Jabra BIZ 2300 Headset Video Electronics 2 Port Low Profile Native

2 Port Low Profile Native RS232 PCI Express Serial Card with 16550 UART

Brand Compatibility: Yealink

So when the signal reaches the other end it reflects back along the optical cable

The Trulink USB 2

Jabra BIZ 2300 Headset Video Electronics 2 Port Low Profile NativeJabra BIZ 2300 Headset Engineered to be the affordable contact center headset Breath resistant microphone with noise cancelation Durable reinforced cord and programmable buttons for USB variant 20% lighter than competitors with padded ear cushions and 360 flexible spin boom arm All day wearing comfort Sharp looking over head design will give you a comfortable fit Boom mic lets you chat with your friends & family on Skype and on multiplayer network