I have 60 QTelNet units in place right now that are forwarding incoming DID calls out to various FXS gateways across the net, I highly reccommend them for their voice quality, ease of set-up and compatibility. I have interfaced them with Ericsson webswitch 100’s and Quintum gear. ( both of these require a bit of advance telnet configuration ). My suggestion, grab a pair of webswitch 100’s of ebay for $230US ( India end ) and get 4 QTelNet FXO’s for the US end.
Gary.