HandyTone | Grandstream Networks, Inc. |
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| 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 (with |
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| no payload data) to the SIP server to keep the mapped port open on the 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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| SIP Extension to notify SIP server that the unit is behind the NAT/Firewall. |
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| SUBSCRIBE for |
| Default is “No”. When set to “Yes” a SUBSCRIBE for Message Waiting |
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| MWI |
| Indication will be sent periodically |
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| Offhook |
| This parameter allows the user to configure a User ID or extension number to |
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| be automatically dialed upon offhook. 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 the |
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| “@” 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 are supported locally, such as call- |
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| waiting, transfer, |
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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 |
| Default is No. |
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| Waiting |
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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 |
| 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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| FXS Impedance |
| Selects the impedance of the analog telephone connected to the Phone port. |
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