ZyXEL P-2302R Bedienungsanleitung PDF herunterladen (Seite 108)

P-2302R Series User’s Guide

107 Chapter 8 VoIP Screens

The following table describes the labels in this screen.

Table 23 VoIP Advanced

LABEL DESCRIPTION

Advanced VoIP

Settings

This read-only field displays the number of the SIP account that you are

configuring. The changes that you save in this page affect the Prestige’s settings

with the SIP account displayed here.

SIP Server

Settings

URL Type Select SIP to have the Prestige include the domain name with the SIP number in

the SIP messages that it sends. Select TEL to have the Prestige use the SIP

number without a domain name in the SIP messages that it sends.

Expiration

Duration

This field sets how long an entry remains registered with the SIP register server.

After this time period expires, the SIP register server deletes the Prestige’s entry

from the database of registered SIP numbers. The register server can use a

different time period. The Prestige sends another registration request after half of

this configured time period has expired.

timer

Use this field to set how long the Prestige waits before sending a repeat

registration request if a registration attempt fails or there is no response from the

registration server.

Session Expires Use this field to set the longest time that the Prestige will allow a SIP session to

remain idle (without traffic) before dropping it.

Min-SE When two SIP devices negotiate a SIP session, they must negotiate a common

expiration time for idle SIP sessions. This field sets the shortest expiration time that

the Prestige will accept. The Prestige checks the session expiration values of

incoming SIP INVITE requests against the minimum session expiration value that

you configure here. If the session expiration of an incoming INVITE request is less

than the value you configure here, the Prestige negotiates with the other SIP

device to increase the session expiration value to match the Prestige’s minimum

session expiration value.

RTP Port Range Real time Transport Protocol is used to handle voice data transfer. Use these fields

to configure the Prestige’s listening port range for RTP traffic. Leave these fields

set to the defaults if you were not given a range of RTP ports to use.

From Type the beginning of the listening port range.

To Type the end of the listening port range.

Voice

Compression

Preferred

Compression

Type

Use this field to select the type of voice coder/decoder (codec) that you want the

Prestige to use. G.711 provides higher voice quality than G.729 but requires

64kbps of bandwidth while G.729 only requires 8kbps.

Select G.711>G.729 if you want the Prestige to first attempt to use the G.711

codec and then the G.729 codec if the peer is not set up to use G.711.

Select G.711 only if you want the Prestige to only use the G.711 codec when

making VoIP calls. You will not be able to connect to a peer that is not set up to use

G.711.

Select G.729>G.711 if you want the Prestige to first attempt to use the G.729

codec and then the G.711 codec if the peer is not set up to use G.729.

Select G.729 only if you want the Prestige to only use the G.729 codec when

making VoIP calls. You will not be able to connect to a peer that is not set up to use

G.729.

STUN

Active Check this box if there is a NAT router between the Prestige and the voice service

provider’s SIP server AND if the NAT router is not a SIP ALG.

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