code: public static void removeSipSubcontext(Context envCtx) {
  		try {
  			envCtx.destroySubcontext(SIP_SUBCONTEXT);
  		} catch (NamingException e) {
  			logger.error(sm.getString("naming.unbindFailed", e));
  		}
  	}
docs: Removes the sip subcontext from JNDI
  @param envCtx the envContext from which the sip subcontext should be removed