#include <net_config.h>

void modem_listen (void);

The modem_listen function puts the local modem in answering mode to accept any incoming call. The function:

• resets and initializes the local modem
• waits for the message "RING"
• accepts the incoming call
• waits for further calls if the line gets disconnected.

The modem_listen function for the null modem is in the RL-TCPnet library. The prototype is defined in net_config.h. If you want to use a standard modem connection, you must copy std_modem.c into your project directory.

note

• The TCPnet system calls modem_listen when the PPP or SLIP network daemon is running in server mode.
• The modem_listen function sends commands to the local modem to perform the steps needed to listen for incoming calls. If the local modem does not respond with the message "OK", the function resends the commands a few times before giving up on trying to get into listen mode.
• The modem driver functions must not use waiting loops because loops block the TCPnet system.

The modem_listen function does not return any value.

modem_dial, modem_hangup, modem_init

void modem_listen (void) {
  /* This function puts Modem into Answering Mode. */
  step = 0;
  listen_mode = 1;
  proc_listen ();
}