Installation Guide

SAR-Hm and SAR-Hmc Chassis Installation Guide 7705 SAR-Hm and 7705 SAR-Hmc Overview
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When making a connection to an RS-232 port, a shielded cable grounded at both
sides must be used to maintain EMC compliance (an 8-conductor cable is required
on the 7705 SAR-Hm and a 4-conductor cable is required on the 7705 SAR-Hmc). If
a connection to both RS-232 ports on the RJ-45 connector is required on the
7705 SAR-Hmc, a 7705 SAR-Hmc RS-232 Y-Cable (3HE12554AA) is required.
See RS-232 Ports Pinout Assignments for pinout assignments. Refer to the
7705 SAR-Hm and 7705 SAR-Hmc Main Configuration Guide for more information
about how to configure and use these ports.
3.2.1.5 Console Port
The 7705 SAR-Hm and 7705 SAR-Hmc have a serial Console port that uses an
RJ-45 connector to provide access to an RS-232 CLI craft terminal interface. The
craft terminal is used during initial startup procedures, as described in Powering Up
and Initializing. The Console port is not a permanent connection and must be used
only for installation and maintenance routines.
A shielded cable grounded at least at one end must be used.
See Console Port Pinout Assignments for pinout assignments.
3.2.1.6 Alarms Port
The 7705 SAR-Hm and 7705 SAR-Hmc have an Alarms port that uses an RJ-45
connector to monitor and report external alarms. In a remote or outdoor deployment,
alarm inputs typically allow an operator to detect conditions such as whether a door
is open or closed or an air conditioner fault has occurred.
The Alarms port on the 7705 SAR-Hm supports three input and two output pins. The
Alarms port on the 7705 SAR-Hmc supports three input pins. Pins can be configured
to indicate the severity level of an event and the normally open/normally closed state.
When an input pin changes state, the router can generate log events and raise facility
alarms. For more information about input and output alarms and the Alarms port
pinout assignments, see Alarms Port Pinout Assignments.
A shielded cable grounded at both ends must be used. For connections within the
7705 Outdoor Enclosure (a connection to the door alarm switch, for example), the
shielded cable can be grounded at the 7705 SAR-Hmc Alarms port only.