All, Our multilingual extensions now include SPICE (Berkley Spice), IBIS-ISS (HSPICE subset), VHDL-AMS and Verilog-AMS. In general, Users will need to simulate channels with models from multiple vendors (also including the legacy IBIS Model "B" element). This will include simulations that have combinations of IBIS-ISS, VHDL-AMS and Verilog-AMS (I ignore SPICE since it is essentially a subset of IBIS-ISS). My research on the WEB indicates: Synopsis supports IBIS-ISS, Verilog Mentor supports IBIS-ISS, Verilog, VHDL Cadence supports IBIS-ISS, Verilog, VHDL Agilent supports IBIS-ISS, Verilog Ansys supports IBIS-ISS, Verilog Is this correct? Walter Walter Katz <mailto:wkatz@xxxxxxxxxx> wkatz@xxxxxxxxxx Phone 303.449-2308 Mobile 303.335-6156