133CONVENTIONAL OPERATION3 Call procedureWhen your system employs tone signalling (excluding CTCSS andDTCS), the call procedure may be necessary prior to voice trans-mission. The tone signalling employed may be a selective callingsystem which allows you to call specific station(s) only and preventunwanted stations from contacting you.q Select the desired TX code channel or 2/5-tone code accordingto your System Operator’s instructions.• This may not be necessary depending on programming.w Push the call key (assigned to one of the dealer programmablekeys.) (p. 11)e After transmitting a 2/5-tone code, the remainder of your com-munication can be carried out in the normal fashion.Selective callingNon-selective calling