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 |
| Supported header field with the option tag 100rel in all INVITE |
| requests. When the |
| indicating that the phone it called is ringing, the |
| 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. |
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Bound Interface |
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Name |
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Bound Interface | If you select LAN or Any_WAN, the |
Name | activates the VoIP service when any LAN or WAN connection is up. |
| If you select Multi_WAN, you also need to select the |
| WAN connections. The VoIP service is activated only when one of the |
| selected WAN connections is up. |
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Outbound Proxy |
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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 |
| router and eliminates the need for STUN or a SIP ALG. Turn off any SIP |
| ALG on a NAT router in front of the |
| translating the IP address (since this is already handled by the |
| outbound proxy server). |
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|
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. |
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RTP Port Range |
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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. |
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