| 摘要 |
A two-way selective call device (106) for determining if a response was received to a message transmitted to a designation device including at least one switch (216) to construct the message having at least an identifiable character. An address book designates at least one destination device (106, 112, 116, 118) and a selector (216) selects a destination device (106) of the at least one destination device (106, 112, 116, 118) to receive the message. A transmitter (222) transmits the message to the destination device (106) and a timer (302) measures a first predetermined time. A processor (206) coupled to the receiver (204) monitors received messages during the first predetermined time period to determine when a response to the message was received and an output device (208, 212, 214) indicates when the response from the at least one identified destination device was not received within the first predetermined time period.
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