--- chan_sip.c.42802	2006-09-12 08:17:28.000000000 +0800
+++ chan_sip.c	2006-09-12 08:17:59.000000000 +0800
@@ -3678,6 +3678,12 @@
 			ast_log(LOG_DEBUG, "This channel will not be able to handle video.\n");
 	}
 
+if( i->jointcapability > 0 )
+{
+fmt = i->jointcapability;
+tmp->nativeformats=i->jointcapability;
+}
+
 
 	if (title)
 		 ast_string_field_build(tmp, name, "SIP/%s-%08x", title, (int)(long) i);