The Jabra GN1221 is a cord offering inexpensive connectivity to a wealth of telephone systems and no nonsense, hassle-free compliance with the latest in EU noise regulations. The Jabra GN1221 is part of the Jabra GN1200 series and builds on the same intuitive design. Aside from complying with Noise-at-Work regulations, the Jabra GN1221 is the answer to a common issue. When hooking up a new headset there is not always a dial tone. The problem could be the headset or the telephone? But chances are it is the cord. Even though the headset and telephone may be plug compatible, the wiring is determined by the individual telephone manufacturer.