14-07-2012, 02:34 PM
WORKING OF SIEMENS HIPATH ELECTRONIC EXCHANGE
[attachment=27664]
Overview Of Communication Systems in VSP:
In Visakhapatnam steel plant very wide range of communication systems are provided for meeting the day-to-day internal and external communication needs.
These communication needs are broadly classified as follows:
General-purpose communication systems.
Process communication systems
Monitoring and signaling systems.
General Purpose Communication Systems:
The following facilities are provided under category of communication and signaling systems.
4000 lines electronic exchange plant.
3000 lines electronic exchange in township.
128 lines electronic exchange in township .
AC incomer unit
The Exchange is provided with 440V Ac, 3-ph power supply through two different feeders.
These feeders are swappable whenever required depending upon the power availability.
DC power supply equipment
It converts the available AC power (440 V AC, 3-phase) into 48 V DC.
2 no of Switch Mode rectifier units that is SMPS based Power supply units designated as SMP-1 & SMP-2
Selection of SMPs and Battery can be done by using two switches provided on the front panel.
MDF equipment
All the subscriber lines and junction lines from the Exchange are terminated on one side and field cables on other side.
This facilitates the jumpering of any number to any location as per requirement and also to isolate Exchange side from the lie side to identity the fault.
[attachment=27664]
Overview Of Communication Systems in VSP:
In Visakhapatnam steel plant very wide range of communication systems are provided for meeting the day-to-day internal and external communication needs.
These communication needs are broadly classified as follows:
General-purpose communication systems.
Process communication systems
Monitoring and signaling systems.
General Purpose Communication Systems:
The following facilities are provided under category of communication and signaling systems.
4000 lines electronic exchange plant.
3000 lines electronic exchange in township.
128 lines electronic exchange in township .
AC incomer unit
The Exchange is provided with 440V Ac, 3-ph power supply through two different feeders.
These feeders are swappable whenever required depending upon the power availability.
DC power supply equipment
It converts the available AC power (440 V AC, 3-phase) into 48 V DC.
2 no of Switch Mode rectifier units that is SMPS based Power supply units designated as SMP-1 & SMP-2
Selection of SMPs and Battery can be done by using two switches provided on the front panel.
MDF equipment
All the subscriber lines and junction lines from the Exchange are terminated on one side and field cables on other side.
This facilitates the jumpering of any number to any location as per requirement and also to isolate Exchange side from the lie side to identity the fault.