Advice Centre

Telephony Acronymns - click this link to view a dictionary of Telephony acronymns.

Here you will find links to information pages, both on this site and on other web sites, that will help you to solve problems and understand the technology used for business IT and Voice over IP.
IP Networks Fundamentals of packet communication - TCP, UDP etc.
Ports and standard Port Numbers
Firewalls -   General overview,   Hardware Firewalls,   Software Firewalls
Firewalls -  Basic concepts: zones, rules, port forwarding etc.
NAT
Voice over IP: SIP
DNS
Active Directory
Exchange server
IIS Web hosting
SMTP hosting
FTP hosting