What is subscriber trunk Dialling telephone facility?

What is subscriber trunk Dialling telephone facility?

Subscriber Trunk Dialling( STD) also known as Subscriber toll dialling is a telephone system which allows subscribers to make long distance calls without the assistance of an operator. It is useful as it can be dialled directly without taking any help from operators.

What is Subscriber toll dialing?

Subscriber trunk dialling (STD), also known as subscriber toll dialing, is a telephone numbering plan feature and telecommunications technology for the dialing of trunk calls by telephone subscribers without the assistance from switchboard operators.

What is DTMF in telecom?

DTMF, or Dual-Tone Multi-Frequency tones, are in-band telecommunications signals sent over voice frequencies. Commonly used over telephone lines, DTMF tones are also commonly called Touch Tones.

How does a trunk call work?

In telecommunications, trunking is a technology for providing network access to multiple clients simultaneously by sharing a set of circuits, carriers, channels, or frequencies, instead of providing individual circuits or channels for each client.

What is full form of PCO?

A public call office (PCO) is a telephone facility located in a public place in India and Pakistan.

What do you mean by trunk calls?

: a long-distance telephone call for which the caller must pay an extra amount of money.

How DTMF is send in VoIP?

DTMF (Dual Tone Multi-frequency) are signals/tones that are sent when you press a telephone’s touch keys. These tones (or data signals) are used to access voicemail (passwords) and navigate IVRs or attendants for large companies like banks.

What is pulse and tone dialing?

Pulse dialing indicates each digit in the phone number by a series of clicks that corresponds only to that digit. It would then need a short pause in order to clearly identify one digit from the next. Tone dialing, also called as Dual Tone Multi Frequency, uses different tones to indicate a different number.

What is a trunk called?

— called also bole. b(1) : the human or animal body apart from the head, neck, and appendages : torso.

What does a trunk line mean?

Definition of trunk line 1 : a transportation system (such as an airline, railroad, or highway) handling long-distance through traffic. 2a : a main supply channel (as for gas or oil)