Grandstream Networks GXW410X User Manual download pdf (Page 27)

SIP Server

SIP Server’s IP address or Domain name provided by VoIP service provider.

Outbound Proxy

IP address or Domain name of Outbound Proxy, or Media Gateway, or Session Border

Controller. Used by GXW410x for firewall or NAT penetration in different network

environments. If symmetric NAT is detected, STUN will not work and ONLY outbound proxy

can correct the problem.

Use DNS SRV:

Default is No. If set to Yes the client will use DNS SRV to look up server.

User ID is Phone

Number

If the GXW410x has an assigned PSTN telephone number, this field should be set to “Yes”.

Otherwise, set it to “No”. If “Yes” is set, a “user=phone” parameter will be attached to the

“From” header in SIP request.

SIP Registration

This parameter controls whether the GXW410x needs to send REGISTER messages to the

SIP Server. The default setting is “Yes”.

Unregister on

Reboot

Default is No. If set to yes, the SIP user’s registration information will be cleared on reboot.

This parameter allows the user to specify the time frequency (in minutes) for the GXW410x to

refresh its registration with the specified registrar. The default interval is 60 minutes (or 1

hour). The maximum interval is 65535 minutes (about 45 days).

SIP Registration

Failure Retry Wait

Time

This parameter is most used by Service Providers. It prevents message REGISTER overload

of SIP Server in case of downtime due to maintenance or power failure. By increasing interval

length, common message load is decreased. Interval range is 1 – 3600 seconds.

NAT Traversal

This parameter defines whether the GXW410x NAT traversal mechanism will be activated or

not. If activated (by choosing “Yes”) and a STUN server is also specified, then the GXW410x

will behave according to the STUN client specification. Under this mode, the embedded STUN

client inside the GXW410x will attempt to detect if and what type of firewall/NAT it is sitting

behind through communication with the specified STUN server. If the detected NAT is a Full

Cone, Restricted Cone, or a Port-Restricted Cone, the GXW410x will attempt to use its

mapped public IP address and port in all of its SIP and SDP messages. If the NAT Traversal

field is set to “Yes” with no specified STUN server, the GXW410x will periodically (every 20

seconds or so) send a blank UDP packet (with no payload data) to the SIP server to keep the

“hole” on the NAT open.

Proxy-Require

SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.

Early Dial

Default is No. Use only if proxy supports 484 response.

Session Expiration

Grandstream implemented SIP Session Timer. The session timer extension enables SIP

sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE. Once the

session interval expires, if there is no refresh via a UPDATE or re-INVITE message, the

session will be terminated. Session Expiration is the time (in seconds) at which the session is

considered timed out, if no successful session refresh transaction occurs beforehand. The

default value is 180 seconds.

Min-SE

The minimum session expiration (in seconds). The default value is 90 seconds.

Caller Request

Timer

If selecting “Yes” the phone will use session timer when it makes outbound calls if remote

party supports session timer.

Callee Request

Timer

If selecting “Yes” the phone will use session timer when it receives inbound calls with session

timer request.

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Grandstream Networks GXW410X User Manual Page 27

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