In an underground urban railway system, the efficient and reliable operation of the telecommunications is of paramount importance to the operation of the entire Metro system. Even though there are acceptable telecommunications systems for a wide range of application, only those systems that fulfill the highest standards of manufacture and the special requirements concerning the operation of the railway and the associated installations are suitable to be used in the Metro Base Project.
Moreover, the appropriate provisions have been made during the design and installation of the equipment in the extensions of lines 2 and 3, so that these systems are fully compatible with the already operating systems of the Base Project.
|Automatic Telephone System||It consists of a telephone exchange system, whereto PRIMARY-ISDN type lines are connected, serving the wire communications needs.|
|Direct Telephone Line Personnel||Telephone sets for:|
Communication is cases of emergency and Maintenance
Traction Power Removal devices
|Direct Telephone Line||Telephone sets installed on the platforms|
Wireless TETRA system:
Closed Circuit TV (CCTV)
Cameras in the Concourse and Platform areas, as well as in the Cash Counting Room
|Public Address System (PA)|