VT2542 Voice Gateway User Guide

33

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Dynamic DNS Client

You can register your voice gateway with a DNS server to access the voice gateway from the Internet using its

host name.

Dynamic DNS Client fields

Field

Description

DDNS Server

Selects a DDNS service provider from the list. A charge may occur, depending on the service

selected.

DDNS Client

Enables or disables the DDNS client feature for the WAN connection. It is disabled by default.

User Name

The user name assigned by the DDNS service provider.

Password

The password assigned by the DDNS service provider.

Domain Name

The dynamic domain name to be registered with the DDNS server.

VT2542 Voice Gateway User Guide

34

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Multicast

Multicasting is a form of limited broadcast. UDP is used to send datagrams to all computers in a host group, one or

more hosts identified by the same destination IP address. The following statements apply to host groups:

•

Anyone can join or leave a host group.

•

There are no restrictions on the host location.

•

There are no restrictions on the number of members that may belong to a host group.

•

A host may belong to multiple host groups.

•

Non-members can send UDP datagrams to the host group.

Multicasting is useful when the same data needs to be sent to more than one device; for example, if one device is

responsible for acquiring data that many other devices need. Using multicasting uses less network bandwidth than

sending the same data to individual devices.

Multicasting also enables you to receive multicast video streams from multicast servers. The voice gateway

supports an Internet Group Management Protocol (IGMP) proxy that handles IGMP messages. When enabled,

the voice gateway acts as a proxy for a LAN host making requests to join and leave multicast groups.

Multicast fields

Field

Description

Enable IGMP

Multicast

Enables an IGMP proxy for multicast messages. The voice gateway acts as a proxy for a LAN

computer requesting to join or leave multicast groups.

VT2542 Voice Gateway User Guide

35

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Static Routing

You can define up to 16 static routes in the voice gateway routing table for specific WAN and LAN subnets.

Static Routing fields

Field

Description

New Destination IP

The network IP address of the subnet. (You can also enter the IP address of each individual

station in the subnet.)

Mask

The network mask of the destination subnet.

Gateway

The IP address of the next hop through which traffic will flow towards the destination subnet.

Metric

Defines the number of hops between the network nodes through which data packets travel. The

default is 0, which means the subnet is directly one hop away on the LAN.

VT2542 Voice Gateway User Guide

36

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Dynamic Routing

Dynamic routing enables you to define dynamic routes using Routing Information Protocol (RIP) to exchange

routing information with other network routers across the WAN (Internet) and LAN interfaces.

Dynamic Routing fields

Field

Description

Enable RIP

Enables RIP. Any RIP-enabled router:

•

Sends automatic update packets containing its routing table periodically (every 30 seconds)

•

Adds, deletes, or modifies routes in its routing table based on periodic updates from other routers

•

Responds to requests for its routing table

Protocol

Sets the RIP version:

• RIP v1 (UDP protocol)

• RIP v2 (multicast protocol)

• RIP v1 compatible (UDP protocol with multicast format)

Routers using RIP v1 or a compatible protocol can communicate with each other, but not to routers

using RIP v2.

Enable

Password

(Optional) RIP v2 enables simple plain-text password-based authentication for RIP packets. It is

disabled if RIP v1 is selected.

Password

The password can have up to 16 characters.

Interface

Normally, when it is enabled on a router, RIP dynamically provides routes on all configured interfaces.

On the VT2542, you can select which routes are distributed through the network:

•

LAN

— Sets the direction in which RIP messages are sent on the LAN interface

•

WAN

— Sets the direction in which RIP messages are sent on the WAN interface

The options for LAN and WAN are:

•

Both — receive and send updates to the routing table to other routers on the interface

•

In — receive but do not send routing updates on that interface

•

Out — send but do not receive routing updates on the interface

•

None — do not send or receive routing updates through the interface

VT2542 Voice Gateway User Guide

37

Overview

Installation

Troubleshooting

Contact

FAQ

Glossary

License

Configuration:

Basic

Advanced

TCP/IP

Wireless

Remote Web Access

Web access control enables you to access the voice gateway remotely over the Web.

Remote Web Access fields

Field

Description

Enable

Enables and disables the remote web access feature.

Remote Network IP

Enter the IP address of the remote host (for example, 10.10.10.1).

Remote Netmask

Enter the subnet mask of the remote host.

Redirect Port

You can enter a port in this field that is different from port 8080. The port you enter is viewed

externally and mapped to port 8080 internally on the voice gateway.