| incoming INVITE |
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| call will be rejected. If this option is enabled, the device will not be able to make direct |
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| IP calls. |
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| SIP T1 Timeout |
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| T1 is an estimate of the |
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| If the network latency is high, select larger value for more reliable usage. |
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| SIP T2 Interval |
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| Maximum retransmission interval for |
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| DTMF Payload Type |
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| This parameter sets the payload type for DTMF using RFC2833 |
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| Preferred DTMF method |
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| The HT503 supports up to 3 different DTMF methods including |
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| (in listed order) |
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| (RFC2833) and via Sip Info. The user can configure DTMF method in a priority list. |
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| Disable DTMF |
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| Default is No. If set to yes, use above DTMF order without negotiation |
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| Negotiation |
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| Send Flash Event |
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| Default is No. If set to yes, flash will be sent as DTMF event. |
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| Enable Call Features |
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| Default is Yes. (If Yes, call features using star codes will be supported locally) |
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| Offhook |
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| This parameter allows users to configure a User ID or extension number to be |
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| automatically dialed when offhook. Please note that only the user part of a SIP address |
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| needs to be entered here. The HT503 will automatically append the “@” and the host |
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| portion of the corresponding SIP address. |
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| Note: User will need this IP address when accessing the IVR via the web configuration |
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| page. |
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| SIP Extension to notify SIP server that the unit is behind the NAT/Firewall. |
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| Use NAT IP |
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| NAT IP address used in SIP/SDP message. Default is blank |
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| Distinctive Ring Tone |
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| Custom Ring Tone 1 to 3 with associate Caller ID: when selected, if Caller ID is |
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| configured, then the device will ONLY uses this ring tone when the incoming call is |
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| from the Caller ID. System Ring Tone is used for all other calls. When selected but no |
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| Caller ID is configured, the selected ring tone will be used for all incoming calls. |
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| Distinctive ring tones can be configured not only for matching whole number, but also |
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| for matching prefixes. In this case symbol * (star) will be used. |
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| If server supports |
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| ring tone |
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| used. |
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| For example: |
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| If configured as *617, Ring Tone 1 will be used in case of call arrived from |
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| Massachusetts. Any other incoming call will ring using cadence defined in parameter |
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| System Ring Cadence located under Advanced Settings Configuration page. |
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| Disable Call Waiting |
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| Default is No. |
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| Disable Call Waiting |
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| Default is No. This is to disable the caller ID when a call waiting information arrives. |
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| Caller ID |
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| Disable Call Waiting |
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| Default is No. This is to disable the stutter Call Waiting Tone when a Call Waiting |
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| Tone |
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| information arrives. The CWCID information will still be displayed. |
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| Disable Reminder Ring |
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| Default is N | o. The reminder ring for the |
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| for |
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| to Yes. |
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| Disable Visual MWI |
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| If set to “YES”, the MWI information will not be transferred to the analog phone |
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| connected to the FXS port. |
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| Ring Timeout |
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| Sets the time in which an incoming call will stop ringing when not picked up. |
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| Default value is 20 seconds. In case this feature activated using * codes (*92 code), |
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| the call will be forwarded after this preconfigured amount of time. |
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| No Key Entry Timeout |
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| Default is 4 seconds. |
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| Early Dial |
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| Default is No. Use only if proxy supports 484 response. This parameter controls |
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| whether the phone will send an early INVITE each time a key is pressed when a user |
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| dials a number. If set to “Yes”, an INVITE is sent using the |
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| far. Otherwise, no INVITE is sent until the |
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| seconds have elapsed. The “Yes” option should be used ONLY if there is a SIP proxy |
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| configured and the proxy server supports 484 Incomplete Address response. |
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| Otherwise, the call will likely be rejected by the proxy (with a 404 Not Found error). |
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| Note: This feature is NOT designed to work with and should NOT be enabled for direct |
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| Grandstream Networks, Inc. |
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| HT503 User Manual | Page 26 of 38 |
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| Firmware 1.0.4.2 | Last Updated: 06/2011 |
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