About the Vanguard 3400 Series
1-7
Applications
Figure 1-4. Hosted, SIP-based IP Telephony Application for Small/
Medium Branch Offices
WAN
(IP/MPLS)
PSTN
Fax
Laptop
Main Office
Small/Medium Branch Office
6800 Series
PRI
FXO
3460ASG
Soft Switch
Analog
Phone
IP Telephone