1200 S. Rogers Circle, Unit 6, Boca Raton, FL 33487
Support: 561-282-5500
Office: 888-444-1111

CPaaS Services and Solutions Glossary of Terms

CPaaS stands for Communications Platform as a Service and it’s leading the way in the next evolution of VoIP services and solutions. This popular way of communicating is consistently being talked about by industry insiders as the way of the future. Here Call 48 provides a glossary of CPaaS terms so you can join the conversation with us.


10 Digit Long Code also known as commercial long codes, support the high-volume messaging throughput that businesses need to send out bulk messages. Most of the companies opt for 10DLC because of its capability of sending 100,000 text messages/month with a send rate of 15 messages/second. 10 DLC can be considered as an upgraded version of the A2P messaging.


Application Program Interfaces are a software intermediary that enables two software apps to interact with each other. At Call 48 APIs are integrated into our CPaaS enabled customer platform VoIP Portal, enabling data transmissions between two software applications.


Application-to-Person Messaging refers to text or multimedia messages that are sent by businesses to end-users. Unlike Person-to-Person messaging, A2P Messaging allows businesses to automate text messages for various purposes, such as sending promotional messages, appointment reminders, OTPs, or alerts.


Automatic Number Identification is a feature used by telephone service providers to track the number of a caller. This feature is also offered to businesses to help them identify who is calling them. The line type and the phone number of a calling party are recorded, even if the caller ID blocking is on.


Automatic Location Identification is an intelligent electronic location system that automatically displays a caller’s number and addresses when they call an emergency responder service such as fire departments or police departments. ALI makes it easier for emergency responders to locate the caller’s address quickly, regardless of landline or mobile origination.

Alphanumeric Sender ID

The alphanumeric sender ID technology enables a sender to set their business name as the Sender ID when sending one-way text messages to supported countries. Usually, the alphanumeric Sender IDs can be as long as 11 characters, and the accepted characters are a-z, A-Z, and 0-9. Alphanumeric Sender ID can significantly increase your SMS open rates.

Bulk SMS

Often enterprises trigger SMS to a large volume of customers in one go.

Call Masking

Call Masking refers to the technique of masking a telephone number to keep your personal number private. The same technique can also allow the parties to send SMS to each other without revealing their personal phone numbers.


Click-to-call refers to a type of digital communication in which a person clicks a button or text in order to be connected with another individual in real-time. These click-to-call links are commonly found as buttons on websites or mobile applications.


Click-to-Dial is a browser-based plugin that allows users to auto-dial any number with one click.


Communication Platform as a Service is provided by Call 48 through our backend customer platform called VoIP Portal.

Contact-Center-as-a-Service (CSaaS)

Contact Center as a Service is a customer experience solution that allows businesses to access all the separate components that make up a traditional contact center via any channel.

Concatenated SMS

Concatenated SMS enables you to send longer text messages without the content being split in a way that may confuse the recipient. Businesses use this method to overcome the limitation of the number of characters sent in a single SMS.


Contact center infrastructure consists of both software and hardware components that are required to run a contact center. This includes IVR units, automatic call distributors, cloud-telephony integration, and universal queue management.

Call Detail Record or CDR

Call detail records are used to capture details on calls made on telephone systems, including the name and the number of the caller, the name and number of the receiver, the date and time when the call was made, and the call duration. Call 48 CDRs help our customers generate bills and offer a detailed description of calls made.

Conversational AI

Conversational AI refers to technologies such as virtual assistants or chatbots, which end-users can interact with.

Delivery Report 

A delivery report or DLR is the notification you receive when the SMS sent from your number has been delivered successfully.

Flow Builder

Flow builders can create communications workflow for Voice, SMS, and Webhooks without a single line of code. It can be used for automating, prototyping, and connecting communications flows with your customers within minutes.

Global System for Mobile Communications 

GSM is a system of standardized protocols applicable for mobile devices using a 2G digital cellular network.

Home Location Registry 

Home Location Register is a database that contains various information related to mobile subscribers of a mobile network such as their mobile numbers, the services they have opted for, their number porting history, or any other similar information.

Interactive Voice Response 

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


An International Mobile Subscriber Identity is a unique number that identifies every user in a GSM and UMTS network.

Information and Communications Technology 

ICT can utilize internet, computer-based, or mobile-based technology to make communication services available to a wide range of users.


Multi-Factor Authentication is a security system that verifies a user’s identity by requiring multiple credentials. It is a vital component of identity and access management.


Mobile Virtual Network Operators are those organizations that offer mobile services but do not necessarily have the infrastructure that is required to provide mobile phone services.


Mobile Number Portability is a facility that allows mobile users to retain their phone numbers when they switch from one network operator to another, irrespective of the geographical location.


The Mobile Subscription Identification Number refers to the ten-digit unique number used by mobile network operators to Identify a mobile phone.

Mobile Terminated 

The term Mobile Terminated refers to an SMS message sent from a client application and delivered to the recipient’s mobile device, with the word terminated conveying that the messages are delivered to a specific mobile device.

