Syn248 Installation and Configuration Guide Back to Contents
Appendixes 119
Appendix B: IP Addresses and Connectivity
An IP address is an individual numeric identification assigned to devices on a computer
network. At least one Syn248 device needs a network-assigned IP address on the subnet
shared with any computers that will allow access to the WebUI. Valid IP addresses on the
same subnet allow devices on the network to identify each other and enable
communication.
This network IP address may be assigned from a Dynamic Host Configuration Protocol
(DHCP) server, or set statically to the same subnet. The network IP address will be
separate from the self-assigned 169.254.xxx.xxx link-local address that the Syn248
devices use to communicate with each other. When setting up the IP address on a
Syn248 device, this network IP address used for WebUI connectivity is the only address
you can change.
The network IP addresses can be assigned in two ways:
1. The Syn248 device can request a network server to automatically assign an IP
address. In a home or small office environment, the server is usually your router. This
IP address is assigned dynamically; the address is on lease from the server. The lease
is renewed as long as the device remains connected and there is no change to the
network. However, if the device is disconnected, or if there is a network or AC power
interruption, the lease may not be renewed (that is, the IP address expires) and a new
IP address may be assigned.
Most LANs use servers to automatically assign IP addresses. By default, Syn248
assumes that this automatic assignment will occur.
2. The Syn248 system administrator can manually assign a static system IP address. This
IP address does not change, even when there are network or AC power interruptions.
Some installations will require manual static IP assignment. You can assign a static
IP address for a Gateway using the device front panel interface. See “Gateway
Configuration” on page 86. You can assign a static IP address for a Deskset from the
Deskset IP Settings menu. See “IP Settings” on page 92.
Some servers have default settings that limit the number of network IP
addresses assigned to devices on the network. You should log on to your
server (in most cases, this will be your router) to confirm that the IP range is
sufficient to accommodate at least one of the Syn248 devices that you are
adding. At least one Syn248 device needs an assigned IP address to enable
WebUI configuration activities.
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