freetdm: E&M: Set the line offhook when suspended

libs/freetdm/src/ftmod/ftmod_analog_em/ftmod_analog_em.c

@@ -291,13 +291,23 @@ static FIO_CHANNEL_SET_SIG_STATUS_FUNCTION(analog_em_set_channel_sig_status)
 		return FTDM_FAIL;
 	case FTDM_SIG_STATE_SUSPENDED:
 		if (!ftdm_test_flag(ftdmchan, FTDM_CHANNEL_SUSPENDED)) {
+			int cas_bits = 0xFF;
 			ftdm_set_flag(ftdmchan, FTDM_CHANNEL_SUSPENDED);
+			ftdm_channel_command(ftdmchan, FTDM_COMMAND_SET_CAS_BITS, &cas_bits);
+			if (!ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OFFHOOK)) {
+				ftdm_channel_command(ftdmchan, FTDM_COMMAND_OFFHOOK, NULL);
+			}
 			ftdm_analog_set_chan_sig_status(ftdmchan, FTDM_SIG_STATE_SUSPENDED);
 		}
 		break;
 	case FTDM_SIG_STATE_UP:
 		if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_SUSPENDED)) {
+			int cas_bits = 0x00;
 			ftdm_clear_flag(ftdmchan, FTDM_CHANNEL_SUSPENDED);
+			ftdm_channel_command(ftdmchan, FTDM_COMMAND_SET_CAS_BITS, &cas_bits);
+			if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OFFHOOK)) {
+				ftdm_channel_command(ftdmchan, FTDM_COMMAND_ONHOOK, NULL);
+			}
 			if (!ftdm_test_flag(ftdmchan, FTDM_CHANNEL_IN_ALARM)) {
 				ftdm_analog_set_chan_sig_status(ftdmchan, FTDM_SIG_STATE_UP);
 			}