The document describes the layout and components of the HCTE Rawalpindi (C&C08) time division multiplexing exchange located in Satellite Town, Rawalpindi. It includes diagrams and descriptions of the server room, control room, switch room, and main modules. The C&C08 exchange uses time division multiplexing to support up to 800,000 subscriber lines across its racks, boards, cards, and interfaces that perform switching, processing, power distribution, synchronization, and other functions to enable telecommunications services.

1. 1
HCTE Rawalpindi (C&C08) Time division
multiplexing (TDM)
PTCL Exchange
Satellite town, Rawalpindi

2. 2
NGN Floor layout
Server Room
Control Room
Switch Room
Servers
4 U
Power Supply / UPS
Air-Conditioner
Air-Conditioner
Air-Conditioner
01
23456
7891011
DDFODFADM
HCTE C&C08
C4 Soft Switch
C5 Soft Switch

3. 3
Server Room Layout
Modem
Engineer
Virtual PCServer
Data center
PC
Chair
Air Conditioner
Air Conditioner
ServerPC
Chair
Ethernet
Engineer

4. 4
Control Room layout
ScannerPrinter
Laptop
PC
PC
PC
Router
PC
PC
PC
Telephone
ChairChair
ChairChair
Engineer

5. 5
NGN /HCTE Switch room Layout
4 U
Power Supply / UPS
Air-Conditioner
01
23456
7891011
DDFODFADM
HCTEC&C08
C4 Soft Switch
C5 Soft Switch
Air-Conditioner Air-Conditioner
Batteries Bank

6. 6
C&C08 Diagram

7. 7
C&C08 Description
 Vendors: C&C08
 Racks Alignment: 0 To 11
 Rack Profile:
• Rack#01 = 6 frames
• Rack 4-9 = 4 frames
• Missing 2,3,10, It is standard.
 Profile of C&C08
 Length: 2100 mm Width: 800 mm Depth: 550 mm
 Maximal Capacity : 800,000 subscriber lines or 180,000 DT
 Local, Tandem, Toll, International Exchanges
 Four Parts of C&C08 LAN Switch, Display ,Converter and Server.
 Eight HCTE in Bahawalpur, Multan, Lahore, Karachi, Gujranwala, Faisalabad,
Peshawar and Islamabad.

8. 8
Structure of Connectivity

9. 9
C&C08 Main Modules Description
 Front AM (FAM)
 It manage the inter SIM call connection and interfaces of
terminal system like ticket recording and traffic statistics.
 Back AM (BAM)
 It deals O&M open terminal network that is based on
TCP/IP protocol. It is stored all the databases and programs
also.
 Integrated GateWay for Billing (IGWB)
 It is used to save the billing data.

10. 10
C&C08 Main Modules Description
 Switching Module
 It is Independent Switching function, handles traffic intra
modules; provide various services interface; perform functions
like database management, call processing , maintenance and
operation.
 Remote Switching Module
 Same as SM, difference is that SM links through 40 meter optical
interface while RSM has standard E1 interface and may use SDH,
especially STM-1.

11. 11
Main Logical Module In C&C08
 Service Processing Module
 Connected with BAM directly using 10/100Mbs
TCP/IP interface and works with the interface of SDH
(STM-1) and E1 to provide interfaces of trunks and
AM.
 Shared Resources Module
 It provides DTMF devices, Signal Tones, Conference
telephone device and CID display device required by
all the SPMs in the whole office.

12. 12
Main Logical Module In C&C08
 ClocK Module (CKM)
 Communication Control Module (CCM)
 Central Processing Module(CPM)
 Line Interface Module (LIM)
 Media Highway Interface (MHI)
 Communication Module (CM)
 Communication Network Unit (CNU)
 Switching Network Unit (SNU)

13. 13
Hardware Description
 ET16 (Electrical Transmission )
 It is electrical Interface. It provide 16 E1s.
 Synchronous Transfer Unit (STU)
 It is optical interface. It provide Synchronous Transfer Module
(STM-1 ( 63 E1s)).
 QSI
 It is used for internal Communication. It collect data from ET16 and STU,
communicate in the switch(HCTE C&C08)
 PoWer Controller (PWC)
 It provide DC power to semi frame. There are two PWC boards are used in
the frame. It give 5,12,24 and 48 Volts to different boards.

14. 14
Hardware Description
 Media Highway Interface(MHI)
 It is used as bus to deliver control signal in the whole
switch(HCTE C&C08).
 Communication Module (CM)
 It is main module which control the exchange. It is further
divided into two section.
 CNU
 It is communication/control Network Unit.
 SNU
 It is switching network unit.
 ALarm Module(ALM)
 It generate alarm.

15. 15
Hardware Description
 Central Processing Card(CPC)
 It is used to provide signaling Links. One card can provide four signal
link. One signal Link can handle 4096 channels.
 Service Processing Card (SPC)
 It is main card of SPM. It is used in pair master and slave. It can
configure 128 E1’s.
 SPD
 It is main card of SRM. It provide DTMF(Dual Tone Multi Frequency).
 Bus DriveR(BDR)
 It provide buses for communication of signals.

16. 16
Hardware Description
 SPT
 It is also part of SRM. It provide announcements.
 ClocK Synchronization(CKS)
 It generate clock pulse. It is part of CKM.
 ClocK Digital(CKD)
 It is used to synchronize the clock in E1s as time slot-0.
 Fast Switching Network(FSN)
 It is used for Switching Purpose.
 PWX ( Power Distributor)
 It is used to distribute/Control the power.

17. 17
Hardware Description
 Back Address Controller(BAC)
 It is used as communication controller. It is main
board of CCM.
 Analog Subscriber Line(ASL)
 It is subscriber Card. It’s capacity of 16 subscribers.
 Remote Switching Processor(RSP)
 It’s main function to communicate between SM and
LIM Frame (ET16 card).

18. 18
Prepared by:
Hafiz Shehbaz Ali
For any query Contact:
+923136585701
Email:
Shehbaz.bsee1395@iiu.edu.pk
International Islamic University
Islamabad
Supervised by:
Engr. Khalid Sarwar
Contact:
+923135003545
PTCL Satellite Town
Rawalpindi