About coral telecommunication and study of all exchange in coral telecommunication.

2. • Owner – Mr. Rajesh Tulli
• Coral telecom is established in 1996.
• Coral telecom in now days covers full range of communication need.
• It is an ISO Certified company & exports its product to 14 countries.

5. EPABX
(Electronic Private Automatic Branch
Exchange)
• Multi-line connection
• Switching system for calls
• 10000 subscribers can be
accommodated.

6. Digital Exchange
• Uses PCM & TDM technology.

7. Types of Exchanges
• SBDX
• DX2000
• IRIS lite
• MUX (IRIS)
• RIDAX

8. SBDX
• SBDX:- Small business digital exchange
• Digital ISDN designed for application of
small business.
• Support 8 & 12 ports.

9. DX 2000
• DX:- Digital Exchange
• Supports up to 504 lines.
• Highly versatile.
• Small range exchange.

10. Model of DX 2000 Series
• Mini – max. of 40 ports.
• Medium – max. of 72 ports.
• Large – max. of 120 ports.
• XL – max. of 248 ports.
• XXL – max. of 376 ports.
• SL – max. of 504 ports.

11. Mini & Medium
• Mini (40 ports)
• Medium(72 ports)

12. Large
• Large 120 ports

13. XL
• Extra Large (248 ports)

14. XXL
• Extra Extra large (376 ports)

15. SL
• 504 ports

16. Cards of DX Series
•PSU Cards
•CPU Cards
•Subscriber line card
•Share service card
•Trunk line card

17. PSU Cards
• 28 V & 48 V
• It can handle 240 V AC input.
• It can support up to 248 ports

18. CPU cards
The system is based on distributed processor
architecture.
Each peripheral card has its own processor.
CPU has three types:
• CCPU – 120 ports
• DXTCPU – 256 ports
• SLCPU – up to 512 ports

19. Subscriber line card
•Line subscriber card
•Digital line card
•ATD card
•DTD card
•GSM card

20. 1. Line Subscriber Card
• It is an 8 port card used for connecting normal PBT (Push button Phone).

21. 2. Digital line card
• DLC is an 8 port card for connecting KTS (Key
telephonic system).

22. 3. ATD card
• Analog Trunk Dialling card.
• It is an 8 port card.
• First 4 ports for Digital lines & next for trunk lines.

23. 4. DTD card
• Digital Trunk Dialling card.
• It is an 8 port card.
• First 4 port for trunk & 2 , 2 for digital & analog lines.

24. 5. GSM card
• Global system for mobile communication.
• It is an 8 port card.
• Can handle 8 SIM at a time.

25. Share service cards
• E1/ PRI cards
• VSN Card

26. 1. E1/PRI card
• Used to connect two exchanges.
• It supports 32 ports.
• Use Master/Slave configuration.

27. 2. VSN card
• Voice services cards
• Used for the calling services etc.
• 8 port card
• Can record 8 messages.

28. Trunk cards
• Trunk cards are used to connect
other exchange lines like BSNL,
reliance etc.
• It does not occupy any fixed
position in the cabinet.
• It is attached to CPU in DX2000.
• It is an 8 port card.

29. IRIS IVDX lite
• It can support up to 2000 ports.
• support GSM & CDMA cards.
• Small in size.
• 32 port line card is used.
• Two CPU & PSU are used.

30. MUX (IRIS IVDX)
• It can support up to 8000 ports.
• Used in railways.
• Support GSM & CDMA cards.
• Large in size.

31. RIDAX
• Used for military
purposes.
• Highly secured.
• Can work in fire, water,
snow & unbreakable.
• Magneto trunk cards
are used.

32. REFRENCES
• www.google.com.
• www.coraltele.com