diff --git a/config.c b/config.c
index 8e6138a..5930a7d 100644
--- a/config.c
+++ b/config.c
@@ -1,8 +1,10 @@
+#include <ctype.h>
 #include <getopt.h>
 
 #include "config.h"
 #include "mediator.h"
 
+char *config_file_path;
 unsigned int config_interval = MEDIATOR_DEFAULT_INTERVAL;
 uint8_t config_dumpcdr = MEDIATOR_DEFAULT_DUMPCDR;
 uint8_t config_daemonize = MEDIATOR_DEFAULT_DAEMONIZE;
@@ -36,39 +38,108 @@ med_stats_period_t config_stats_period = MEDIATOR_DEFAULT_STATSPERIOD;
 int config_maintenance = 0;
 int strict_leg_tokens = 0;
 
+enum config_option {
+	OPT_CONFIGFILE = 'c',
+	OPT_DAEMONIZE = 'd',
+	OPT_PIDFILE = 'D',
+	OPT_SYSLOG = 'l',
+	OPT_INTERVAL = 'i',
+	OPT_MED_HOST = 'h',
+	OPT_MED_PORT = 'o',
+	OPT_MED_USER = 'u',
+	OPT_MED_PASS = 'p',
+	OPT_MED_DB = 'b',
+	OPT_CDR_HOST = 'H',
+	OPT_CDR_PORT = 'O',
+	OPT_CDR_USER = 'U',
+	OPT_CDR_PASS = 'P',
+	OPT_CDR_DB = 'B',
+	OPT_PROV_HOST = 'S',
+	OPT_PROV_PORT = 'T',
+	OPT_PROV_USER = 'R',
+	OPT_PROV_PASS = 'A',
+	OPT_PROV_DB = 'N',
+	OPT_STATS_HOST = 'Z',
+	OPT_STATS_PORT = 'z',
+	OPT_STATS_USER = 'W',
+	OPT_STATS_PASS = 'w',
+	OPT_STATS_DB = 'X',
+	OPT_STATS_PERIOD = 'x',
+	OPT_MAINTENANCE = 'm',
+	OPT_LEG_TOKENS = 's',
+};
+
+static const char options[] = "?c:D:i:dlh:u:p:b:o:H:U:P:B:O:S:T:R:A:N:Z:z:W:w:X:x:ms";
+
+struct option long_options[] = {
+	{ "configfile", required_argument, NULL, OPT_CONFIGFILE },
+	{ "pidfile", required_argument, NULL, OPT_PIDFILE },
+	{ "daemonize", no_argument, NULL, OPT_DAEMONIZE },
+	{ "syslog", no_argument, NULL, OPT_SYSLOG },
+	{ "interval", required_argument, NULL, OPT_INTERVAL },
+	{ "med-host", required_argument, NULL, OPT_MED_HOST },
+	{ "med-port", required_argument, NULL, OPT_MED_PORT },
+	{ "med-user", required_argument, NULL, OPT_MED_USER },
+	{ "med-pass", required_argument, NULL, OPT_MED_PASS },
+	{ "med-db", required_argument, NULL, OPT_MED_DB },
+	{ "cdr-host", required_argument, NULL, OPT_CDR_HOST },
+	{ "cdr-port", required_argument, NULL, OPT_CDR_PORT },
+	{ "cdr-user", required_argument, NULL, OPT_CDR_USER },
+	{ "cdr-pass", required_argument, NULL, OPT_CDR_PASS },
+	{ "cdr-db", required_argument, NULL, OPT_CDR_DB },
+	{ "prov-host", required_argument, NULL, OPT_PROV_HOST },
+	{ "prov-port", required_argument, NULL, OPT_PROV_PORT },
+	{ "prov-user", required_argument, NULL, OPT_PROV_USER },
