 | Copyright © 1998-2003, Juniper Networks, Inc. All Rights Reserved. | |
Physical Interface Cards (PICs) physically connect the router to network media. They are housed in Flexible PIC Concentrators (FPCs); for more information about FPCs, see Flexible PIC Concentrators (FPCs).
PICs receive incoming packets from the network and transmit outgoing packets to the network, performing framing and line-speed signaling for their media type as required. PICs also encapsulate outgoing packets received from the FPCs before transmitting them. The controller ASIC on each PIC performs additional control functions specific to the PIC media type.
The router supports various PICs, including ATM, Channelized, Gigabit Ethernet, IP Services, and SONET/SDH interfaces. For complete PIC specifications, see the M5 and M10 Internet Routers PIC Guide.
Some PICs, such as selected Gigabit Ethernet PICs, accept small form factor pluggables (SFPs), which are fiber-optic transceivers that can be removed from the PIC. Various SFPs have different reach characteristics. You can mix them in a single PIC and change the combination dynamically. SFPs are hot-removable and hot-insertable, as described in Field-Replaceable Units (FRUs). For SFP replacement instructions, see Replace an SFP. For information about PICs that use SFPs, see the M5 and M10 Internet Routers PIC Guide.
Up to four regular PICs install into an M5 router and up to eight regular PICs install into an M10 router, as shown in Figure 1 and Figure 2. The PIC slots on an M5 router and in the upper FPC on an M10 router are numbered from 0/0 (zero/zero) through 0/3, right to left. The PIC slots in the lower FPC on an M10 router are numbered from 1/0 (one/zero) through 1/3, right to left. The slot number for a PIC appears next to its offline button on the craft interface (see PIC Offline Buttons). The number of ports on a PIC depends on the type of PIC.
Quad-wide PICs, such as the 4-port Gigabit Ethernet and OC-48/STM-16 SONET/SDH PICs, occupy all four slots in an FPC. Some quad-wide PICs might not be supported on both the M5 and M10 routers; for more information, see the M5 and M10 Internet Routers PIC Guide.
Both regular and quad-wide PICs are hot-removable and hot-insertable. A removed PIC no longer receives or transmits data, and removing or inserting a PIC briefly interrupts forwarding of traffic through the remaining PICs.
For PIC replacement instructions, see Replace a PIC.
Most PICs supported on the M5 and M10 routers have the following components. For complete specifications, see the M5 and M10 Internet Routers PIC Guide. For information about pinouts for PIC cable connectors, see Cable Connector Pinouts.
| Copyright © 1998-2003, Juniper Networks, Inc. All Rights Reserved. | |