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Figure 34 – g18 Receiving a data call Sending and Receiving data in different flow controls 4.1.12 Flow control set to hardware Flow Control (FC) 4.1.12.1. Sending Data When data is being sent by the g18, the only dynamic signals through the data transfer are TXD and CTS. The DTE device should keep DTR ON. TXD is used in order to transmit the data from the terminal to the g18, and CTS is used in order to control the data flow. When data is being transferred too rapidly to the modem, in a rate greater then its transfer rate, and its buffers become full, the modem sets CTS inactive high, until he accomplishes the transfer. When the modem is ready to accept more data, it sets the CTS signal active low again. Figure 35 – g18 sending data HW flow control g18 Modem Integration and Application Developers Guide version 2.0 Page 60
