---
title: SigmaVoIP replaces Cisco UC300 series with Grandstream's UCM series
description: SigmaVoIP replaces their Cisco UC300s with Grandstream's UCM series of IP PBXs
---

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# Find out why SigmaVoIP Replaced Cisco PBXs with Grandstream's UCM series

![ucm_logo_new.png](https://content.grandstream.com/hubfs/ucm_logo_new.png)

#### SigmaVoIP replaces Cisco UC300 series with Grandstream's UCM6100 series

 

SigmaVoIP, a leading VoIP installer in the United States, replaced Cisco's UC300 Series with Grandstream’s UCM series of IP PBX Appliances for all customers. Download the case study to learn why.

Fill out the form to the left to download the case study.

### Download here...

#### About Us

Grandstream Networks, Inc. has been connecting the world since 2002 with SIP Unified Communications solutions, making businesses more productive than ever before. Our award-winning solutions serve SMBs and enterprises markets and we’ve been recognized throughout the world for our quality, reliability and innovation.

[Learn More](https://www.grandstream.com/company/about-grandstream)

#### Contact Us

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