Cisco
Cisco has been a leader in the PBX market for decades and is still one of the most popular choices for businesses. They offer a wide range of PBX options, including cloud-based services, self-managed systems, etc.
2. Avaya
The Avaya brand is also one of the most famous names for telecommunication equipment and networking solutions.
3. Panasonic
Panasonic provides a wide range of telephony solutions for businesses, including IP phones, voice mail systems and other communication devices.
4. Mitel
Mitel Networks Corporation offers a wide range of products like VoIP phones, PBX systems, unified messaging platforms, etc., which are highly reliable and easy-to-use communication tools!
5. Nortel Networks
Nortel Networks is an established brand for providing high-quality business PBX systems. The Nortel brand has been recognized as a leader in telecommunications equipment.