How To | Make VOIP calls without a SIP server in Q-SYS

Learn to make Voice-over-Internet Protocol (VOIP) calls without the need for a Session Initiation Protocol (SIP) server, by using Q-SYS.

Updated at June 8th, 2023

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Table of Contents


The Q-SYS Softphone not only gives you the ability to connect to a Voice-over-IP telephone system (IP-PBX), you can also use the Softphone component in an unregistered mode, which allows making calls and connecting to other Q-SYS Softphones within the same Q-SYS Core processor. QSC uses Q-SYS software to implement the Softphones without any special telephony hardware, allowing multiple Softphone instances to run simultaneously on a single Core. The maximum number of Softphones that can be placed in a design is: Core 110f = 4; all other Cores = 64.

Below is a very simple illustration of how you can set up VOIP communication between 4 physical zones using a single (centralized) Core 110f without any special telephony hardware. Remember, there are a number of other ways to achieve this based on your requirements.

  • Softphone Control (Dial Pad) – Touch Controller (TSC) used for Zone Audio Control
  • Softphone Audio Input – Microphones used for Zone Audio Reinforcement 
  • Softphone Audio Output – Speakers / Amplifiers used for Zone Audio Reinforcement