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.
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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.
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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.
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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.
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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)
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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.
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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.
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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.
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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.
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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).
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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