Glossary of terms | Department of Telecom eServices Portal
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CA

Chartered Accountant

Cable Landing Station

or “CLS” means the station where fibers of the international or domestic submarine cable gets terminated and it houses the Submarine Line Terminating Equipment (SLTE) and Power Feeding Equipment (PFE);

Cable Landing Station-Point Of Presence

or “CLS-PoP” means a type of CLS, where some fiber pairs of the submarine cable extended from the CLS are terminated and it houses SLTE;

Call

means a connection established by means of telecommunication that enables voice communication;

Call Charges
Call charges are variable and are used to pay for the cost of the equipment to route a call from the caller's exchange to the recipient's exchange.
Calling Line Identification

or “CLI” means the identity of the calling or originating user in terms of the telecommunication identifier assigned or any other identification as may be specified by the Central Government from time to time;

CAPEX
Capital Expenditure
Captive Non-Public Network

or “CNPN” means a terrestrial wireless telecommunication network established for captive use within a specified geographical area, which cannot be used for providing commercial or public telecommunication services to users.

Captive Telecommunication Services

means captive telecommunication services as identified and authorised under the Telecommunications (Authorisation For Provision of Captive Telecommunication Services) Rules, 2025;

Carrier Service
Provision of wired or wireless facilities to originate, terminate or transit calls, charging for interconnection, settlement or termination of domestic or international calls, charging for jointly used facilities including pole attachments, charging for the exclusive use of circuits, a leased circuit or a dedicated link including a speech circuit, data circuit or a telegraph circuit
CBuD

Call Before you dig portal

CCA
Controller of Telecom Accounts field unit of finance unit of DoT.
CDMA
Code Division Multiple Access (CDMA) is a technology for providing wireless services.
CDoT
Centre for Development of Telematics
Chief Telecommunication Security Officer

means the Chief Telecommunication Security Officer appointed under rule 6 of the Telecommunications (Telecom Cyber Security) Rules, 2024;

Cloud-Hosted Telecommunication Network

or “CTN” shall have the same meaning as provided in the Telecommunications (Authorisation for Telecommunication Network) Rules, 2025.

Cloud-Hosted Telecommunication Network (Ctn) Provider

shall have the same meaning as provided in the Telecommunications (Authorisation for Telecommunication Network) Rules, 2025.

CMRTS
Captive Mobile Radio Trunking Service CMRTS
CMTS
Cellular Mobile Telephone Service - It is a type of short-wave analog or digital telecommunication service in which a subscriber has a wireless connection from a mobile phone to a relatively nearby transmitter. The transmitter's span of coverage is called a cell. As the cellular telephone user moves from one cell or area of coverage to another, the telephone is effectively passed on to the local cell transmitter.
CNPN
Captive Non-Public Networks CNPN
Companies Act

means the Companies Act, 1956 or the Companies Act, 2013, as the case may be;

Control

includes the right to appoint majority of the directors or to control the management or policy decisions exercisable by a person or persons acting individually or in concert, directly or indirectly, including by virtue of their shareholding or management rights or shareholder’s agreements or voting agreements or in any other manner:

Core Telecommunication Network

means a system or series of systems of telecommunication equipment that is responsible for routing and controlling flow of telecommunication traffic among different parts of the telecommunication network and handles a range of essential functions including connectivity, routing, mobility management, authentication, authorisation, user management, policy management, management of exposure of the telecommunication network and servicing of Application Program Interfaces (APIs).

Critical Telecommunication Infrastructure

means any telecommunication network, or part thereof, notified under sub-section (3) of section 22 of the Act;

CRS

Community Radio Station (CRS)-Community stations serve geographic communities and communities of interest. They broadcast content that is popular and relevant to a local, specific audience. Community radio is a radio service offering a third model of radio broadcasting in addition to commercial and public broadcasting.

CS
Carrier Service
Customer Application Form

or “CAF” means the form as may be specified by the Central Government, for recording the user information for the purpose of providing telecommunication services;