<page_title> ERS 3500 and ERS 2500 series </page_title> <section_title> Models </section_title> <table> <cell> 2526T <row_header>  </row_header> </cell> <cell> 2526T-PWR <row_header>  </row_header> <row_header> 2526T </row_header> </cell> <cell> 2550T <row_header>  </row_header> <row_header> 2526T </row_header> <row_header> 2526T-PWR </row_header> </cell> <cell> 2550T-PWR <row_header>  </row_header> <row_header> 2526T </row_header> <row_header> 2526T-PWR </row_header> <row_header> 2550T </row_header> </cell> </table>
ERS 3500 and ERS 2500 series consists of four different ERS 2500 models; the ERS 2526T, ERS 2526T-PWR, ERS 2550T, and the ERS 2550T-PWR.