
| Grandstream Networks, Inc. | ||
| Auto Upgrade | Choose Yes to enable HTTP upgrade and provisioning. | 
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 | In “Check for new firmware every” field, enter the number of days to check the HTTP | |
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 | server for firmware upgrade or configuration. | 
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| Subscribe for MWI: | Default is NO. When set to Yes a SUBSCRIBE for Message Waiting Indication will be | |
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 | sent periodically. | 
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| Offhook | This parameter allows a user to configure a User ID or extension number to be | |
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 | automatically dialed upon offhook. Please note that only the user part of a SIP address | |
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 | needs to be entered here. The HandyTone ATA will automatically append the “@” and | |
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 | the host portion of the corresponding SIP address. | 
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| Enable Call Features | Default is No. If set to Yes, Call Forwarding &  | |
| Disable Call Waiting | Default is No. | 
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| Send DTMF | This parameter controls the way DTMF events are transmitted. There are 3 ways: in | |
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 | audio which means DTMF is combined in audio signal (not very reliable with  | |
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 | rate codec), via RTP (RFC2833), or via SIP INFO. | 
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| DTMF Payload Type | This parameter sets the payload type for DTMF using RFC2833 | |
| Send Flash Event | This parameter allows a user to control whether to send an SIP NOTIFY message | |
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 | indicating the Flash event, or just to switch to the voice channel when the user presses | |
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 | the Flash key. | 
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| FXS Impedance | Selects the impedance of the analog telephone connected to the Phone port. | |
| NTP server | This parameter defines the URI or IP address of the NTP server which the HandyTone | |
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 | ATA will use to display the current date/time. | 
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| Send Anonymous | If this parameter is set to “Yes”, the “From” header in outgoing INVITE message will be | |
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 | set to anonymous, essentially blocking the Caller ID from displaying. | |
| Lock keypad update | If this parameter is set to “Yes”, the configuration update via keypad is disabled. | |
| WAN side http | If this parameter is set to “No”, the HTML configuration update via WAN port is | |
| access | disabled. | 
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