5MDC 1200 SYSTEM OPERATIONSection 3The MDC 1200 signaling system enhances your trans-ceiver’s capabilities. You can receive or transmit a PTTID. PTT ID is a calling station ID that is sent by pushingor releasing [PTT].An additional feature of the MDC 1200 system includedin Icom transceivers is called aliasing. Each transceiveron the system has a unique ID number. Aliasing is asubstitute for this ID number and you can give an al-phanumeric name for each station ID. In transmit, youcan use this alias to select a transceiver to call. In re-ceive, the alias of the calling station is displayed in-stead of the ID.NOTE:To use the MDC 1200 system, set the related set-tings by using the CS-G88 programming software(purchase separately).The factory default is not set to allow the system op-eration.About the MDC 1200 systemReceiving TransmittingD Receiving a PTT ID1. When a PTT ID is received:• Beeps sound.• The calling station ID (or alias) is displayed.< Calling station ID >< Alias >2. Hold down [PTT] and speak into the microphone.3. Release [PTT] to receive a response.D Transmitting a PTT IDAnother person can view your station ID. If the samealias is set at the receiving side, the alias is displayedinstead of the station ID.1. Push [PTT] to make a call.2. Beeps sound.3. Your station ID will be transmitted when you push[PTT] (at the beginning of transmission) or release it(at the end of transmission), depending on the set-ting in the CS-G88.