denphone office ip telephone system asterisk based ip pbx2.pdf · the pbx servers can be linked...
TRANSCRIPT
Denphone telephone systems can be used in a variety of configurations, including mixed environments of new IP phones and older analogue equipment. In a multi-office installation, the PBX Servers can be linked over the internet to create a virtual global phone network. Also the Servers can be connected to IP phone service providers to add overseas in-bound and out-bound calling in locations where there is no physical office. This is achieved through open standards such as SIP and IAX protocol connections. An example architecture is shown below.
#402 Azabu Nagasaka Bldg email: [email protected] 1-4-8 Azabu Juban Minato-ku Tokyo 106-0045 tel: 81-3-5545-4638
Denphone Office IP Telephone System
Tokyo
4 x INS64ISDN lines
Example Denphone Inter-Office Call Routing Architecture
New York
Fractional T1
NTTPhone
Network
TelappliantTo UK Phone
Osaka
1 x INS64ISDN lines Laptop with
VoIP software
Trunk line
Hong Kong
POTSanalogue
lines
INTERNET
PCCWPhone
Network
Office LAN
PC withVoIP software
VerizonPhone
Network
FaxIPPhones
Server
Fax Fax
FaxIP
Phones
Server
Office LAN
IP P
hone
Server
Server
Office LAN
IP P
hone
IP P
hone