+	{ "prov-pass", required_argument, NULL, OPT_PROV_PASS },
+	{ "prov-db", required_argument, NULL, OPT_PROV_DB },
+	{ "stats-host", required_argument, NULL, OPT_STATS_HOST },
+	{ "stats-port", required_argument, NULL, OPT_STATS_PORT },
+	{ "stats-user", required_argument, NULL, OPT_STATS_USER },
+	{ "stats-pass", required_argument, NULL, OPT_STATS_PASS },
+	{ "stats-db", required_argument, NULL, OPT_STATS_DB },
+	{ "stats-period", required_argument, NULL, OPT_STATS_PERIOD },
+	{ "maintenance", no_argument, NULL, OPT_MAINTENANCE },
+	{ "leg-tokens", no_argument, NULL, OPT_LEG_TOKENS },
+	{ NULL, 0, NULL, 0 },
+};
+
 static void config_help(const char *self, int rc)
 {
-	printf("mediator %s - Creates call detail records from OpenSER accounting.\n" \
-		"Usage: %s [-?] [-d] [-D pidpath]\n" \
-		"  -D\tThe path of the PID file (default = '%s').\n" \
-		"  -d\tEnables daemonization of the process (default = disabled).\n" \
-		"  -l\tEnables dumping of CDRs to syslog (default = disabled).\n" \
-		"  -i\tThe creation interval (default = %d).\n" \
-		"  -h\tThe ACC db host (default = '%s').\n" \
-		"  -o\tThe ACC db port (default = '%d').\n" \
-		"  -u\tThe ACC db user (default = '%s').\n" \
-		"  -p\tThe ACC db pass (default = '%s').\n" \
-		"  -b\tThe ACC db name (default = '%s').\n" \
-		"  -H\tThe CDR db host (default = '%s').\n" \
-		"  -O\tThe CDR db port (default = '%d').\n" \
-		"  -U\tThe CDR db user (default = '%s').\n" \
-		"  -P\tThe CDR db pass (default = '%s').\n" \
-		"  -B\tThe CDR db name (default = '%s').\n" \
-		"  -S\tThe prov db host (default = '%s').\n" \
-		"  -T\tThe prov db port (default = '%d').\n" \
-		"  -R\tThe prov db user (default = '%s').\n" \
-		"  -A\tThe prov db pass (default = '%s').\n" \
-		"  -N\tThe prov db name (default = '%s').\n" \
-		"  -Z\tThe stats db host (default = '%s').\n" \
-		"  -z\tThe stats db port (default = '%d').\n" \
-		"  -W\tThe stats db user (default = '%s').\n" \
-		"  -w\tThe stats db pass (default = '%s').\n" \
-		"  -X\tThe stats db name (default = '%s').\n" \
-		"  -x\tThe stats db period (default = '%d', 1=hour, 2=day, 3=month).\n" \
-		"  -m\tMaintenance mode (do nothing, just sleep).\n" \
-		"  -s\tStrict acc fields (move to trash otherwise).\n" \
-		"  -?\tDisplays this message.\n",
-		MEDIATOR_VERSION, self,
+	printf(
+"mediator %s - Creates call detail records from OpenSER accounting.\n" \
