Dialogic 4000 SERIES Manual de usuario descargar pdf (Pagina 59)

Dialogic® Diva® SIPcontrol™ Configuration

Page 59

Registrations

SIP devices can communicate directly if the URL of both devices is known, but in general, SIP gateways are used

in a network to enable functionalities such as routing, registration, authentication, and authorization.

Registration at a registrar server can be useful because in many cases, only the SIP address of a user is known

but the location (SIP address of the device) is unknown or can change. A registrar server keeps track of the

location of user agents from which the registrar server has received REGISTER requests. Thus, only the SIP

address of the user needs to be sent to the registrar server, which then returns one or more contact addresses

for the user.

If Diva SIPcontrol is configured to use a registrar server, it registers with the server as soon as it is active. Thus,

all local addresses configured for registration are registered with the server. You can use either a private registrar

service or a public registrar server.

To configure a registrar server, open the Registrations section and click the Add button. To change the settings,

click the Details button on the right hand side. To open the online help for a specific parameter, click the

parameter, and a window with the help text will appear.

You can configure the following parameters when you create or modify a registration:

Support

comfort noise

payload:

If you enable this parameter and VAD is configured for the codec used for the call, periods of silence

will be replaced by sending a special "comfort noise" signal to the SIP peer. This allows a supporting

SIP device to generate appropriate artificial background noise in order to remove the impression of

the call being interrupted.

If the SIP peer does not support this type of event, this setting has no effect.

Noise

suppressor:

Enable this parameter if you want to use the noise suppressor functionality.

Echo canceller: If you enable this parameter, the audio echo canceller is active for calls to or from the PSTN.

Transmit as

RTP event:

This option enables DTMF and fax tones to be sent and received as RTP events instead of audio signals.

Automatic

payload type:

G.726, iLBC, and DTMF have a dynamic RTP payload. If you enable this option, Diva SIPcontrol sets

the values automatically. If the endpoint cannot handle the automatically set value, enter it manually

under Manual payload type value.

Manual

payload type

value:

Some endpoints expect a certain payload type value. You can enter any value between 96 and 127.

In calls from SIP to the PSTN, Diva SIPcontrol uses the value suggested by the endpoint. Generally,

this parameter is left at its default value.

Disable CNG

event:

Select this option to transmit the CNG event as an in-band audio signal instead of an RTP event

according to RFC 4733.

Note: This option is only available if the option Transmit as RTP event is enabled.

Name: Enter a name for the registrar configuration.

Registrar address: Enter the IP address or the hostname of the registrar server.

Registrar port: Enter the port number of the registrar server. Usually, the registrar server is listening on port

5060.

Registrar

protocol:

Select the protocol the registrar server uses.

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