Hardware Information for JUNOS Software Release 9.3 for J-series Services Routers

Power and Heat Dissipation Requirements for J-series PIMs

On J-series Services Routers, the system monitors the PIMs and verifies that the PIMs fall within the power and heat dissipation capacity of the chassis. If power management is enabled and the capacity is exceeded, the system prevents one or more of the PIMs from becoming active.

Caution: Disabling power management can result in hardware damage if you overload the chassis capacities.

You can also use CLI commands to choose which PIMs are disabled. For details about calculating the power and heat dissipation capacity of each PIM and troubleshooting procedures, see the J2320, J2350, J4350, and J6350 Services Router Getting Started Guide.

Supported Third-Party Hardware

The following third-party hardware is supported for use with J-series Services Routers.

USB Modem

We recommend using a Multi-Tech MultiModem MT5634ZBA-USB-V92 USB modem with J-series Services Routers.

Storage Devices

The USB slots on J-series Services Routers accept a USB storage device or USB storage device adapter with a compact flash disk installed, as defined in the CompactFlash Specification published by the CompactFlash Association. When the USB device is installed and configured, it automatically acts as a secondary boot device if the primary compact flash disk fails on startup. Depending on the size of the USB storage device, you can also configure it to receive any core file generated during a router failure. The USB device must have a storage capacity of at least 256 MB.

Table 3 lists USB and compact flash storage devices supported for use with the J-series routers.

Table 3: Supported Storage Devices on the J-series Services Routers

Manufacturer	Storage Capacity	Third-Party Part Number
SanDisk—Cruzer Mini 2.0	256 MB	SDCZ2-256-A10
SanDisk	512 MB	SDCZ3-512-A10
SanDisk	1024 MB	SDCZ7-1024-A10
Kingston	512 MB	DTI/512KR
Kingston	1024 MB	DTI/1GBKR
SanDisk—ImageMate USB 2.0 Reader/Writer for CompactFlash Type I and II	N/A	SDDR-91-A15
SanDisk CompactFlash	512 MB	SDCFB-512-455
SanDisk CompactFlash	1 GB	SDCFB-1000–A10

J-series Compact Flash and Memory Requirements

Table 4 lists the compact flash and DRAM requirements for all J-series Services Routers.

Table 4: J-series Compact Flash and DRAM Requirements

Model	Minimum Compact Flash Required	Minimum DRAM Required	Maximum DRAM Supported
J2300	256 MB	512 MB	1 GB
J2320	256 MB	512 MB	1 GB
J2350	256 MB	512 MB	1 GB
J4300	256 MB	512 MB	1 GB
J4350	256 MB	512 MB	2 GB
J6300	256 MB	512 MB	1 GB
J6350	256 MB	1 GB	2 GB