--- /var/tmp/portage/asterisk-1.0.8/work/asterisk-1.0.8/pbx/pbx_spool.c	2005-04-02 19:41:19.000000000 +0200
+++ /root/pbx_spool.c	2005-07-01 12:16:49.000000000 +0200
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <math.h> // pow()
 #include "../astconf.h"
 
 /*
@@ -50,6 +51,10 @@
 	int retrytime;
 	/* How long to wait for an answer */
 	int waittime;
+
+	/* How the retrytime interval should change between retries */
+	int mfactor;
+
 	/* PID which is currently calling */
 	int callingpid;
 	
@@ -85,6 +90,7 @@
 	o->priority = 1;
 	o->retrytime = 300;
 	o->waittime = 45;
+	o->mfactor = 1;
 }
 
 static int apply_outgoing(struct outgoing *o, char *fn, FILE *f)
@@ -159,6 +165,11 @@
 							ast_log(LOG_WARNING, "Invalid retrytime at line %d of %s\n", lineno, fn);
 							o->waittime = 45;
 						}
+					} else if (!strcasecmp(buf, "mfactor")) {
+						if ((sscanf(c, "%d", &o->mfactor) != 1) || (o->mfactor < 1)) {
+							ast_log(LOG_WARNING, "Invalid mfactor at line %d of %s\n", lineno, fn);
+							o->mfactor = 1;
+            }
 					} else if (!strcasecmp(buf, "retry")) {
 						o->retries++;
 					} else if (!strcasecmp(buf, "startretry")) {
@@ -188,6 +199,7 @@
 		ast_log(LOG_WARNING, "At least one of app or extension must be specified, along with tech and dest in file %s\n", fn);
 		return -1;
 	}
+	o->retrytime = o->retrytime * pow(o->mfactor, o->retries);
 	return 0;
 }