User Guide
Page 29
... join conference calls by dialing a conference room extension. • Use call in the figure) use VoIP and local calls (to D) use PSTN or ISDN. • Auto attendant menu systems act as automatic switchboard operators to help route incoming calls to the proper extension. • Customers...services. 1.1.3.1 All-in the diagram). • Multiple WAN gives fail-over protection for VPN connections and VoIP. 1.1.3.2 DMZ Installation Use the ISG50 with a USG, ZyXEL's Unified Threat Management (UTM) firewall to add more security services like B) use Web services such as Click To Talk, Skype, or ...
... join conference calls by dialing a conference room extension. • Use call in the figure) use VoIP and local calls (to D) use PSTN or ISDN. • Auto attendant menu systems act as automatic switchboard operators to help route incoming calls to the proper extension. • Customers...services. 1.1.3.1 All-in the diagram). • Multiple WAN gives fail-over protection for VPN connections and VoIP. 1.1.3.2 DMZ Installation Use the ISG50 with a USG, ZyXEL's Unified Threat Management (UTM) firewall to add more security services like B) use Web services such as Click To Talk, Skype, or ...