""Dialer Topics""

What is DID-(Direct inward dialing)?

Direct inward dialing numbers (DIDs) are virtual numbers that allow you to route calls to your existing telephone lines. DIDs were developed in order to be able to assign certain employees a direct number, without requiring multiple physical phone lines.

A virtual number, also known as direct inward dialing or access numbers is a telephone number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP
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What is TFN-(Toll Free Number)?

Toll-free numbers are telephone numbers with distinct three-digit codes that can be dialed from landlines with no charge to the person placing the call. Such numbers allow callers to reach businesses and/or individuals out of the area without being charged a long-distance fee for the call.

A toll-free telephone number or free phone number is a telephone number that is billed for all arriving calls instead of incurring charges to the originating telephone subscriber. For the calling party, a call to a toll-free number from a landline is free of charge
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What is IVR-(Interactive voice response)?

Interactive Voice Response (IVR) is an automated telephony system that interacts with callers,gathers information and routes calls to the appropriate recipients.

Interactive voice response is a technology that allows a computer to interact with humans through the use of voice and DTMF tones input via a keypad.

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What is SIP-(Session Initiation Protocol)?

The Session Initiation Protocol is a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications.
SIP (Session Initiation Protocol) is a signaling protocol used to establish a “session” between 2 or more participants, modify that session, and eventually terminate that session. It has found its MAJOR use in the world of IP Telephony. The fact that SIP is an open standard has sparked enormous interest in the telephony market, and manufacturers shipping SIP-based phones have seen tremendous growth in this sector.

SIP clients typically use TCP or UDP on port numbers 5060 or 5061 for SIP traffic to servers and other endpoints. Port 5060 is commonly used for non-encrypted signaling traffic whereas port 5061 is typically used for traffic encrypted with Transport Layer Security (TLS).

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