diff --git a/README b/README
index d109f9c..c81c7eb 100644
--- a/README
+++ b/README
@@ -72,7 +72,11 @@ This chan_capi version includes:
  
   Now it is:      Dial(CAPI/g<group>/[b|B]<destination>)
   Or:             Dial(CAPI/contr<controller>/[b|B]<destination>)
- 
+
+  'group' can be a value, comma separated list of values or a range
+  using '-'. The according interface is found by searching a match with
+  the 'group' specified in the capi.conf for each interface.
+
   CLIP/CLIR now uses the calling presentation of the calling channel, which can
   be modified using the CallingPres() application. Use CallingPres(32) for CLIR.
   That is why the msn= param in capi.conf is now obsolete. The callerID is also
diff --git a/chan_capi.c b/chan_capi.c
index c5ff758..40587ae 100644
--- a/chan_capi.c
+++ b/chan_capi.c
@@ -1350,7 +1350,7 @@ struct ast_channel *capi_request(char *type, int format, void *data)
 
 	if (((char *)interface)[0] == 'g') {
 		interface++;
-		capigroup = atoi(interface);
+		capigroup = ast_get_group(interface);
 		cc_ast_verbose(1, 1, VERBOSE_PREFIX_3 "capi request group = %d\n",
 				capigroup);
 	} else if (!strncmp(interface, "contr", 5)) {
@@ -1382,7 +1382,7 @@ struct ast_channel *capi_request(char *type, int format, void *data)
 			foundcontroller = controller;
 		} else {
 			/* DIAL(CAPI/gX/...) */
-			if (!(i->group & (1 << capigroup))) {
+			if (!(i->group & capigroup)) {
 				/* keep on running! */
 				ast_mutex_unlock(&contrlock);
 				continue;