sftp on unixware 711 doesnt have -b option

I installed openssh on 711 to gain ssh and sftp. When i type sftp (installed in /usr/local/bin) i get the following available options
usage: sftp [-1vC] [-osshopt=value] [user@]host

which isnt what i expect. I expect the full implementation :

sftp [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]
[-o ssh_option] [-P sftp_server_path] [-R num_requests] [-S program]
[-s subsystem | sftp_server] host
sftp [[user@]host[:file [file]]]
sftp [[user@]host[:dir[/]]]
sftp -b batchfile [user@]host

and of course i dont have a -b option for non-interactive sftp ?

any ideas?
cheers
neil