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| environments. If symmetric NAT is detected, STUN will not work and ONLY outbound |
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| proxy can correct the problem. |
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| SIP transport |
| User can select UDP or TCP or TLS. Default is UDP. |
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| NAT Traversal (STUN) |
| This parameter defines whether or not the HT70X NAT traversal mechanism is |
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| activated. If activated (by choosing “Yes”) and a STUN server is also specified, then the |
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| HT70X performs according to the STUN client specification. Using this mode, the |
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| embedded STUN client will detect if and what type of firewall/NAT. If the detected NAT |
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| is a Full Cone, Restricted Cone, or a |
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| mapped public IP address and port in all of its SIP and SDP messages. |
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| If the NAT Traversal field is set to “Yes” with no specified STUN server, the HT70X will |
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| periodically (every 20 seconds or so) send a blank UDP packet (with no payload data) |
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| to the SIP server to keep the “hole” on the NAT open. |
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| SIP User ID |
| User account information, provided by VoIP service provider (ITSP). Usually in the form |
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| of digit similar to phone number or actually a phone number. HT701 and HT702 only |
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| Authenticate ID |
| SIP service subscriber’s Authenticate ID used for authentication. Can be identical to or |
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| different from SIP User ID. HT701 and HT702 only |
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| Authenticate Password |
| SIP service subscriber’s account password. HT701 and HT702 only |
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| Name |
| SIP service subscriber’s name for Caller ID display. HT701 and HT702 only |
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| DNS Mode |
| One from the 3 modes are available for “DNS Mode” configuration: |
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| One mode can be chosen for the client to look up server. |
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| The default value is “A Record” |
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| Tel URI |
| The default setting is “Disabled”. If the phone has an assigned PSTN |
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| Number, this field should be set to “User=Phone” then a |
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| “User=Phone” parameter will be attached to the “From header” in the SIP |
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| request to indicate the E.164 number. If server supports TEL URI format, then this |
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| option needs to be selected. |
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| SIP Registration |
| Controls whether the HT701 needs to send REGISTER messages to the proxy server. |
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| The default setting is Yes. |
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| Unregister on Reboot |
| Default is No. | If set to Yes, the SIP user’s registration information will be cleared on |
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| reboot. |
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| Outgoing Call without |
| Default is No. If set to “Yes,” user can place outgoing calls even when not registered (if |
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| Registration |
| allowed by Internet Telephone Service Provider) but is unable to receive incoming |
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| FIRMWARE VERSION 1.0.3.1 | HT70X USER MANUAL | Page 36 of 52 |
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