+"Usage: %s [<option>...]\n" \
+"\n" \
+"Options:\n" \
+"  -c, --configfile FILE\tThe config file to use (default = '%s').\n" \
+"  -D, --pidfile PIDFILE\tThe path of the PID file (default = '%s').\n" \
+"  -d, --daemonize\tEnables daemonization of the process (default = disabled).\n" \
+"  -l, --syslog\t\tEnables dumping of CDRs to syslog (default = disabled).\n" \
+"  -i, --interval INT\tThe creation interval (default = %d).\n" \
+"  -h, --med-host HOST\tThe ACC db host (default = '%s').\n" \
+"  -o, --med-port PORT\tThe ACC db port (default = '%d').\n" \
+"  -u, --med-user USER\tThe ACC db user (default = '%s').\n" \
+"  -p, --med-pass PASS\tThe ACC db pass (default = '%s').\n" \
+"  -b, --med-db DB\tThe ACC db name (default = '%s').\n" \
+"  -H, --cdr-host HOST\tThe CDR db host (default = '%s').\n" \
+"  -O, --cdr-port PORT\tThe CDR db port (default = '%d').\n" \
+"  -U, --cdr-user USER\tThe CDR db user (default = '%s').\n" \
+"  -P, --cdr-pass PASS\tThe CDR db pass (default = '%s').\n" \
+"  -B, --cdr-db DB\tThe CDR db name (default = '%s').\n" \
+"  -S, --prov-host HOST\tThe prov db host (default = '%s').\n" \
+"  -T, --prov-port PORT\tThe prov db port (default = '%d').\n" \
+"  -R, --prov-user USER\tThe prov db user (default = '%s').\n" \
+"  -A, --prov-pass PASS\tThe prov db pass (default = '%s').\n" \
+"  -N, --prov-db DB\tThe prov db name (default = '%s').\n" \
+"  -Z, --stats-host HOST\tThe stats db host (default = '%s').\n" \
+"  -z, --stats-port PORT\tThe stats db port (default = '%d').\n" \
+"  -W, --stats-user USER\tThe stats db user (default = '%s').\n" \
+"  -w, --stats-pass PASS\tThe stats db pass (default = '%s').\n" \
+"  -X, --stats-db DB\tThe stats db name (default = '%s').\n" \
+"  -x, --stats-period INT\tThe stats db period (default = '%d', 1=hour, 2=day, 3=month).\n" \
+"  -m, --maintenance\tMaintenance mode (do nothing, just sleep).\n" \
+"  -s, --leg-tokens\tStrict acc fields (move to trash otherwise).\n" \
+"  -?, --help\t\tDisplays this message.\n",
+		MEDIATOR_VERSION, self, MEDIATOR_DEFAULT_CONFIG_FILE,
 		MEDIATOR_DEFAULT_PIDPATH, MEDIATOR_DEFAULT_INTERVAL,
 		MEDIATOR_DEFAULT_ACCHOST, MEDIATOR_DEFAULT_ACCPORT,
 		MEDIATOR_DEFAULT_ACCUSER, MEDIATOR_DEFAULT_ACCPASS,
@@ -86,82 +157,110 @@ static void config_help(const char *self, int rc)
 	exit(rc);
 }
 
