P-2302HW/HWL-P1 Series User’s Guide

Each field is described in the following table.

Table 61 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 gave

End Port

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.

 

Note: In order to use the VoiP trunking feature you must set the

 

Primary Compression Type to G.729.

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 Type

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

Third

This field is disabled if Secondary Compression Type is None.

Compression Type

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

 

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

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Chapter 9 SIP