Miscellaneous discrete inputs and outputs
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MDIs and MDOs
A network element contains Miscellaneous Discrete Inputs (MDI) and Miscellaneous
Discrete Outputs (MDO).
• MDIs are inputs to a network element for external equipment. MDIs can be
monitored by the management system.
• MDOs are outputs from a network element used to drive external equipment.
MDOs can be activated or deactivated by the management system.
Objective
MDIs can be used to collect status information from other transmission equipment or
to monitor external events (for example a door contact).
MDOs are used to drive external equipment or to influence the behavior of equipment
external to the system.
About
The 1643 AM or 1643 AMS contains four MDIs and four MDOs.
To help with general purpose surveillance, each network element MDI and MDO can
be given a unique name, which is stored in the management system. The name can be
no longer than 26 characters.
The 1643 AM or 1643 AMS supports a specific alarm supervision via the MDI and
MDO contacts which allows to supervise the MDI status of several NEs and signal an
alarm condition via the MDO contact of a dedicated 1643 AM or 1643 AMS in a
central location without the intervention of a management system.
The user can select between three alarm signaling modes:
• Local Alarms signaling
• Centralized Alarms signaling
• Centralized MDI signaling.
Outcome
With the MDIs, external events are reported to the management system via the alarm
representation. If this event occurs an alarm is raised. Also, the severity of these alarms
can be set. Once provisioned, MDOs can place external equipment under the system’s
control.
Equipment provisioning
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
5-11
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