GYTS cable is universal optical cable; it can be used in aerial, duct and direct-buried while GYTA can be used in aerial cable and duct cable not in direct-buried cable.The S in GYTS refers to steel strip which can sustain large pulling force, the A in GYTA refers to Aluminum strip which has better anti-rust and moisture resistance than steel strip, therefore, GYTA cable has longer service life when used in duct transmission. Choose GYTS cable when tensile strength is needed.