We have a line dedicated to ADSL except for once a fortnight when we disconnect the ADSL modem and connect a 56k modem to transmit payroll to the bank using the bank's ancient DOS Telix-like comms program which uses Kermit as the protocol. We have the in-line filter supplied by the ADSL ISP but never used (Alcaltel Speed Touch). The ISP says we can use this on the modem line so we can use both simultaneously but I have my doubts and we never got ADSL and a fax machine to coexist using the same filter a year ago. These filters were I believe intended where the ADSL line is also used for voice, not a secondary data transmission application. Will the filter let ADSL and Kermit co-exist peacefully?