The specs for the DVG-3004S can be found on the following link: ftp://ftp10.dlink.com/pdfs/products/DVG-3004S/DVG-3004S_ds.pdf
I would like to know how I can use this equipment with the Cisco Catalyst 500-24PC Express and what benefits I will derive from the use, also if I intend to incorporate Asterisk with it.