diff --git a/modules/tm/config.c b/modules/tm/config.c
index ffa3892..3303560 100644
--- a/modules/tm/config.c
+++ b/modules/tm/config.c
@@ -66,6 +66,7 @@ struct cfg_group_tm	default_tm_cfg = {
 	MAX_NONINV_LIFETIME,	/* tm_max_noninv_lifetime */
 	1,	/* noisy_ctimer */
 	1,	/* tm_auto_inv_100 */
+	"trying -- your call is important to us",	/* tm_auto_inv_100_r */
 	500,	/* tm_unix_tx_timeout -- 500 ms by default */
 	1,	/* restart_fr_on_each_reply */
 	0,	/* pass_provisional_replies */
@@ -126,6 +127,8 @@ cfg_def_t	tm_cfg_def[] = {
 		"will be always replied"},
 	{"auto_inv_100",	CFG_VAR_INT,	0, 1, 0, 0,
 		"automatically send 100 to an INVITE"},
+	{"auto_inv_100_reason",	CFG_VAR_STRING,	0, 0, 0, 0,
+		"reason text of the automatically send 100 to an INVITE"},   
 	{"unix_tx_timeout",	CFG_VAR_INT,	0, 0, 0, 0,
 		"Unix socket transmission timeout, in milliseconds"},
 	{"restart_fr_on_each_reply",	CFG_VAR_INT,	0, 1, 0, 0,
diff --git a/modules/tm/config.h b/modules/tm/config.h
index cf2227d..c2936ea 100644
--- a/modules/tm/config.h
+++ b/modules/tm/config.h
@@ -111,6 +111,7 @@ struct cfg_group_tm {
 	unsigned int	tm_max_noninv_lifetime;
 	int	noisy_ctimer;
 	int	tm_auto_inv_100;
+	char	*tm_auto_inv_100_r;	
 	int	tm_unix_tx_timeout;
 	int	restart_fr_on_each_reply;
 	int	pass_provisional_replies;
diff --git a/modules/tm/doc/params.xml b/modules/tm/doc/params.xml
index 2fc1723..1b61a59 100644
--- a/modules/tm/doc/params.xml
+++ b/modules/tm/doc/params.xml
@@ -332,8 +332,8 @@ modparam("tm", "restart_fr_on_each_reply", 0)
 		Default value is 1 (on).
 	</para>
 	<para>
-		See also:
-				<function>t_set_auto_inv_100()</function>.
+		See also: <function>t_set_auto_inv_100()</function>
+				  <varname>auto_inv_100_reason</varname>. 
 	</para>
 	<example>
 		<title>Set <varname>auto_inv_100</varname> parameter</title>
@@ -345,6 +345,27 @@ modparam("tm", "auto_inv_100", 0)
 	</example>
 	</section>
 
+	<section id="auto_inv_100_reason">
+	<title><varname>auto_inv_100_reason</varname> (string)</title>
+	<para>
+		Set reason text of the automatically send 100 to an INVITE.
+	</para>
+	<para>
+		Default value is "trying -- your call is important to us".
+	</para>
+	<para>
+		See also: <varname>auto_inv_100</varname>.
+	</para>
+	<example>
+		<title>Set <varname>auto_inv_100_reason</varname> parameter</title>
+		<programlisting>
+...
+modparam("tm", "auto_inv_100_reason", "Trying")
+...
+	    </programlisting>
+	</example>
+	</section>
+
 	<section id="unix_tx_timeout">
 	<title><varname>unix_tx_timeout</varname> (integer)</title>
 	<para>
diff --git a/modules/tm/t_funcs.c b/modules/tm/t_funcs.c
index 5f62f0e..f07b002 100644
--- a/modules/tm/t_funcs.c
+++ b/modules/tm/t_funcs.c
@@ -324,7 +324,7 @@ int t_relay_to( struct sip_msg  *p_msg , struct proxy_l *proxy, int proto,
 	{
 		DBG( "SER: new INVITE\n");
 		if (!t_reply( t, p_msg , 100 ,
-			"trying -- your call is important to us"))
+			cfg_get(tm, tm_cfg, tm_auto_inv_100_r)))
 				DBG("SER: ERROR: t_reply (100)\n");
 	} 
 
diff --git a/modules/tm/tm.c b/modules/tm/tm.c
index ecb42ed..538e683 100644
--- a/modules/tm/tm.c
+++ b/modules/tm/tm.c
@@ -90,7 +90,8 @@
  *               t_relay_to_{udp,tcp,tls}(<no param>) (force protocol, but 
  *               forward to uri)  (andrei)
  *  2008-08-11  sctp support: t_relay_to_sctp, t_replicate_sctp,
- *               t_forward_nonack_sctp (andrei
+ *               t_forward_nonack_sctp (andrei)
+ *  2009-03-18  added a new param: auto_inv_100_reason (aheise) 
  */
 
 
@@ -425,6 +426,7 @@ static param_export_t params[]={
 	{"max_noninv_lifetime", PARAM_INT, &default_tm_cfg.tm_max_noninv_lifetime},
 	{"noisy_ctimer",        PARAM_INT, &default_tm_cfg.noisy_ctimer          },
 	{"auto_inv_100",        PARAM_INT, &default_tm_cfg.tm_auto_inv_100       },
+	{"auto_inv_100_reason", PARAM_STRING, &default_tm_cfg.tm_auto_inv_100_r  },    
 	{"unix_tx_timeout",     PARAM_INT, &default_tm_cfg.tm_unix_tx_timeout    },
 	{"restart_fr_on_each_reply", PARAM_INT,
 									&default_tm_cfg.restart_fr_on_each_reply},
