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Installing a Stinger MRT
System clocking
Serial connection of a console terminal to the female DB-9 serial port (labeled
CONSOLE) on the chassis, by an RS-232 shielded straight-through cable. For
details, see "Making the initial administrative connection" on page 6-2.
Dial-in connection through a modem.
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Network connection through an Ethernet network via the Ethernet RJ-45
interface on the unit, by a 10BaseT unshielded twisted pair (UTP) cable. For
details, see "Connecting to an Ethernet LAN" on page 6-10.
See Appendix C, "Cables and Connectors" for details about cable pinouts.
System clocking
A Stinger MRT has three possible timing sources:
External. The Stinger MRT can accept timing from a T1 line, or a building
integrated timing supply (BITS) clock.
Trunk. The unit can accept timing from an OC3 or DS3 line clock.
Internal clock source. If the selected clock sources fail, the system is automatically
reconfigured so that it is synchronized with the internal clock.
The T1 or BITS timing inputs work with DS1 timing references that comply with the
ANSI T1.102 standard. The system timing is configured via the TAOS command line
interface.
Alarm monitoring
The ALARM RELAY connector has outputs that allow a Stinger MRT to be monitored
remotely by another device. This connector also has inputs that allow a Stinger MRT
to perform remote monitoring of up to four other devices.
Connecting to monitor Stinger MRT alarm status
A Stinger MRT unit can monitor itself for major and minor alarm conditions and
illuminate appropriate status lights on the chassis. In addition, you can connect audio
and visual alarms (normally open, or normally closed) to monitor the unit remotely
for these conditions.
Alarm relays operate during loss of power, during hardware failure, or whenever a
Stinger MRT is being reset, such as during its power-on self test (POST). During
normal operation, the alarm relays remain idle.
The gauge of the wire you use to connect to the Stinger MRT alarm relay must be
based on the current flow of the circuit that the relay is attached to and the capacity
of the alarm relay. Because the Stinger alarm relay can carry a maximum of 2 amps,
18 AWG to 20 AWG (0.8mm² to 0.5mm²) wire is adequate.
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An external modem can be connected to the serial (CONSOLE) connection of
the Stinger MRT with an RS-232 shielded crossover cable. For details, see
"Connecting to and configuring an external modem" on page 6-11.
The model MRT-AD-36S-56K chassis is equipped with an internal
autoanswer modem that can be connected directly to a telephone line via the
RJ-11 jack labeled MODEM. For details, see "Connecting to and configuring
an internal modem" on page 6-12.
Stinger® MRT Getting Started Guide
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