Glossary of terms | Department of Telecom eServices Portal
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A B C D E F G H I K L M N O P Q R S T U V W
Telecom Cyber Security

shall have the same meaning as specified in the Telecommunications (Telecom Cyber Security) Rules, 2024;

Telemarketer

Registered Telemarketer means any Sender of commercial communication who is registered for the purpose of telemarketing with the access provider(s).

Telemarketer Codes

Allocation of access codes (prefixed numbering series) to Telemarketer for dialing out as its allicated code

Terminal equipment
A device that constitutes a point of termination of a communications circuit or channel.Terminal equipment includes all customer premises equipment (CPE), including voice terminal equipment and data terminal equipment (DTE)
TRAI

means Telecom Regulatory Authority of India constituted under the TRAI Act;

TRAI
Telecom Regulatory Authority of India
Trai Act

means Telecom Regulatory Authority of India Act, 1997 (24 of 1997);

TSP
Telecom Service Providers (TSPs) 
TSTP

Test Schedule Test Procedure (TSTP) for Roll Out Obligation

UASL
Unified Access Services License - The UASL services cover collection, carriage, transmission and delivery of voice and/or non-voice messages over licensee’s network in the designated service area and include provision of all types of access services. Access Service Provider can also provide Internet Telephony, Internet Services and Broadband Services. If required, access service provider can use the network of NLD/ILD service licensee.The access service includes but not limited to wireline and / or wireless and fixed wireless access.
UL
Unified License - The Licensee may establish, operate and maintain Telecommunication Networks and telecommunication services using any technology as per prescribed standards in the service area as per scope of services authorized under this License. In case, the Licensee obtains Access Spectrum, the terms and conditions of the allotment of spectrum regarding use of technology shall be applicable.
UL License
Unified License (UL)
UL-VNO
Unified License for Network Operator (UL-VNO)
UMS services

Unified Media Services

Updating Of Telecommunication Services

means the process of replacing or upgrading an existing SIM or telecommunication services, or changing the details of the user, without any change to the unique telecommunication identifier assigned to such user;

User Terminal (Ut)

or “user equipment (UE)” means a type of telecommunication equipment used by a user to avail telecommunication service provided by an authorised entity;

USO
Universal Service Obligation - NTP’99 provided that the resources for meeting the USO would be raised through a ‘Universal Access Levy (UAL)’, which would be a percentage of the revenue earned by the operators under various licenses.
USR

UHF Handheld Radio (USR) and License is issued by RLOs

UTM

Unregistered Telemarketer" (UTM) means any Sender of commercial communication who is not registered for the purpose of telemarketing with the access provider(s)

Value added services
Value-added service (VAS) is a popular telecommunications industry term for non-core services, or in short, all services beyond standard voice calls and fax transmissions. In the telecommunication industry, on a conceptual level, valueadded services add value to the standard service
VAS
Testing of Value Added Services (VAS)
Virtual Network Operator

or “VNO” means an authorised entity or licensee providing telecommunication service by entering into mutual agreement with a parent NSO which may provide for:

VNO
Virtual Network Operator
VSAT

means Very Small Aperture Terminal.

VSAT
Very Small Aperture Terminal - VSAT License is to establish, install, operate and maintain VSAT Closed Users Group Domestic Data Network service via INSAT Satellite System on non- exclusive basis within territorial boundary of
VSAT-CUG
VSAT CUG Service (Satellite based)
WANI
Wi-Fi Access Network Interface
WEP

WEP (Wired Equivalent Privacy) was first security solutions for WLANs that employed encryption

WFD
Wireless Finance Division of DoT
WHO
World Health Organisation