ETCE-D - Digital Telephone Exchange
- The ETCE-D is a special digital telephone exchange dedicated to electric power communications network and it:
- offers all advantages of modern technology,
- keeps all good characteristics of analog exchanges and
- is compatible with existing network. ETCE-D has the characteristics of local, transit, PABX and manual exchange.
About ETCE-D
The ETCE-D is fourth type (first digital) of exchanges developed in IRITEL and dedicated to telephone network (TN) of electric power industry (EPI).
ETCE-D is developed according to Technical requirements of TN EPI and according to ITU-T recommendations for digital exchanges. It consists of the following parts: switching network, line circuits, network interfaces, peripheral processor units, central processor unit, operator console and set for emergency operation.
Switching network is non-blocking digital network for switching channels with rate 64kb/s. Line circuits provide all BORSCHT functions.
ETCE-D Properties
- Switching network is non-blocking digital network for switching channels with rate 64kb/s.
- Line circuits provide all BORSCHT functions.
- There are two types of digital network interfaces. One is standard A interface and the other is codirectional 64 kb/s interface according to ITU-T Rec. G.703.1.
- There is one analog interface dedicated to operation in period of digitalization.
- The peripheral processor unit controls a number of lines and/or network interfaces.
- The central processor unit controls all peripheral processor units and operator set.
- The main trunks may be monitored and managed by the operator set.
- The functions of PABX are provided by the operator set.
- The set for emergency operation makes possible to establish some most important connections during exchange failure.
- Main characteristics of ETCE-D are high availability, adaptable numbering system, fast and adaptable network signaling system, fast operator set, set for emergency operation, remote monitoring.
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