Phone Systems

Michigan Phone Systems

Detroit IT has been Michigan’s leading business telephone system company since 1997. We specialize in a full range of business telephone solutions including on-premise phone systems, hosted VoIP phone systems and hybrid phone systems. Our portfolio includes several business telephone systems which enables us to approach our client engagements in an unbiased manner allowing us to be true business phone consultants.

Managed VOIP Services

Whether you are in need of a new phone system or repair services for your existing phone system Detroit IT can help. We provide business telephone support to some of Michigan’s most prominent businesses. Our services include:

  • Hosted VoIP Solutions
  • Unified Communications (UC)
  • Unified Messaging (UM)
  • Collaboration & Video Conferencing
  • Multi Site VoIP
  • Mobility
  • Call Centers & CRM Integration
  • Carrier Services (MPLS, T1, PRI, SIP, etc.)

Voice Over Internet Protocol (VOIP) Types


Hosted PBX
Hosted PBX or hosted VoIP, otherwise known as an Internet phone system is one where the provider is responsible for housing the IP-PBX as well as handling the technology required to provide the services to the phone system. The desk sets will plug into a router and the calls, signaling, and features are handled through an IP-PBX server at the provider’s location.
On-Premise PBX
On-premise PBX is also known as an IP-PBX phone system. It is similar to a traditional PBX system that resides at a location, such as a computer equipment room or phone closet. The main difference is that IP routing is done with more current technology. The signaling is done with an IP phone to the IP-PBX server using a LAN. Calls can go through a traditional phone company as well as voice over Internet (VoIP) using SIP trunking. Gateway cards are used to connect the system to the traditional phone company provider.



  • Digium 
  • Avaya
  • Mitel
  • ShoreTel
  • 8×8
  • Vonage


  • Digium
  • Avaya
  • Mitel
  • ShoreTel
  • Toshiba
  • Cisco
  • Panasonic


Phone System Types

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