Network Parameters
To use IP-PTs at the remote office, you will need to have the IP addressing and QoS information described
in "1.2.1 Using IP Proprietary Telephones on a Local Office LAN".
Parameter
IP-PT IP Address
Subnet Mask Address
Default Gateway Address
PBX IP Address
VLAN ID
DiffServ (DS)
Types of IP Network
When using IP-PTs over LANs at different locations, first confirm the type of IP network connecting the LANs.
The speech quality depends on the type of IP network in use. Managed IP networks provide better speech
quality compared to unmanaged networks such as the Internet, where quality of service cannot be guaranteed.
Examples of recommended IP networks
•
Digital Leased Line
•
IP-VPN (Virtual Private Network)
•
Frame Relay
Note
Unlike an IP-VPN, which is set up over a network provider's own IP network, an Internet VPN is set up
over the Internet. Internet VPNs are not recommended for IP-PT communication because transmission
delays and loss of data are likely to occur.
1.2.2 Using IP Proprietary Telephones on Local and Remote Office LANs
Local Office
IP-PT Extn. 101
IP-PT Extn. 102
192.168.0.101
192.168.0.102
255.255.255.0
192.168.0.1
IP-PT Extn. 103
10.75.0.103
192.168.0.100
1
0.0
Not recommended
•
Internet (including an Internet VPN)
Information about IP Proprietary Telephones
Remote Office
IP-PT Extn. 104
10.75.0.104
255.255.255.0
10.75.0.1
7