Manual AT-T SYN 248 (page 105 of 116) (English)

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Syn248 Installation and Configuration Guide Back to Contents

Appendixes 104

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 IP address may be assigned from a Dynamic Host Configuration Protocol (DHCP)

server, or set statically to the same subnet, and 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. This IP address is a dynamic assignment; 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. Syn248 defaults to

assuming 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 74. You can assign a static IP address for a Deskset from the

Deskset IP Settings menu. See “IP Settings” on page 80.

Some servers have default settings that limit the number of network IP

addresses assigned to devices on the network. You should log in to your server

to confirm that the IP range is sufficient to accommodate at least one of the

Syn248 devices that you are adding as at least one Syn248 device needs an

assigned IP address to enable WebUI configuration activities. Consult the IT

department if you need help checking the server.

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AT-T SYN 248 Manual

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