Hi FlorentOur client is still to try an explicit mapping of GSM 03.38 (7 bit) to data_coding=0, which I am hopeful will resolve the problem. We will let you know on this point. Meantime CLX are reporting a separate issue in relation to transmit and receive bindings. Apparently Campaign is requesting multiple transmit bindings, whereas CLX is expecting a maximum of two bindings: one transmit and one receive. With both CLX bindings allocated to transmit, it is finding no way to routinely return de...