Jabra, Switch, models:

14201-20 -	Datasheet
EHS -	Brochure
LINK 14201-20 - DATASHEET FOR TOSHIBA PHONES	How To Connect Datasheet
LINK 180	Datasheet
Link 14201-19	How To Connect
Link 180	Quick Start Manual
Link 950 USB-A	How Do
ONE-CLICK COMPUTER-TELEPHONY SWITCH	Manual