-static void config_set_string_option(char **str, char *opt)
+static void config_set_string_option(char **str, const char *opt)
 {
 	free(*str);
 	*str = strdup(opt);
 }
 
-static void config_set_string_default(char **str, char *def)
+static void config_set_string_default(char **str, const char *def)
 {
 	if (*str == NULL)
 		*str = strdup(def);
 }
 
-int config_parse_cmdopts(int argc, char **argv)
+static void config_set_option(enum config_option option, const char *value)
 {
-	int c;
-
-	while((c = getopt(argc, argv, "D:i:dl?h:u:p:b:o:H:U:P:B:O:S:T:R:A:N:Z:z:W:w:X:x:ms")) != -1)
-	{
-		if(c == '?' || c == ':')
-			config_help(argv[0], 0);
-		else if(c == 'd')
-			config_daemonize = 1;
-		else if(c == 'l')
-			config_dumpcdr = 1;
-		else if(c == 'D')
-			config_set_string_option(&config_pid_path, optarg);
-		else if(c == 'i')
-			config_interval = atoi(optarg);
-		else if(c == 'h')
-			config_set_string_option(&config_med_host, optarg);
-		else if(c == 'u')
-			config_set_string_option(&config_med_user, optarg);
-		else if(c == 'p')
-			config_set_string_option(&config_med_pass, optarg);
-		else if(c == 'b')
-			config_set_string_option(&config_med_db, optarg);
-		else if(c == 'o')
-			config_med_port = atoi(optarg);
-		else if(c == 'H')
-			config_set_string_option(&config_cdr_host, optarg);
-		else if(c == 'U')
-			config_set_string_option(&config_cdr_user, optarg);
-		else if(c == 'P')
-			config_set_string_option(&config_cdr_pass, optarg);
-		else if(c == 'B')
-			config_set_string_option(&config_cdr_db, optarg);
-		else if(c == 'O')
-			config_cdr_port = atoi(optarg);
-		else if(c == 'S')
-			config_set_string_option(&config_prov_host, optarg);
-		else if(c == 'R')
-			config_set_string_option(&config_prov_user, optarg);
-		else if(c == 'A')
-			config_set_string_option(&config_prov_pass, optarg);
-		else if(c == 'N')
-			config_set_string_option(&config_prov_db, optarg);
-		else if(c == 'T')
-			config_prov_port = atoi(optarg);
-		else if(c == 'Z')
-			config_set_string_option(&config_stats_host, optarg);
-		else if(c == 'z')
-			config_stats_port = atoi(optarg);
-		else if(c == 'W')
-			config_set_string_option(&config_stats_user, optarg);
-		else if(c == 'w')
-			config_set_string_option(&config_stats_pass, optarg);
-		else if(c == 'X')
-			config_set_string_option(&config_stats_db, optarg);
-		else if(c == 'x')
-			config_stats_period = (med_stats_period_t)atoi(optarg);
-		else if(c == 'm')
-			config_maintenance = 1;
-		else if(c == 's')
-			strict_leg_tokens = 1;
+	switch (option) {
+	case OPT_DAEMONIZE:
+		config_daemonize = 1;
+		break;
+	case OPT_SYSLOG:
+		config_dumpcdr = 1;
+		break;
+	case OPT_CONFIGFILE:
+		config_set_string_option(&config_file_path, value);
+		break;
+	case OPT_PIDFILE:
+		config_set_string_option(&config_pid_path, value);
+		break;
+	case OPT_INTERVAL:
+		config_interval = atoi(value);
+		break;
+	case OPT_MED_HOST:
+		config_set_string_option(&config_med_host, value);
+		break;
+	case OPT_MED_USER:
+		config_set_string_option(&config_med_user, value);
+		break;
+	case OPT_MED_PASS:
+		config_set_string_option(&config_med_pass, value);
+		break;
+	case OPT_MED_DB:
+		config_set_string_option(&config_med_db, value);
+		break;
+	case OPT_MED_PORT:
+		config_med_port = atoi(value);
+		break;
+	case OPT_CDR_HOST:
+		config_set_string_option(&config_cdr_host, value);
+		break;
+	case OPT_CDR_USER:
+		config_set_string_option(&config_cdr_user, value);
+		break;
+	case OPT_CDR_PASS:
+		config_set_string_option(&config_cdr_pass, value);
+		break;
+	case OPT_CDR_DB:
+		config_set_string_option(&config_cdr_db, value);
+		break;
+	case OPT_CDR_PORT:
+		config_cdr_port = atoi(value);
+		break;
+	case OPT_PROV_HOST:
+		config_set_string_option(&config_prov_host, value);
+		break;
+	case OPT_PROV_USER:
+		config_set_string_option(&config_prov_user, value);
+		break;
+	case OPT_PROV_PASS:
+		config_set_string_option(&config_prov_pass, value);
+		break;
+	case OPT_PROV_DB:
+		config_set_string_option(&config_prov_db, value);
+		break;
+	case OPT_PROV_PORT:
+		config_prov_port = atoi(value);
+		break;
+	case OPT_STATS_HOST:
+		config_set_string_option(&config_stats_host, value);
+		break;
+	case OPT_STATS_USER:
+		config_set_string_option(&config_stats_user, value);
+		break;
+	case OPT_STATS_PASS:
+		config_set_string_option(&config_stats_pass, value);
+		break;
+	case OPT_STATS_PORT:
+		config_stats_port = atoi(value);
+		break;
+	case OPT_STATS_DB:
+		config_set_string_option(&config_stats_db, value);
+		break;
+	case OPT_STATS_PERIOD:
+		config_stats_period = (med_stats_period_t)atoi(value);
+		break;
+	case OPT_MAINTENANCE:
+		config_maintenance = 1;
+		break;
+	case OPT_LEG_TOKENS:
+		strict_leg_tokens = 1;
+		break;
 	}
+}
 
