Voip - A practical guide for the non-telephone engineer by Joe Yeung
English | 2015 | ISBN: 1326260634 | 176 Pages | EPUB | 3.91 MB
English | 2015 | ISBN: 1326260634 | 176 Pages | EPUB | 3.91 MB
This is a practical guide for business and It managers on implementing a Voice over Ip telephone system