2020年11月23日 · A PBX allows employees to make internal calls via extensions. For making and receiving external calls, users access an outside line connected to the public switched telephone network (PSTN). The PBX provides more automated features than a KSU. For instance, the PBX includes automatic routing for incoming calls.

2021年6月10日 · PBX is an acronym for private branch exchange, and PABX is an acronym for private automatic branch exchange. Both systems differ from a KSU system in that they allow for call switching while actually on the phone, while a KSU will only allow for redirection to a central calling hub or operator system (PTSN Exchange.)

2023年3月10日 · Private Branch Exchange (PBX) phone systems provide more advanced functionality for larger businesses. They usually come standard with features such as conferencing, auto attendant, music on hold and dial-by-name directories. PBX phone systems rely on telephone hardware and switches to route calls.

Comparing business phone systems starts with understanding the three principal types; KSU, PBX and VoIP. KSUs (Key Service Unit) are uncomplicated, multi-line on-premise digital business telephone systems used by smaller organizations. They have been in use for decades and employ proprietary technology and match with specific proprietary ...

商务电话系统主要有三种类型，每种类型都旨在满足不同的通信需求：关键系统单元 (ksu)、专用交换机 (pbx) 和互联网协议语音 (voip)。 每种系统都提供独特的特性和功能，以满足不同的需求 business 要求。

2025年3月6日 · On-premises private branch exchange (PBX) phone systems offer more advanced functionality than a KSU. They often include features like conferencing, auto attendant, music on hold, and dial-by-name directories. Unlike a KSU system, you can install a single PBX system to cover numerous business locations or regulate more lines than a KSU can manage.

2024年7月7日 · Business phones include Key System Units (KSU), Private Branch Exchange (PBX), and Voice over Internet Protocol (VoIP) systems. KSU systems are suitable for smaller businesses, while PBX systems cater to larger organizations needing advanced call management.

2022年6月17日 · Here are the core differences between a key system and a PBX system. A key system or key service unit (KSU) is a simple multi-line telephone system ideal for small businesses with fewer than 50 employees. KSU handsets have multiple buttons representing individual lines, with users picking up the receiver and pressing a button to access the line.

2025年3月6日 · A private branch exchange, or PBX telephone system, provides a slightly more modern alternative to KSU. It might help to think of PBX business phone systems as being operated and monitored via a switchboard, which receives, processes, and routes calls according to configurable paths.

When it comes to business phone systems, small businesses can choose among three basic types: key phone system, private branch exchange (PBX), and Voice over Internet Protocol (VoIP). In this blog, we'll discuss each type and their respective pros and cons so you can decide which business phone system is best for your company.