Page 247 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Note:Factory resetting an Android device is very different from rebooting one. Learn more about reboot
vs reset to see which option is best for you.

Overview of BTS,MTS:
BTS: BTS(Base Transceiver Station) and MTS (Mobile Telephone Switching Office) are key components in cellular
networks, facilitating communication between mobile devices and the wider telecommunications infrastructure.
Here’s an overview of each:
BTS (Base Transceiver Station):
Function: The BTS is a critical component of the radio access network (RAN) in cellular networks. Its primary
function is to transmit and receive radio signals to and from mobile devices within its coverage area.
Transmission: The BTS communicates with mobile devices via radio waves using various frequency bands
allocated for cellular communication. It transmits voice, data, and control signals to mobile devices and receives
signals from them.
Coverage Area: Each BTS covers a specific geographical area, often referred to as a cell. Multiple BTSs are
strategically deployed to provide coverage across a wider area, forming a cellular network.
Components: The BTS consists of various components, including transceivers, antennas, amplifiers, power
supplies, and control units. These components work together to ensure reliable communication between mobile
devices and the network.

Connection to Network Core: The BTS is connected to the mobile switching center (MSC) or base station
controller (BSC) in the network core through backhaul links, such as optical fibers or microwave links. This
connection facilitates the routing of calls and data between mobile devices and the wider telecommunications
network.
MTS (Mobile Telephone Switching Office):

Function: The MTS, also known as the mobile switching center (MSC), is a central component of the core
network in cellular networks. Its primary function is to route calls and data between mobile devices within the
network and external networks, such as the public switched telephone network (PSTN) and the internet.
Call Routing: When a call is initiated from a mobile device, the MTS routes the call to the destination device
or network based on the dialed number and other routing information. It manages call setup, teardown, and
handovers between different cells and BTSs.
Data Routing: In addition to voice calls, the MTS also handles the routing of data traffic, including SMS (Short
Message Service), MMS (Multimedia Messaging Service), and packet data for internet access.
Subscriber Management: The MTS maintains subscriber databases containing information about registered
mobile devices, subscriber profiles, service subscriptions, and billing information. It ensures accurate billing and
subscriber authentication for network access.
Interconnection: The MTS establishes and manages connections with other MSCs, PSTN switches, and external
networks to facilitate inter-network communication and roaming services for mobile subscribers.
In summary, BTSs and MTSs are essential components of cellular networks, enabling communication between
mobile devices and the wider telecommunications infrastructure. While BTSs handle radio transmission and
reception at the cell level, MTSs manage call routing, data traffic, and subscriber management at the core network
level.

Testing various parts and components used in mobile phones is an essential aspect of hardware repair
Here’s an overview of common parts and components and how they can be tested:
Battery: Check battery health using diagnostic tools or built-in battery health features on the phone. Measure
battery voltage using a multimeter to ensure it’s within the expected range.
Test battery capacity by discharging and recharging it fully and measuring the time it takes to deplete.
Display (LCD/AMOLED): Visually inspect the display for any physical damage, dead pixels, or discoloration. Test
touch functionality by swiping and tapping across the screen.

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CITS : E & H - Electronics Mechanic - Lesson 130 - 145