diff --git a/Makefile b/Makefile
index f48dec10..b7144b47 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,11 @@
-# $Id: Makefile,v 1.36 1999/07/12 10:35:25 keil Exp $
+# $Id: Makefile,v 1.37 1999/10/15 15:43:26 keil Exp $
 #
 # Toplevel Makefile for isdn4k-utils
 #
 
 .EXPORT_ALL_VARIABLES:
 
-export I4LVERSION = 3.1beta1
+export I4LVERSION = 3.1beta5
 
 all:	do-it-all
 
diff --git a/doc/Configure.help b/doc/Configure.help
index 34a4605a..d55c9863 100644
--- a/doc/Configure.help
+++ b/doc/Configure.help
@@ -326,6 +326,12 @@ VBOX_TCL
   There are different versions of tcl available.. tcl8.0 is the
   current one.
 
+Use a callid in SUSPEND
+VBOX_SUSPEND_ID
+  If suspending ("park") a call it is possible to assign a id to the
+  suspended call (value is 1). Some ISDN phones don't allow to resume
+  calls with an id.
+
 PPP daemon for syncPPP support
 CONFIG_IPPPD
   Enabling this, builds a special PPP daemon called ipppd which
diff --git a/vbox/.Config.in b/vbox/.Config.in
index 94f0dfcc..78e74b55 100644
--- a/vbox/.Config.in
+++ b/vbox/.Config.in
@@ -6,4 +6,5 @@ string 'PID directory' VBOX_PIDDIR
 string 'Lock directory' VBOX_LOCKDIR
 string 'Documentation directory' VBOX_DOCDIR
 string 'Version of Tcl library to use' VBOX_TCL
+bool 'Use a callid in SUSPEND' VBOX_SUSPEND_ID
 endmenu
diff --git a/vbox/Makefile.in b/vbox/Makefile.in
index 09500153..81cddef1 100644
--- a/vbox/Makefile.in
+++ b/vbox/Makefile.in
@@ -1,5 +1,5 @@
 #
-# $Id: Makefile.in,v 1.20 1998/11/23 09:17:59 fritz Exp $
+# $Id: Makefile.in,v 1.21 1999/10/15 15:43:27 keil Exp $
 
 #----------------------------------------------------------------------------#
 # Things you can change to personalize the Makefile for your own site. Some  #
@@ -108,6 +108,11 @@ VBOX_PIDFILEDIR	= $(PIDFILEDIR)
 VBOX_LCKFILEDIR	= $(LCKFILEDIR)
 VBOX_SPOOLDIR	= $(SPOOLDIR)
 
+ifeq ($(VBOX_SUSPEND_ID),y)
+        VBOX_SUSPEND_DEF := -DVBOX_SUSPEND_VALUE=1
+endif
+
+
 #----------------------------------------------------------------------------#
 # Export variables needed by the other utilities...                          #
 #----------------------------------------------------------------------------#
@@ -131,6 +136,7 @@ export VBOX_PIDFILEDIR
 export VBOX_LCKFILEDIR
 export VBOX_SPOOLDIR
 export VBOX_SYSCONFDIR
+export VBOX_SUSPEND_DEF
 
 #----------------------------------------------------------------------------#
 #                                                                            #
diff --git a/vbox/src/Makefile.in b/vbox/src/Makefile.in
index 3ae458ee..38b31334 100644
--- a/vbox/src/Makefile.in
+++ b/vbox/src/Makefile.in
@@ -1,5 +1,5 @@
 #
-# $Id: Makefile.in,v 1.10 1997/10/22 20:47:03 fritz Exp $
+# $Id: Makefile.in,v 1.11 1999/10/15 15:43:27 keil Exp $
 
 #----------------------------------------------------------------------------#
 # The information below is modified by the configure script when Makefile is #
@@ -41,7 +41,7 @@ script.o:	$(HEADERS) script.c
 		$(CC) $(CFLAGS) -DBINDIR='"$(VBOX_BINDIR)"' -c script.c
 
 voice.o:	$(HEADERS) voice.c
-		$(CC) $(CFLAGS) -c voice.c
+		$(CC) $(CFLAGS) $(VBOX_SUSPEND_DEF) -c voice.c
 
 streamio.o:	$(HEADERS) streamio.c
 		$(CC) $(CFLAGS) -c streamio.c
diff --git a/vbox/src/voice.c b/vbox/src/voice.c
index 4eebea9c..ed6f680a 100644
--- a/vbox/src/voice.c
+++ b/vbox/src/voice.c
@@ -1,5 +1,5 @@
 /*
-** $Id: voice.c,v 1.12 1998/03/26 13:10:39 keil Exp $
+** $Id: voice.c,v 1.13 1999/10/15 15:43:27 keil Exp $
 **
 ** Copyright (C) 1996, 1997 Michael 'Ghandi' Herold
 */
@@ -321,7 +321,12 @@ int voice_put_message(char *message)
 			printstring(line_o, "%c%c", DLE, ETX);
 			modem_raw_write(line_o, strlen(line_o));
 			if (modem_command("", "VCON")>0) {
-				if (modem_command("AT+S1", "OK") <= 0) {
+#ifdef VBOX_SUSPEND_VALUE
+				printstring(line_o, "AT+S%d", VBOX_SUSPEND_VALUE);
+#else
+				printstring(line_o, "AT+S");
+#endif
+				if (modem_command(line_o, "OK") <= 0) {
 					log(L_WARN, "Can't suspend call\n");
 				} else {
 					log(L_INFO, "Call suspended\n");
@@ -533,7 +538,12 @@ int voice_get_message(char *name, char *timestr, int save)
 			modem_raw_write(line_o, strlen(line_o));
 			modem_wait_sequence(line_i);
 			if (modem_command("", "VCON")>0) {
-				if (modem_command("AT+S1", "OK") <= 0) {
+#ifdef VBOX_SUSPEND_VALUE
+				printstring(line_o, "AT+S%d", VBOX_SUSPEND_VALUE);
+#else
+				printstring(line_o, "AT+S");
+#endif
+				if (modem_command(line_o, "OK") <= 0) {
 					log(L_WARN, "Can't suspend call\n");
 				} else {
 					log(L_INFO, "Call suspended\n");