Installing a Stinger FS or Stinger FS+
System clocking
Stinger® FS/Stinger FS+ Getting Started Guide
2-13
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Network connection through an Ethernet network using the Ethernet RJ-45
interface on the control module, using a 10BaseT or 100BaseT unshielded twisted
pair (UTP) cable.
For more information about these connections, see “Primary (or single) control
module configuration” on page 4-4 and “Administrative connections” on page 5-2.
System clocking
An active control module has four possible timing sources:
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External. The Stinger unit can accept timing from a T1 line, or a building
interoffice timing source (BITS) clock.
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Trunk. The Stinger unit can accept timing from an OC3, DS3, or E3 line clock.
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LIMs. The Stinger unit can accept timing from an ADSL or SDSL line clock.
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Internal clock source. If the selected clock sources fail, the system is automatically
reconfigured so that it is synchronized with the control module’s 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 through the TAOS
command-line interface. For more information, see “Configuring system clocking” on
page 5-19.
Alarm monitoring
The alarm relay in the alarm relay panel can be connected to external hardware that
monitors the status of the Stinger unit.
With a revision 2 or revision 2.1 control module installed, you can use the Stinger
unit to monitor the status of up to seven external devices.
Connecting to monitor Stinger alarm status
The Stinger FS and Stinger FS+ units are equipped with an alarm relay panel that
contains alarm terminals for the unit. The unit can monitor itself for major and minor
alarm conditions and illuminate appropriate status lights on the control module. In
addition, you can connect audio and visual alarms (normally open, contact closed) to
the alarm terminals to remotely monitor the unit for these conditions.
The alarm board panel on the back of the unit, between the power filters, contains
three sets of connectors for connecting the following:
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Major alarms
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Minor alarms
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External BITS clock
The alarm-relay contacts open during loss of power, during hardware failure, or
whenever the Stinger unit is being reset, such as during its power-on self test (POST).
During normal operation, the alarm-relay contacts remain closed.
The gauge of the wire you use to connect to the Stinger 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.
