If you don't have cosessions software I think you will have to contact NEC. However I've never seen an AD40 as they don't appear to be on sale down here. AD8 is about the biggest we get. Thing is if you ask NEC nicely and they have the modem number they will probably do a time change free of charge, it only takes a few seconds and one telephone call. If you know the "RDA" number for the VM then even if they didn't have the number and you can supply it they will probably change it FOC. A happy customer is worth more than the cost of raising the invoice. Be nice to them and they will probably be nice to you, Why would you pi$$ of a customer for such a small job.