The IES4005 Series is Zyxel's next-generation MDU (multi-dwelling unit) supporting active or passive fiber uplinks and up to 128 ADSL or 128 VDSL subscribers, or 256 VoIP subscribers with full IPv6 functionality that quickly enables service providers to deploy triple-play services. The Zyxel IES4005 Series can be deployed in basements or in street cabinets to realize fiber-to-the-building or fiber-to-the-curb applications and triple-play services. Service providers can freely choose uplink types to adapt to the existing infrastructures. The Zyxel IES4005 Series also supports bundled services for PSTN network migration to VoIP infrastructure.