static int Lucent_handle_dle(char data)
{
switch (data)
{
/*
* It appears that Lucent modems have just a single
* silence detection notification, that always reports
* as "<DLE>-s". This report indicates that silence
* exceeding the duration of the interval set with AT+VSD
* has been detected, regardless of whether there was
* previously good data or not.
*
* So here we override the IS_101 mapping of DLE-s to
* "NO_VOICE_ENERGY", and change it to "SILENCE_DETECTED".
*
* Caveat: this will break vgetty's heuristic "if <DLE>s
* was seen, there is nobody at the calling end, so let's try
* data/fax mode". So if you have a Lucent modem and want to
* do voice and data/fax on the same line, you need calling
* modems that send a CNG tone, or have the caller dial up,
* wait for a few seconds, and then send another DTMF tone
* (which will trigger data/fax mode).
*
* Patch by Paul Fox <*****@*****.**>
*/
case 's':
return(queue_event(create_event(SILENCE_DETECTED)));
}
return(IS_101_handle_dle(data));
}
static int
Multitech_5600ZDXv_handle_dle(char data)
{
switch (data) {
/*
* Local handset goes off hook
*/
case 't':
return(queue_event(create_event(HANDSET_OFF_HOOK)));
}
return(IS_101_handle_dle(data));
}
int ISDN4Linux_handle_dle(char data)
{
switch (data)
{
case DC4:
lprintf(L_WARN, "%s: <DLE> <DC4> received", program_name);
voice_stop_current_action();
switch (voice_command("", "OK|VCON|NO CARRIER"))
{
case VMA_USER_3:
queue_event(create_event(NO_CARRIER));
break;
case VMA_USER_1:
case VMA_USER_2:
break;
default:
return FAIL;
}
got_DLE_DC4 = TRUE;
return (OK);
case ETX:
lprintf(L_WARN, "%s: <DLE> <ETX> received", program_name);
voice_stop_current_action();
switch (voice_command("", "OK|VCON|NO CARRIER"))
{
case VMA_USER_3:
queue_event(create_event(NO_CARRIER));
break;
case VMA_USER_1:
case VMA_USER_2:
break;
default:
return FAIL;
}
return (OK);
default:
return(IS_101_handle_dle(data));
}
}