363-206-305
Technical Specifications
Issue 3 June 2000
10-53
Office Alarms
10
The office alarms interface is a set of discrete relays that controls office audible
and visual alarms. Separate relays handle critical, major, and minor alarms. Each
contact closure is rated at 1 A, 60 V maximum. The CR and MJ alarms can be
wire-ORed. The critical alarm relays are fail safe against unprotected power
failures.
User-Definable Miscellaneous Discrete
Environmental Alarms and Controls
10
The user-definable miscellaneous discrete environmental alarm and control
interface allows the DDM-2000 FiberReach Multiplexer to monitor and control
collocated equipment at the remote site. At the remote terminal (RT) site, 21
alarm or status environmental inputs can monitor environmental conditions (for
example, open door, high temp); these inputs are activated by contact closures.
The 15th environmental alarm or status input is provided to monitor the condition
of the power shelf and fans at the RT site; this closure is activated by
−
48 V DC.
Four environmental control outputs are provided to control external equipment (for
example, pumps or generators). The miscellaneous discrete outputs (control
outputs at an RT, alarm/status outputs at a CO) tolerate
−
60 V maximum open
circuit voltage and 35 mA maximum current. Transient voltages up to
−
135 V are
tolerated for up to 1 ms. The miscellaneous discrete inputs provide
−
48 V nominal
(
−
60 V maximum) open circuit voltage and 2 mA maximum current.
The miscellaneous discrete output closures generated by the optoisolator require
external voltage and ground to operate.
TL1/X.25 Interface
10
A TL1/X.25 interface to a DDM-2000 FiberReach Multiplexer is provided through a
host system (for example, a DDM-2000 OC-3 Multiplexer). The DDM-2000
FiberReach Multiplexer host supports a TL1/X.25 interface for communication
between local and remote DDM-2000s, and alarm surveillance and provisioning
operations systems such as Telcordia Technologies's Network Monitoring and
Analysis (NMA) and Operations Systems/Intelligent Network Element (OPS/INE)
operations systems. The DDM-2000 OC-3 Multiplexer TL1/X.25 interface is based
on Telcordia Technologies TR-TSY-000833, Issue 5.
Lucent 2000 Product Family OI Specifications
10
Applicable for Release 2.2 only:
Maximum number of NEs per subnetwork 50
Maximum number of alarm groups per subnetwork 255
Maximum number of NEs per alarm group 25
Maximum number of directory services NEs per subnetwork 1
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