Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 49023)
+++ channels/chan_sip.c	(working copy)
@@ -4722,6 +4722,11 @@
 	/* make a duplicate of the string, with two extra characters
 	   at the beginning */
 	boundary = ast_strdupa(search - 2);
+	if (strcasestr(boundary, "\"")) {
+		strncpy(boundary, boundary+1, strlen(boundary));
+		boundary[strlen(boundary)-1] = '\0';
+	}
+		
 	boundary[0] = boundary[1] = '-';
 
 	/* search for the boundary marker, but stop when there are not enough