Everything you want to know about Cloud Telephony

Cloud telephony has become a modern and flexible alternative to traditional telephone systems. Whether you're setting up business communications or upgrading your existing infrastructure, understanding the key terms is essential. This glossary gives you a structured overview of the most important concepts, technologies, and features related to internet-based telephony.

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Cloud Telephone System

What is a cloud phone system and what technologies power it? This section provides an introduction to the basics of IP-based telephony and explains key technical terms that are relevant when setting up and using a cloud phone system.

a/b Interface Asymmetric Digital Subscriber Line (ADSL) Broadband Internet Connection Busy Lamp Field (BLF) Carrier Point-to-Point (CP2P) Connection Cloud Direct Data Link (DDL) Download speed Dynamic Circuit Network (DCN) eFax: Send faxes over the internet Gateways HD telephony Internet Connection Internet telephony IP address IP-Centrex IP DECT IP Multimedia Subsystem (IMS) IP phone Migration National & international phone numbers P2P (Point-to-Point Connection) Quality of Service (QoS) Real-time Transport Protocol (RTP) Request for Comments (RFC) SDSL / SHDSL Session Initiation Protocol (SIP) SIP-Trunk Softphones Source based call forwarding TCP/IP Telecommuting Telephony Application Programming Interface (TAPI) The Ultimate Questionnaire for Choosing a Cloud Telephony Service Provider Virtual fax machine Voice over Internet Protocol (VoIP)

Call Management

Effective call management is essential for delivering professional customer service. From call routing and queuing to voicemail and conferencing, this area explains the building blocks of professional call handling.

Address Book Asynchronous Transfer Mode (ATM) Callback Call blocking Call handling Call history Calling Line Identification Presentation (CLIP) Calling Line Identification Restriction (CLIR) Call management Call pick up Call profile Call queueing Call routing Call Waiting Function Completion of Calls to Busy Subscriber (CCBS) Conference call Conference function Dial plan Direct Calling Holding calls Interactive Voice Response (IVR) Music on hold Simultaneous ring Soundstation Telephone number block Telephone operator workstation Toggling Unified Messaging System Voice encryption Voicemail Voice portals

Features

Cloud phone systems offer much more than just voice calls. Here you will find helpful features such as plug & play, fax-to-mail, and speed dial explained, all designed to simplify your daily work routine.

Advanced Audio Distribution Profile (A2DP) Answering machine AT commands Audio compression CCNR Fallback Fax2Mail Intercom Key assignment Keypad expansion Multiphone function Multiplex connections Plug & Play Redial button Software as a Service (SaaS) Sound waves Speed Dial Button Telephone number portability TPS Uninterruptible Power Supply Upload speed Wideband Audio

Data Security

Data security plays a central role in IP telephony. In the following, you will find the most important terms and technologies related to encryption, data protection, and security standards in cloud communication.

Advanced Encryption Standard (AES) Data encryption Data Privacy: How Secure Are Cloud Communications Services? Firewall Firmware Key-length Security certifications Servers WPA2

Customer Management

Modern phone systems can often be integrated with CRM platforms and offer tools for customer management. This section provides an overview of the key terms in this area.

Agent Call Center Monitoring Call centre Customer Relationship Management (CRM) Premium rate numbers

Telephone Systems

What telephone systems are actually available and how do they differ? In the following, we explain the different system types, including their typical areas of application.

Analogue telephone lines Dedicated line Hosted PBX Hybrid telephone system Private Automatic Branch Exchange (PABX) Private Branch Exchange (PBX) TC systems Telephone Connection Telephone provider

Wireless Communication

Learn more about wireless communication methods used in cloud telephony environments. This includes technologies like DECT, Bluetooth, and other cordless options for flexible setups.

Bandwidth Bluetooth Cordless telephony DECT Multi Cell DECT SBC Codec Single Cell DECT

Telecommunications Billing

This area explains how billing works in cloud and traditional telecom services. From flat rates to itemized billing, it covers the key concepts that help businesses manage expenses.

Billing units Cheap phone calls: 3 cost-efficient opportunities Flat rate Itemised billing

Telecommunications Network

For IP telephony to work, stable networks are necessary. This section explains how telephone networks are structured, from ISDN and PSTN to mobile networks and VPNs.

Fixed-line network Integrated Services Digital Network (ISDN) ISDN private branch exchange line group Mobile phone network Primary Rate Interface (PRI) Public Switched Telephone Network (PSTN) S0 bus SP2P Telecommunication networks Virtual Private Network (VPN) XCAPI

Routing

Routing determines how calls are forwarded within a network or company. Here you will learn more about important terms and procedures in the routing of voice data.

Inbound Least Cost Routing Outbound Routing

Connection Technology

Various technical processes are also used to create connections. Below you will find brief explanations of methods such as pulse dialing and SDH.

Pulse dialing Synchronous Digital Hierarchy (SDH) TAE Socket