I need SIP client

I need SIP client that have to support this: it's for support center. You can call into it.(receive calls) You can forward calls. Address book connected with FTP that can be configured and downloaded ones per 24hours. The Address Book should read data like: Phonenumber|Name|PersonId|NoMarketing|Street|Street2|Zip|City|Region|Country NoMarketing = true = red X NoMarketing = false = NULL So it would be like this: 8999999|Emma Watson|0000001111|true|Nowhere 1||10153|New York||| Users can search the address book right-click on the number and forward it automatically. Also there should be another FTP list of numbers that can't be forwarded. and it will only by numbers like 5559988