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1.6 Switching Example

The following example switching application has four boards in the system: Network board connected to a T1 trunk providing 24 telephone channels. Station interface board containing 8 operator workstation telephones. DSP resource board providing 24 ports of voice play/record and DTMF generation/detection. Fax board providing 24 ports for transmitting and receiving faxes. Figure 11. Example Switching Configuration
A typical incoming call would be serviced in the following steps: When a call is received on one of the T1 channels, a switch connection is made to connect the call to a DSP resource which plays a voice prompt. The caller is instructed to enter a digit to choose a service. The DSP resources are used to detect the digit entered by the caller. Figure 12. Connecting to DSP Resources The caller presses "0" to speak to an operator. Switch connections are made to connect the caller to an available operator workstation. Figure 13. Connecting to an Operator Station The caller presses "5" to request a fax. A switch connection is made to connect the call to an available port on the fax board. Using the DSP resources on the fax board, a fax is sent over the T1 channel. Figure 14. Connecting to Fax Resources When the caller hangs up, the application must disable the switch connections. Figure 15. Disabling Switch Connections

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