Hi, Please help me to configuring my MV-378n. we inserted 4 sim in MV-378n. I want to configure in the following way. if somebody calls to my XXXXXXXXXX to sim1, if its busy, MV378 needs to forward to SIM2. I gone through the provided documentation, but i didnt find the information how to forward the calls, when the particular sim is busy or off or unavailable. this is the information for my gsm voip gateway. Model Type: MV-378n Module Description: GSM:850/900/1800/1900MHz (BG2-W) Firmware Version: Tue Feb 15 09:26:49 2011. Codec Version: Fri Mar 20 17:13:45 2009.