$two_line_poly_ext = <<<EOF
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <reginfo>
    <reg reg.1.lineKeys="2" reg.1.callsPerLineKey="1" reg.1.displayName="%s"
     reg.1.address="%s" reg.1.label="%s" reg.1.auth.userId="%s"
     reg.1.auth.password="%s"/>
  </reginfo>

  <PHONE_CONFIG>
    <OVERRIDES reg.1.ringType="6"/>
  </PHONE_CONFIG>
EOF;