A desolate rock in the Sonnet System, Couplet is used for the express purpose of connecting Iamb to the Interstellar Communication Grid. The grid's largest central hub was built on Couplet after the local chapter of the Council on Arts and Culture petitioned the NCRB for the authorization for extra intersystem communications stations to be constructed in order to handle the increased demand for Iambic media from all other systems. The end result of the construction of the Couplet hub was that the Sonnet System became an integral part of the grid's backbone.