+static void config_set_defaults(void)
+{
 	/* Set defaults for string values. */
 	config_set_string_default(&config_pid_path, MEDIATOR_DEFAULT_PIDPATH);
 	config_set_string_default(&config_med_host, MEDIATOR_DEFAULT_ACCHOST);
@@ -180,10 +279,111 @@ int config_parse_cmdopts(int argc, char **argv)
 	config_set_string_default(&config_stats_user, MEDIATOR_DEFAULT_STATSUSER);
 	config_set_string_default(&config_stats_pass, MEDIATOR_DEFAULT_STATSPASS);
 	config_set_string_default(&config_stats_db, MEDIATOR_DEFAULT_STATSDB);
+}
+
+static int config_parse_line(char *line)
+{
+	char *sep = line;
+	const char *value;
+	struct option *option;
+
+	for (sep = line; *sep; sep++)
+		if (isspace(*sep) || *sep == '=')
+			break;
+	for (value = sep; *value; value++)
+		if (!isspace(*value) && *value != '=')
+			break;
+	if (value != sep)
+		*sep = '\0';
+
+	for (option = long_options; option->name; option++)
+		if (strcmp(option->name, line) == 0)
+			break;
+
+	if (option->name == NULL) {
+		syslog(LOG_ERR, "No option found in config file line '%s'", line);
+		return -1;
+	}
+
+	if (option->has_arg == no_argument && *value != '\0') {
+		syslog(LOG_ERR, "Unexpected value in config file option '%s'",
+		       option->name);
+		return -1;
+	} else if (option->has_arg == required_argument && *value == '\0') {
+		syslog(LOG_ERR, "Missing value in config file option '%s'",
+		       option->name);
+		return -1;
+	}
+
+	config_set_option(option->val, value);
+
+	return 0;
+}
+
+static int config_parse_file(const char *filename)
+{
+	FILE *conffile;
+	char *line = NULL;
+	size_t len = 0;
+	ssize_t nread;
+
+	syslog(LOG_DEBUG, "Loading config file '%s'", filename);
+
+	conffile = fopen(filename, "r");
+	if (conffile == NULL) {
+		if (errno == ENOENT)
+			return 0;
+
+		syslog(LOG_ERR, "Error loading config file: %s", strerror(errno));
+		return -1;
+	}
+
+	while ((nread = getline(&line, &len, conffile)) >= 0) {
+		if (line[0] == '#')
+			continue;
+
+		if (line[nread -1] == '\n')
+			line[nread - 1] = '\0';
+
+		if (config_parse_line(line) < 0) {
+			syslog(LOG_ERR, "Error parsing config file");
+			return -1;
+		}
+	}
+
+	free(line);
+	fclose(conffile);
+
+	return 0;
+}
+
+static int config_parse_cmdopts(int argc, char **argv)
+{
+	int c;
+
+	while ((c = getopt_long(argc, argv, options, long_options, NULL)) != -1)
+	{
+		if (c == '?' || c == ':')
+			config_help(argv[0], 0);
+		else
+			config_set_option(c, optarg);
+	}
 
 	return 0;
 }
 
+int config_parse(int argc, char **argv)
+{
+	int rc = 0;
+
+	rc |= config_parse_cmdopts(argc, argv);
+	config_set_string_default(&config_file_path, MEDIATOR_DEFAULT_CONFIG_FILE);
+	rc |= config_parse_file(config_file_path);
+	config_set_defaults();
+
+	return rc;
+}
+
 void config_cleanup()
 {
 	free(config_pid_path);
diff --git a/config.h b/config.h
index a2f7cda..16958b5 100644
--- a/config.h
+++ b/config.h
@@ -39,7 +39,7 @@ extern uint8_t config_dumpcdr;
 extern int config_maintenance;
 extern int strict_leg_tokens;
 
-int config_parse_cmdopts(int argc, char **argv);
+int config_parse(int argc, char **argv);
 void config_cleanup();
 
 #endif /* _CONFIG_H */
diff --git a/mediator.c b/mediator.c
index 5287237..ecfd956 100644
--- a/mediator.c
+++ b/mediator.c
@@ -171,7 +171,7 @@ int main(int argc, char **argv)
 	signal(SIGTERM, mediator_signal);
 	signal(SIGINT, mediator_signal);
 
-	if(config_parse_cmdopts(argc, argv) == -1)
+	if (config_parse(argc, argv) == -1)
 	{
 		return -1;
 	}
diff --git a/mediator.h b/mediator.h
index e74d9ad..e9f8a93 100644
--- a/mediator.h
+++ b/mediator.h
@@ -17,6 +17,7 @@
 
 #define MEDIATOR_SYSLOG_NAME "mediator"
 #define MEDIATOR_LOCK_FILE "/var/lock/mediator.lock"
+#define MEDIATOR_DEFAULT_CONFIG_FILE "/etc/ngcp-mediator/ngcp-mediator.conf"
 #define MEDIATOR_DEFAULT_DAEMONIZE 0
 #define MEDIATOR_DEFAULT_DUMPCDR 0
 #define MEDIATOR_DEFAULT_PIDPATH "/var/run/mediator.pid"