC2
The router supports two types of FPC:
§ FPC1—Supports single-port OC-12 and Gigabit Ethernet PICs.
§ FPC2—Supports higher-speed OC-48 and Tunnel PICs.
The router can operate with any combination of FPC1s and FPC2s installed.
The installation and removal of the two FPC types is identical. PICs that can be
inserted on an FPC2 are distinguished by having an offline button on their
faceplate. The FPC1 has built-in offline buttons for the PICs it holds. In this
document, both the FPC1 and FPC2 are referred to simply as “FPC” except
where the differences between the two are being discussed.
Physical Interface Cards (PICs)
You can install up to four Physical Interface Cards (PICs) into slots on each FPC.
PICs provide the physical connection to various network media types. PICs
receive incoming packets from the network and transmit outgoing packets to the
network. During this process, each PIC performs framing and line-speed
signaling for its media type. Before transmitting outgoing data packets, the PICs
encapsulate the packets received from the FPCs. Each PIC is equipped with an
ASIC that performs control functions specific to the PIC’s media type.
PICs are hot-removable and hot-insertable.
PIC LEDs
Each port on each PIC has one LED, located on the PIC faceplate below the
optical transceiver. The Tunnel PIC, which has no ports, has a single LED. Each
LED has four different states.
PIC Offline Buttons
Each PIC has an offline button used for hot-removing the PIC from an operating
router. The SDH/SONET OC-48 and Tunnel PICs that insert into an FPC2 each
have an offline button on their faceplates. For the SDH/SONET OC-12, ATM OC-
12, and Gigabit Ethernet PICs that insert into an FPC1, the offline button is on the
FPC1 card carrier.
PIC Media Types
PICs for the M160 router support the following network media types:
§ ATM OC-1 2
§ Channelized OC-12
§ Gigabit Ethernet
§ SDH/SONET OC-12, OC-48 and OC-192
§ Tunnel
You can install ATM OC-12, channelized OC-12, Gigabit Ethernet, or SONET
OC-12 PICs on a single FPC in any of the four PIC slots. For example, you can
install an OC-12 SONET PIC, an OC-12 ATM PIC, a Gigabit Ethernet PIC, and a
channelized OC-12 PIC on the same FPC.
The FPC1 can accommodate an aggregate throughput of up to OC-48 (3.2
Gbps). The FPC2 can accommodate an aggregate throughput of up to OC-192
(12.8 Gbps). The SONET OC-192 PIC is a "quad-wide" interface card that
occupies an entire FPC slot. You can install a SONET OC-192 PIC into any FPC
slot.
The number of ports on each PIC and the number of PICs that can be installed in
a single FPC depend on the network media type (PIC interface) and the FPC
type.
PFE Clock Generators (PCGs)
The router has two PFE Clock Generators (PCGs). They are located in the rear of
the chassis to the right of the Routing Engine slots. The PCGs supply the 125-
MHz system clock to the modules and ASICs making up the Packet Forwarding
Engine. The PCGs both send clock signals to the Packet Forwarding Engine
modules, along with a signal indicating which is the master clock source. The
master Routing Engine controls which PCG is master and which is backup.
The PCGs are field-replaceable and hot-pluggable.
PCG Components