| NAT Traversal |
| This parameter defines whether the phone NAT traversal mechanism will be |
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| activated or not. If activated (by choosing “Yes”) and a STUN server is also |
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| specified, then the phone will behave according to the STUN client |
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| specification. Under this mode, the embedded STUN client inside the phone |
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| will attempt to detect if and what type of firewall/NAT it is behind by sending |
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| appropriate request to the specified STUN server. |
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| If this field is set to “Yes” with no specified STUN server, then the phone will |
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| only periodically (every 20 seconds by default) send a blank UDP packet |
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| (with no payload data) to the SIP server to keep the mapped port open on the |
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| NAT. |
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| The |
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| order to keep the port open on the router. This parameter defines the interval |
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| time that HT286 send the UDP package. The default setting is 20 second. |
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| Use NAT IP |
| NAT IP address is used in SIP/SDP message. Default is blank. |
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| Use STUN |
| Use STUN |
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| to detect networks |
| does not yield any response for configured number of times, the device will restart the |
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| connectivity |
| TCP/IP stack. If the STUN server does not respond when the device boots up, the |
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| feature is disabled. |
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| SIP Extension to notify SIP server that the unit is behind the NAT/Firewall. |
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| SUBSCRIBE for MWI |
| Default is “No”. When set to “Yes” a SUBSCRIBE for Message Waiting |
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| Indication will be sent periodically |
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| Off hook |
| This parameter allows the user to configure a User ID or extension number to |
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| be automatically dialed upon off hook. Please note that only the user part of a |
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| SIP address needs to be entered here. The phone will automatically append |
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| the “@” and the host portion of the corresponding SIP address. |
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| Enable Call Feature |
| Default is Yes. If set to “Yes”, call features using star codes are supported |
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| locally. |
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| Use |
| Conference mode, default option is No. If set to yes, the feature code for |
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| conference |
| coference *23 would be disabled. |
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| Disable Call Waiting |
| Default is No. |
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| Disable |
| Default is No. |
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| Send DTMF |
| This parameter specifies the mechanism to transmit DTMF digit. There are 3 |
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| modes supported: in audio which means DTMF is combined in audio signal |
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| (not very reliable with |
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| INFO. |
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| DTMF Payload Type |
| This parameter sets the payload type for DTMF using RFC2833 |
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| Send Flash Event |
| Default is No. If set to yes, flash will be sent as DTMF event. |
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| Onhook Threshold |
| The amount of time the hookflash is pressed that will cause the device to on |
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| hook. Default is 800ms. |
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| FXS Impedance |
| Selects the impedance of the analog telephone connected to the Phone port. |
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Grandstream Networks, Inc. | Page 21 of 28 | ||||
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| Firmware 1.1.0.31 | Last Updated: 1/2009 | |