A method for transmitting information from a radio base station node to a first mobile station and a second mobile station is disclosed herein. The first and second mobile stations are paired on and share a same carrier frequency, TDMA frame, and time slot in a wireless communication system. Further, the first and second mobile stations are allocated on a first and second VAMOS sub-channel, respectively. The method includes transmitting a GMSK modulated SACCH burst of a SACCH block in a predetermined time slot and TDMA frame on one of the first and second VAMOS sub-channel. The method further includes simultaneously muting the other of the first and second VAMOS sub-channels in the predetermined time slot and TDMA frame.