XLR SIP Codec ‘Zero’


As seen on forbes.com & Radio World.

Ships from:
United Kingdom


Receive SIP calls for remote radio shows, media tours and podcast interviews, with this simple IP codec. Just connect to an audio mixer with mix-minus configured. It can also be used with a microphone* and headphones.

* Note: The mic pre-amp may not be suitable for some dynamic or low-sensitivity microphones, or for high performance applications.

The XLR SIP Codec from In:Quality connects to your existing internet connection and allows you to receive calls in full studio quality, thanks to its use of the Opus codec.  It can be shipped pre-configured with your own unique sip.audio address, and also can function as a phone hybrid, without needing a physical line. Simply plug it in, and wait for a call.

The simplest way to use this device is in auto-answer mode. It’s also possible to control the device using a keyboard, mouse, and HDMI monitor, or by discovering its IP address using a nearby computer.

Which radio stations can I connect with?
Find SIP enabled radio stations on our SIP Studio Map. An easy way for radio stations to call SIP codecs, is to dial the SIP address from the dial pad in ipDTL.
Can I make outbound SIP or ISDN calls?
As the name suggests, the XLR SIP Codec ‘Zero’ is designed to be ‘zero configuration’.  It arrives pre-configured, and the user simply switches the microphone on for calls, and off when privacy is required.  Technically savvy users can access it through its IP address from a nearby computer, or attach a monitor, keyboard and mouse.  Outbound calls can be established using these methods. An additional Tel+ subscription is required for outbound ISDN calls.
Can I receive inbound ISDN calls?
There is a way to receive an ISDN call via a pre-configured on-screen quick-dial button.  ISDN numbers are assigned dynamically on demand, or you can get your own LA area ISDN number with your sip.audio subscription.  A package including a Tel subscription is required for inbound ISDN calls.
Can I connect the USB SIP Codec to the internet using wifi?
Wi-Fi or mobile broadband are the most common causes of radio interviews dropping off. To ensure reliability, our SIP Codecs connect to your broadband router using a physical cable.  Most wifi routers have ethernet sockets on the back.  You can use an extra long ethernet cable, or ‘Powerline’ adaptors where cable routing is not an option.

Warranty & Support

  • Free repair or replacement, while sip.audio subscription remains active, up to 5 years.
  • Free technical support via support.inqualitymedia.com.

Technical Specifications

Protocols SIP
EBU Tech 3326 / N/ACIP (partially compliant)
AES67 (beta)
Codecs Opus
Audio I/O 2 x XLR Balanced Output (L+R) – Line level
2 x XLR Balanced Input (L+R) – Switch between Line & Mic level (with or without 48v phantom power)*.
* May not be suitable for some dynamic or low sensitivity microphones.
1/4″ Headphone jack with optional low latency microphone monitoring.
USB Audio – Not available while XLR connectors are active.
AES67 (beta) via ethernet.
Network Ethernet (DHCP or Static)
Power AC 100-240v 0.5A 50-60Hz
DC 5.1v 3A USB C
USB 4 x ports
Support for audio, keyboard, mouse.
1.2A max USB power (0.5A per port)
HDMI Displays device status and optional UI.

Product Manual coming soon.

Delivery within USA or UK takes between 2 & 5 working days.  Other addresses can take a little longer.