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
Local Office Remote Office
IP-PT Extn. 101 IP-PT Extn. 102 IP-PT Extn. 103 IP-PT Extn. 104
IP-PT IP Address 192.168.0.101 192.168.0.102 10.75.0.103 10.75.0.104
Subnet Mask Address 255.255.255.0 255.255.255.0
Default Gateway Address 192.168.0.1 10.75.0.1
PBX IP Address 192.168.0.100
VLAN ID 1
DiffServ (DS) 0.0
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
Not recommended
• Internet (including an Internet VPN)
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.
Information about IP Proprietary Telephones 7
1.2.2 Using IP Proprietary Telephones on Local and Remote Office LANs
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