Juniper Networks J-series Services Router J2320 - Manual (Page 73)

1000Base-SX, 1000Base-LX, and 1000Base-T SFPs. They do not support
1000Base-LH SFPs.
1000Base-SX and 1000Base-LX SFP transceivers have the following characteristics:
■ Duplex LC/PC connector (Rx and Tx).
■ Optical interface support—See the J-series Services Router Administration
Guide.
■ 8-port and 16-port Gigabit Ethernet uPIMs—and SFPs on the 1-port and 6-port
uPIMs—support 1000Base-T RJ-45 connectors.
For pinouts of cable connectors for Gigabit Ethernet uPIMs, see “Gigabit Ethernet
uPIM RJ-45 Connector Pinout” on page 233.
Limitations. Gigabit Ethernet uPIMs have the following limitations:
■ Gigabit Ethernet uPIMs do not support SNMP.
■ Gigabit Ethernet uPIM interfaces can be configured up to a maximum MTU size
of 9014 bytes.
Installation. Gigabit Ethernet uPIMs can be inserted in any slot on J2320, J2350,
J4350, or J6350 Services Routers.
Throughput for a uPIM is higher when it is inserted in a high-speed slot. High-speed
slots are slots 3 and 6 on the J4350 router, and slots 2, 3, 5, and 6 on the J6350
router.
16-port Gigabit Ethernet uPIMs are two slots high. Because the connector on the PIM
is on the lower half, the PIM occupies the slot that it is plugged into and the slot above
it. Thus you cannot install a 16-port uPIM in the top slots of a router. For example,
on a J4350 router you cannot install a 16-port uPIM in slots 1 and 4. If you install
the PIM in slot 2, it occupies both slots 2 and 1.
To install or remove a PIM, see “Replacing a PIM” on page 172.
Interface LEDs. For 8-port and 16-port Gigabit Ethernet uPIMs, the activity LED is
located on the left side of each port, and the link LED is located on the right side of
each port. For the 6-port Gigabit Ethernet uPIM, the LEDs are located to the right of
each port, with the link LED above the activity LED. LEDs on the 1-port uPIM are
clearly labeled.Table 21 on page 51 describes the meaning of the LEDs.
Table 21: Gigabit Ethernet Port LEDs
Description State Color Function
Port is online. On steadily Green Link
Port is offline. Off Unlit
Port is transmitting or receiving traffic. Blinking Green Activity
(TX/RX)
Port might be online, but it is not
receiving traffic. Off Unlit
Field-Replaceable PIMs ■ 51
Chapter 3: PIM and VoIP Module Overview