P-2002 Series User’s Guide

62

Chapter 6 VoIP Screens

The following table describes the labels in this screen. 

Table 13   

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. 

Register Re-send 

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 this field 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.

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

Use STUN if there is a NAT router between the Prestige and the voice service 

provider’s SIP server. 
You do not need to use STUN if the NAT router is also a SIP ALG.

Server Address

Your VoIP service provider must host a STUN server in order for you to use STUN. 

Type the IP address of the STUN server in this field.