Operation025-9368H 31“interconnect not available at this time” voice prompt (prompt #8) is sent to the telephone, and thecall request is terminated. The caller has twice the programmed DTMF interdigit time to enter thefirst overdial digit. After the first digit, the specified DTMF interdigit time is the maximum timeallowed between digits. If no digits are over-dialed, and an Autocall user has been programmed forthat line, the Model 748 will automatically call that user (radio). If not enough digits are dialed, theModel 748 will error the caller off and disconnect the call.Telephone to Mobile CallsThe caller first gains access to the Model 748 (see the previous subsection, “Call Setup (Telco)”). Avalid user number or ANI has been entered, the Model 748 has keyed the transmitter, sent anyrequired selective calling sequence (paging tones) and is now sending ringing tones both to themobile and the telephone caller. The mobile must answer the call as specified by Answer type forthat user (radio) before the Mobile answer time expires or the call will be disconnected. The Model748 will ring on the channel, and to the telephone for the specified Ringouts sent to mobile. If themobile does not answer, the “your call cannot be processed at this time” voice prompt (prompt #4) issent to the telco and the call is disconnected. Once the mobile has answered, the conversation timerhas been initialized with Call limit time for that user (radio). If enabled, the mobile activity timer hasbeen initialized. Each time the mobile keys up, the Mobile activity time is used to reset the timer. Ifat any time the mobile activity timer expires, the call is disconnected. Single warning beeps are sentevery three seconds starting 12 seconds before the mobile activity timer expires. The conversationtimer may not be reset since this controls the length of the call. Double warning beeps are sent everythree seconds starting 15 seconds before the call is disconnected. To terminate the call, the calling(phone) party enters “#0” or a long “#”, or the mobile must enter its Disconnect ANI.Telephone-to-Talkback Mobile CallsThe caller first gains access to the Model 748 (see “Call Setup (Telco)” earlier in this section). Avalid user number or ANI has been entered, the Model 748 has keyed the transmitter, any requiredselective calling sequence (paging tones) will now be sent, the caller will hear one ring while thepaging tones are being sent. The Model 748 will then send the “speak your message at the prompt”voice prompt (prompt #6) followed by a “go ahead” prompt to the caller. Once the prompt is heard,the audio path between the phone line and the transmitter is opened and caller's voice is transmittedover the radio channel. The Talkback mobile must answer as specified by Answer type for that user(radio), within the specified Mobile answer time. If the mobile does not answer, the “your callcannot be processed at this time” voice prompt (prompt #4) is sent to the telco and the call isdisconnected. Once the mobile answers, the remainder of the call proceeds exactly the same asequipment type “Mobile”.Application note:If a selective calling sequence is not required (no paging tones programmed), a single ring on thechannel will be sent instead.
