TVP-221H User’s Guide

26

Dynamic DNS

It allows Internet users to connect to your gateway using a static URL, rather than an IP

Address. This is particularly useful because a dynamic IP address, by definition, is

constantly changing making it difficult for internet users to find you.

The Service works as follows:

1.

Obtain a free account for the service by registering at

.

2.

www.dyndns.org will automatically notify you confirming your account

information.

3.

Return to

and use the "Create New Host" option to register

your preferred Domain name. It is recommended that you register a name within

the xxxx.dyndns.org hostname.

4.

Details of your

account (Name, password, Domain name)

must then be entered and saved in the DDNS page of the TVP-221H. The TVP-

221H will then automatically notify DynDNS of your changing IP Address and

DynDNS will in turn, map it to your registered Domain Name. Internet users will

now be able to easily connect to your Virtual Servers (or DMZ PC) using your

easy to remember Domain name.

Dynamic DNS Screen

Select

Internet

on the main menu, then

Dynamic DNS

, to see a screen like the following:

Figure 1: DDNS Screen

TVP-221H User’s Guide

Data - Dynamic DNS Screen

DDNS Service

DDNS Service

You must register for the service at dyndns.org.

Apply for a Domain Name, and ensure it is allocated to you.

Details of your DDNS account (Name, password, Domain name)

must then be entered and saved on this screen.

This device will then automatically ensure that your current IP

Address is recorded by the DDNS Service Provider. (You do

NOT need to use the "Client" program provided by some DDNS

Service providers.)

From the Internet, users will now be able to connect to your Virtual

Servers (or DMZ PC) using your Domain name.

DDNS Data

Dyn DNS

On/Off

User Name

Enter your Username for the DDNS Service.

Password/Key

Enter your current password for the DDNS Service.

Domain Name

(Hostname)

Enter the domain (hostname) name registered at

www.dyndns.org

.

For instance, if you registered johnsmith.dyndns.org,

please enter

johnsmith

DDNS Status

This message is returned by the DDNS Server

Normally, this message should be something like "Update

successful" or "IP address updated".

If the message indicates some problem, you need to connect to the

DDNS Service provider and correct this problem.

4.3

H.323 Configuration

H.323 Status Page

This page lists all current settings for H.323 Parameters.

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TVP-221H User’s Guide

H.323 Parameters

For the most part end users will not be using these functions / features and / or

should use the default settings.

For more information please see the Advanced

User Manuals or consult with your Systems Integrator

1.

Display Name:

The default string is “Customer”.

This field is to set the display name information that is carried in the

H.323 setup messages. Up to 48 characters can be entered.

2.

Terminal Type

: The default value is 60.

This field is to set the H.245 terminal type, which is used as part of the

master/slave determination process of H.245. Typically, setting a value of

less than 50 will force slave operation, and a value of greater than 200 will

force the master operation. For more details, please refer to H.323-related

standard documents.

3.

RTP Port Base

: The default value is 30000.

This field is to select the starting port number for assignment of RTP and

RTCP ports. According to the H.323 specification, RTP port number

should be even in value, and the RTCP port number should be one greater

than the RTP port.

Typically, numbers from 0 to 1023 are reserved on

most systems.

4.

Outgoing Fast Start

: The default setting is off.

This field is to enable or disable the Fast start mode on the outgoing side

of the link.

5.

Incoming Fast Start

: The default setting is off.

This field is to enable or disable the Fast start mode on the incoming side

of the link.

You'll have to reboot the system to make your changes active!

Frame Rate = 2 frames/packet

6.

Auto-Answer

: Enables quick H.225 to H.245 transition without waiting

for receiver picking up the phone, default is on

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TVP-221H User’s Guide

7.

NAT Call Mode

: Enables calls from remote sites which use NAT routers

with private IP networks behind, default is on

8.

Default DTMF Mode

: H323 V2 Signal or IMTC. The default is H323 V2

Signal

9.

DNS IP Address

10.

Alternate DTMF IP Address

11.

DTMF Duration

: default is 300

Gatekeeper

This page is home to many specific H.323 Gateway / Gatekeeper functions /

features. For the most part end users will not be using these functions /

features and / or should use the default settings.

For more information please

see the Advanced User Manuals or consult with your Systems Integrator

The primary function of the gatekeeper component is to provide address

translation services. This function converts external (telephone number)

addresses and alias (name) addresses to network addresses, allowing users to

maintain the same telephone numbers or alias addresses regardless of changes

to their network addresses.

1.

Gate Keeper Mode: The default setting is off.

This field is to select the

co-operation mode with some other gatekeeper(s). Three options are

available:

i.

Off: Disables gatekeeper co-operation,

ii.

Auto: Enables auto-discovery of the gatekeeper

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TVP-221H User’s Guide

30

iii.

Manual: Enables gatekeeper co-operation in manual

operation (the gatekeeper address must be properly

assigned).

The following fields must be filled in when Gate Keeper Mode is set to

manual.

2.

Gate Keeper Address

: Specify the gatekeeper address when configured

to manual mode. When auto mode is desired, this field should be set to

auto

3.

Allow Calls Without Gate Keeper

: This field is to inform the H.323

stack to allow calls when the endpoint is not registered with a gatekeeper.

4.

Registration Type

: This field is to set the endpoint registration type.

This specifies how the endpoint will register itself with the gatekeeper.

5.

Max Registration Retries

: This field is to control how many registration

attempts will be made before the endpoint considers itself to have failed

registration.

6.

Time To Live

: Do not have to set this because GK to perform this

function. Every x seconds will check to see if it is alive

7.

Endpoint Prefix

: This command is used to set the H.323 prefix that the

TVP-221H uses when registering to an H.323 gatekeeper.

8.

Terminal ID

: To specify GW’s ID.

9.

GateKeeper ID

: To specify Gate Keeper’s ID.

You'll have to

reboot

the system to make your changes take effect!