tag	line	file	source code
ISDN_USAGE_MODEM	150	drivers/isdn/isdn_tty.c	i = isdn_get_free_channel(ISDN_USAGE_MODEM, m->mdmreg[14], m->mdmreg[15], -1, -1);
ISDN_USAGE_MODEM	205	drivers/isdn/isdn_tty.c	isdn_free_channel(info->isdn_driver, info->isdn_channel, ISDN_USAGE_MODEM);
ISDN_USAGE_MODEM	1286	drivers/isdn/isdn_tty.c	dev->usage[idx] |= ISDN_USAGE_MODEM;
ISDN_USAGE_MODEM	208	include/linux/isdn.h	#define USG_MODEM(x)    ((x & ISDN_USAGE_MASK)==ISDN_USAGE_MODEM)