Chapter 11 Voice

 

Table 62 VoIP > SIP Settings > Advanced

 

LABEL

DESCRIPTION

 

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 ZyXEL Device lets a SIP session remain idle

 

 

(without traffic) before it automatically disconnects the session.

 

 

 

 

Min-SE

Enter the minimum number of seconds the ZyXEL Device lets a SIP session

 

 

remain idle (without traffic) before it automatically disconnects the session. When

 

 

two SIP devices start a SIP session, they must agree on an expiration time for idle

 

 

sessions. This field is the shortest expiration time that the ZyXEL Device accepts.

 

 

 

 

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.

 

 

G.726 operates at 16, 24, 32 or 40 kbps.

 

 

By 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

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

 

Compression

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

 

Type

 

 

 

 

 

DTMF Mode

Control how the ZyXEL Device handles the tones that your telephone makes

 

 

when you push its buttons. You should use the same mode your VoIP service

 

 

provider uses.

 

 

RFC 2833 - send the DTMF tones in RTP packets.

 

 

PCM - send the DTMF tones in the voice data stream. This method works best

 

 

when you are using a codec that does not use compression (like G.711). Codecs

 

 

that use compression (like G.729 and G.726) can distort the tones.

 

 

SIP INFO - send the DTMF tones in SIP messages.

 

 

 

 

Outbound Proxy

 

 

 

 

 

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P-2602HWLNI User’s Guide