Natural Language Processing

Natural language processing is a subfield of artificial intelligence that assists AI chatbots in understanding and processing human language.


Omnichannel selling offers a unified brand experience to customers irrespective of the channel they are on.

One Time Password 

An OTP is used to validate the authenticity of the user utilizing a one-time-password and expires after each session. The OTP can be purely numeric or alphanumeric.

Person to Application Messaging

Person-to-Application messaging is the process of sending messages from a mobile user to an application. The process requires the end-user to start the interaction with a business or company by sending an SMS to an application.

Person to Person Messaging 

Person-to-person messaging is defined as a two-way messaging conversation between two users via mobile phones or similar devices.

Premium SMS 

Sent to a short 3-7 digit number, Premium SMS is a relatively more expensive SMS service the end user pays to receive. Examples of Premium SMS include voting for a contestant, donating for charity, downloading games or ringtones, or subcribing to paid services like daily horoscope, news updates, etc.

Rich Communication Services

RCS is an upgrade of the text-focused SMS protocol. With RCS, businesses can also track conversions, click-through rates, and read receipts of the messages sent. It allows businesses to send multimedia files, locations, documents to make conversations more engaging.

Representational State Transfer API 

A REST API is a standardized and straightforward way for two applications to communicate via HTTP, similar to web browsers & servers. Businesses usually prefer this technology because of the flexibility it gives.

Sender ID

Businesses often subscribe to a unique number or name while sending text communication. This Sender ID is displayed in the “from” section of the customers’ inbox. It helps businesses create brand awareness and recall.

Session Initiation Protocol 

SIP is a signalling protocol that initiates, maintains and terminates multimedia sessions over the internet. Call 48 offers SIP services and solutions to wholesale and reseller customers with a private label option.

Short Message Peer-to-Peer Protocol 

Short Message Peer to Peer protocol or SMPP is a general standard laid down for SMS processes, regarding how large volumes of SMS can be sent in a very fast and reliable manner.


An SMS API is a well-defined software interface that enables code to send short messages via an SMS Gateway. SMS APIs are often used to bridge the gap between telecommunications carrier networks and the wider web.

Software-as-a-Service (SaaS)

SaaS is a software distribution model in which a third-party provider hosts applications and makes them available to customers over the Internet.

Short Message Service Center 

A short message service center is an element of a wireless network that manages messaging operations such as routing, storing, forwarding, converting, and delivering SMS messages.

Short Code

A Short Code is a 4-6 digit virtual number that enables the receiving and sending text or multimedia messages. They are usually used by businesses to let consumers opt-in to their marketing campaigns, notification services, or to enter SMS contests.


A Text-to-Speech (TTS) software converts written text into an audio format. It allows businesses to have a consistent voice across all platforms.

Two Factor Authentication 

Two-Factor Authentication, (also known as 2FA), is an extra layer of protection used to ensure the security of online accounts beyond just a username and password.

Universal Mobile Telecommunication Service 

The UMTS (Universal Mobile Telecommunication Service) is a 3G mobile cellular network system based on GSM (Global System for Mobile). It can transmit text, voice, video, and multimedia at data rates up to 2 Mbps.

Unified Communications as a Service (UCaaS)

Unified Communications as a Service refers to a cloud-based service offering that enables enterprise communications and instant collaboration across business locations. UCaaS solutions help enterprises stay connected with their stakeholders via text, instant message platforms, voice, or video conferencing channels.

Verified SMS 

Verified SMS is a feature of Google Messages that adds sender verification and branding to a business’ SMS program to make them safer and more trustworthy. This is a step taken by google to strengthen user privacy and security, and prevent spam.

Video API

A Video API makes it easy to build a custom video experience within any mobile, web, or desktop application, and is built on the WebRTC industry standard that is available on billions of devices.

Virtual Long Number

A Virtual Long Number (VLN) is a 12-digit mobile number that businesses use to send and receive SMS or voice calls from the public. It is often used for promotional and marketing activities.

Virtual Private Network 

Virtual Private Network (VPN) faciliates privacy for users by masking their IP addresses. It makes online activities untraceable and provides anonymity to the users. VPN is especially helpful when working from a public network.

Voice API

A voice API, or application programming interface, is a software connection that enables companies to embed the ability to make and receive voice calls into their applications and networks.

Voice over Long Term Evolution (VoLTE)

VoLTE is one of the most advanced technologies that the leading mobile network operators use to deliver high-quality voice calls. Voice conversations that happen via VoLTE will sound extremely clear with reduced background noise. Apart from voice quality, users can also enjoy certain benefits such as faster connection times and longer battery life.

Virtualized Network Function (VNF)

VNFs are virtualized tasks that were formerly managed by dedicated hardware. VNFs transports individual network functions from the hardware devices to software and operates on commodity hardware. VNF includes domain name systems, firewalls, or Network Address Translation, and most of the tasks can be operated via virtual machines.


WebRTC stands for Web Real-Time Communication. It enables real-time media communications like video, voice, and data transfer natively between browsers and devices, allowing users to communicate from within their primary web browser without the need for complicated plug-ins or additional hardware.