Bits Input Ports; Alarm Relay Contacts; Figure 26: M40E Routing Engine Interface Ports For Host Module 0 - Juniper M40E Hardware Manual

BITS Input Ports

Alarm Relay Contacts

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For information about the pinouts for the connectors, see "RJ-45 Connector Pinouts for
the M40e Routing Engine MGMT Port" on page 289.
Figure 26 on page 41 shows the ports that connect to the Routing Engine installed in slot
RE 0. The arrangement of ports for the Routing Engine installed in slot

Figure 26: M40e Routing Engine Interface Ports for Host Module 0

In the center of the CIP are two ports labeled
Use two DB-9 connectors to connect external clock inputs for 19.44-MHz Stratum 3
reference clocks (supported in Junos OS Release 8.3 and later).
For information about the pinouts for the connectors, see "DB-9 Connector Pinouts for
the M40e CIP BITS Input Ports" on page 293. For information about configuring an external
synchronization interface, see the Junos OS System Basics Configuration Guide.
At the bottom of the CIP are two relay contacts for connecting the router to external
alarm-reporting devices, the upper labeled
(see Figure 27 on page 42). A system condition that causes the red or yellow alarm LED
to light on the craft interface also activates the corresponding alarm relay contact. For
instructions for attaching a device to the alarm relay contacts, see "Replacing Alarm
Relay Wires on the M40e Router" on page 167.
Chapter 2: M40e Hardware Components
BITS A and BITS B (see Figure 27 on page 42).
RED ALARM and the lower
RE 1 is the same.
YELLOW ALARM
41