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Installation and Operation Manual
Chapter 1 Introduction
Alarm Reporting
The alarms stored in the FCD-E1 alarm buffer can be transmitted automatically
through the serial management access ports, for display on a supervision terminal;
when SNMP management is used, alarms are also sent to user-selected
management stations as traps.
FCD-E1 with two RS-232 interfaces has an additional serial port that can be
configured to operate as a dial-out port, for automatic reporting of alarms to
remote locations. This port is intended for connection to a Hayes or
Hayes-compatible dial-up modem. The user, in accordance with the following
options can program the reporting method:
•
Always send a report whenever a new alarm condition is detected.
•
Send a report only upon the detection of a major alarm.
•
Reporting disabled (no dial-out function).
When it is necessary to report an alarm condition, the FCD-E1 system initiates the
call set up, and then, after the destination answers, sends the complete contents of
the alarm buffer. Following the transmission of the alarm buffer contents, the
FCD-E1 system disconnects automatically.
To increase reporting reliability, the user can define the number of dialing retries,
and an alternate directory number to be called in case the primary directory
number cannot be reached. If nevertheless the call cannot be established, the full
contents of the buffer will be sent the next time a call is set up.
To expedite the handling of alarms and reduce the information load during system
malfunctions, the system operator can mask alarm conditions, to prevent
continuous reporting of known alarm conditions, e.g., during maintenance
activities.
1.4
Electrical E1
Main Link and
Sublink
Technical Specifications
Framing
• G732N, 2 frames per multiframe, CRC-4 option
disabled
• G732N, 2 frames per multiframe, CRC-4 option
enabled
• G732S, 16 frames per multiframe, CRC-4 option
disabled
• G732S, 16 frames per multiframe, CRC-4 option
enabled
• Unframed (main link only)
Bit Rate
2.048 Mbps
Line Code
HDB3
Line Impedance
FCD-E1
Balanced interface
120Ω
Unbalanced
interface
75Ω
Technical Specifications
1-27