Chapter 9 SIP

Each field is described in the following table.

Table 63 VoIP > SIP > SIP Settings > Advanced

LABEL

DESCRIPTION

SIP Account

This field displays the SIP account you see in this screen.

 

 

SIP Server

 

Settings

 

 

 

URL Type

Select whether or not to include the SIP service domain name when the ZyXEL

 

Device sends the SIP number.

 

SIP - include the SIP service domain name

 

TEL - do not include the SIP service domain name

 

 

Expiration

Enter the number of seconds your SIP account is registered with the SIP register

Duration

server before it is deleted. The ZyXEL Device automatically tries to re-register

 

your SIP account when one-half of this time has passed. (The SIP register server

 

might have a different expiration.)

 

 

Register Re-send

Enter the number of seconds the ZyXEL Device waits before it tries again to

timer

register the SIP account, if the first try failed or if there is no response.

 

 

Session Expires

Enter the number of seconds the conversation can last before the call is

 

automatically disconnected. Usually, when one-half of this time has passed, the

 

ZyXEL Device or the other party updates this timer to prevent this from happening.

 

 

Min-SE

Enter the minimum number of seconds the ZyXEL Device accepts for a session

 

expiration time when it receives a request to start a SIP session. If the request has

 

a shorter time, the ZyXEL Device rejects it.

 

 

RTP Port Range

 

 

 

Start Port

Enter the listening port number(s) for RTP traffic, if your VoIP service provider

End Port

gave you this information. Otherwise, keep the default values.

 

To enter one port number, enter the port number in the Start Port and End Port

 

fields.

 

To enter a range of ports,

 

• enter the port number at the beginning of the range in the Start Port field

 

• enter the port number at the end of the range in the End Port field.

 

 

Voice

Select the type of voice coder/decoder (codec) that you want the ZyXEL Device to

Compression

use. G.711 provides higher voice quality but requires more bandwidth (64 kbps).

 

• G.711A is typically used in Europe.

 

• G.711u is typically used in North America and Japan.

 

In contrast, G.729 only requires 8 kbps.

 

The ZyXEL Device must use the same codec as the peer. When two SIP devices

 

start a SIP session, they must agree on a codec.

 

 

Primary

Select the ZyXEL Device’s first choice for voice coder/decoder.

Compression

 

Type

 

 

 

Secondary

Select the ZyXEL Device’s second choice for voice coder/decoder. Select None if

Compression

you only want the ZyXEL Device to accept the first choice.

Type

 

 

 

Third

This field is disabled if Secondary Compression Type is None.

Compression

Select the ZyXEL Device’s third choice for voice coder/decoder. Select None if

Type

you only want the ZyXEL Device to accept the first or second choice.

 

 

 

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P-2302HWUDL-P1 Series User’s Guide