Compare Adtran ISU™ 512 Multiplexer (1202086L1) to Adtran ATLAS™ 800 (1200185L3) Multiplexer

The ADTRAN ISU 512 is a standalone ISDN Service Unit that connects data terminal equipment (DTE) to the ISDN network. The ISU 512 is specifically designed as a low-cost solution for applications such as video-conferencing, T1 backup, LAN/WAN connectivity, and high-speed file transfer.? ?The ISU 512 is designed as a cost-effective inverse multiplexer for 384 kbps videoconferencing. Some video-conferencing products operate in a dual port mode. The ISU 512 is designed to operate in a dual port mode making it backward compatible with videoconferencing systems utilizing two Switched 56 DSUs or a dual port ISDN terminal adapter. The ISU 512 connects directly to the ISDN network using up to four Basic Rate ISDN (BRI) lines. By terminating four BRI circuits, the ISU 512 can create an aggregate bandwidth of up to 512 kbps which can be used to backup a T1 circuit. Since ISDN is a switched digital service, bandwidth can be established and utilized on an as needed basis. Therefore, the ISU 512... Less

The Quad T1/PRI module combines with other ATLAS components to implement a variety of WAN access products, including a T1 Bandwidth Manager, an ISDN Access Switch, and a Digital Access Cross-Connect System (DACS). The module provides four network ports, each of which can be independently configured to operate in T1 (DS-1 or DSX-1) or Primary Rate ISDN (PRI) modes. ??The Quad T1/PRI module can perform T1 to PRI conversion, translating between the robbed-bit signaling presented in a channelized T1 circuit and the D-channel signaling of a PRI circuit. When using the Quad T1/PRI module, ATLAS operates in a DACS mode supporting DS0 time slot interchange and DS0 grooming while preserving robbed bit signaling. ATLAS can be fully populated with Quad T1/PRI modules to support a pure DACSing application of 34 T1 circuits. Configuration of the Quad T1/PRI module can be accomplished through a variety of mechanisms, including Telnet or VT 100 Emulation. SNMP management is supported for alarm an... Less