Chapter 9 Voice

Table 58 VoIP > SIP > SIP Service Provider (continued)

LABEL

DESCRIPTION

RFC 3262

RFC 3262 defines a mechanism to provide reliable transmission of SIP

 

provisional response messages, which convey information on the

 

processing progress of the request. This uses the option tag 100rel and

 

the Provisional Response ACKnowledgement (PRACK) method.

 

Select this to have the P-2812HNU-51c include a SIP Require/

 

Supported header field with the option tag 100rel in all INVITE

 

requests. When the P-2812HNU-51c receives a SIP response message

 

indicating that the phone it called is ringing, the P-2812HNU-51c sends

 

a PRACK message to have both sides confirm the message is received.

 

If you select this option, the peer device should also support the option

 

tag 100rel to send provisional responses reliably.

 

 

Bound Interface

 

Name

 

 

 

Bound Interface

If you select LAN or Any_WAN, the P-2812HNU-51c automatically

Name

activates the VoIP service when any LAN or WAN connection is up.

 

If you select Multi_WAN, you also need to select the pre-configured

 

WAN connections. The VoIP service is activated only when one of the

 

selected WAN connections is up.

 

 

Outbound Proxy

 

 

 

Outbound Proxy

Enter the IP address or domain name of the SIP outbound proxy server

Address

if your VoIP service provider has a SIP outbound server to handle voice

 

calls. This allows the P-2812HNU-51c to work with any type of NAT

 

router and eliminates the need for STUN or a SIP ALG. Turn off any SIP

 

ALG on a NAT router in front of the P-2812HNU-51c to keep it from re-

 

translating the IP address (since this is already handled by the

 

outbound proxy server).

 

 

Outbound Proxy

Enter the SIP outbound proxy server’s listening port, if your VoIP

Port

service provider gave you one. Otherwise, keep the default value.

 

 

RTP Port Range

 

 

 

Start Port

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

End Port

provider 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.

 

 

206

 

P-2812HNU-51c User’s Guide