| Outbound Proxy |
| IP address or Domain name of Outbound Proxy, Media Gateway, or Session | |
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| Border Controller. Used for firewall or NAT penetration in different network | |
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| environment. If the system detects symmetric NAT, STUN will not work. ONLY | |
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| outbound proxy can provide solution for symmetric NAT. | |
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| SIP User ID |
| User account information provided by VoIP service provider (ITSP); either an | |
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| actual phone number or formatted like one. | |
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| Authenticate ID |
| SIP service subscriber’s Authenticate ID used for authentication. It can be | |
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| identical to or different from SIP User ID. | |
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| Authenticate Password |
| SIP service subscriber’s account password for GXP to register to (SIP) servers of | |
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| ITSP. | |
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| Name |
| SIP service subscriber’s name that is used for Caller ID display. | |
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| Use DNS SRV: |
| Default is No. If set to “Yes”, the client will use DNS SRV to look up server. | |
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| User ID is Phone |
| If the phone has an assigned PSTN telephone number, this field should be set to | |
| Number |
| “Yes”. Otherwise, set it to “No”. If “Yes” is set, a “user=phone” parameter will be | |
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| attached to the “From” header in SIP request | |
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| SIP Registration |
| This parameter controls sending REGISTER messages to the proxy server. The | |
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| default setting is “Yes”. | |
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| Default is No. If set to “Yes”, the SIP user’s registration information will be |
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| cleared on reboot. | |
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Register Expiration
This parameter allows user to specify the time frequency (in minutes) that GXP refreshes its registration with the specified registrar. The default interval is 60 minutes. The maximum interval is 65,535 minutes (about 45 days).
| Local SIP Port |
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| This parameter defines the local SIP port used to listen and transmit. The default | |||
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| value for Account 1 is 5060. It is 5062, 5064, 5066 for Account 2, Account 3 and | ||
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| Account 4 respectively. |
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| SIP Registration Failure |
| Retry registration if the process failed. Default is 20 seconds. | ||
| Retry Wait Time |
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| SIP T1 Timeout |
| RFC 3261 SIP T1 timer. Default is 1 second. |
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| SIP T2 Interval |
| RFC 3261 SIP T2 timer. Default is 0.5 seconds. |
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| SIP Transport |
| Choose SIP Transport between UDP and TCP. Default is UDP. | ||
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| Use RFC3581 |
| This option allows a SIP client to request that the server send the response back | ||
| Symmetric Routing |
| to the source IP address and port from which the request originated. | ||
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| NAT Traversal (STUN) |
| This parameter activates the NAT traversal mechanism. If activated (by choosing | ||
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| “Yes”) and a STUN server is also specified, the phone performs according to the | ||
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| STUN client specification. Using this mode, the embedded STUN client detects if | ||
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| and what type of NAT/Firewall configuration is used. If the detected NAT is a Full | ||
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| Cone, Restricted Cone, or a | ||
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| public IP address and port in all of its SIP and SDP messages. If the NAT | ||
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| Traversal field is set to “Yes” with no specified STUN server, the GXP will | ||
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| periodically (every 20 seconds or so) send a blank UDP packet (with no payload | ||
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| data) to the SIP server to keep the “hole” on the NAT open. | ||
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Grandstream Networks, Inc. |
| GXP User Manual | Page 32 of 38 | ||
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| Firmware 1.1.5.15 | Last Updated: 12/2007 | |