Abstract: An arm immobilization apparatus (800) is disclosed, which comprises a main body (802) arranged to be of a substantially oblong shape; and a location strap (804) having first and second ends (806a, 806b), wherein the first end is arranged to be coupled to a long edge of the main body, and the second end is coupled to first and second short edges (808a, 808b) of the main body. Corresponding methods for wearing the arm immobilization apparatus are also disclosed.

Abstract: An arm immobilization apparatus (800) is disclosed, which comprises a main body (802) arranged to be of a substantially oblong shape; and a location strap (804) having first and second ends (806a, 806b), wherein the first end is arranged to be coupled to a long edge of the main body, and the second end is coupled to first and second short edges (808a, 808b) of the main body. Corresponding methods for wearing the arm immobilization apparatus are also disclosed.

Abstract: An optical fibre communications system includes an exchange (E) and a plurality of subscriber lines (1). The exchange (E) provides a plurality of services in different subcarrier frequencies (6,8,9,10). Each subscriber line (1) is provided with terminal apparatus (5) operable at different subscriber frequencies, and a control (11) at the exchange (E) tunes the terminal apparatus to transmit and/or receive on a particular frequency in response to a request. The request may be a signal from the terminal apparatus (5), or an incoming service request addressed to the particular terminal apparatus.