User manual WELLTECH PSTN WHITE PAPER OF LAN PHONE 201 H.323
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Manual abstract: user guide WELLTECH PSTNWHITE PAPER OF LAN PHONE 201 H.323
Detailed instructions for use are in the User's Guide.
[. . . ] White Paper of LAN Phone 201 H. 323 version PSTN Debug and PSTN hidden command
Part I Introduction
This document includes two important sections: one is how to use PSTN debug flag to analyze user's PSTN environment when LAN Phone 201 has erroneous PSTN incoming call detection and related LCD messages. The other is to introduce the hidden command [pstn] so that user can set their own PSTN parameters in LAN Phone 201 when default value can't meet their requirement.
Part II PSTN Debug Flag
1. [. . . ] The less the value is, LAN Phone will be more sensitive about PSTN incoming call detection, however, if LAN Phone has big electric noise, it will also more easy to be determined noise as Ring signal erroneously. Pulse Maximum: Default value is 500 = 2500ms. pstn -pulsemax "value" This is to prevent wrong determination of Ring signal. If LAN Phone detected 500 times (2500ms) of Ring signal, this value is obviously not reasonable, which means the detection is not correct, and LAN Phone will automatically rerun PSTN detection program and reset Auto Detect Signal (please refer to item 5 pstn -signal). We will suggest user to set: "value = Ring time length(ms)¡Ò 5 + 500".
3. Silence Sample: Default value is 900 = 4500ms pstn -silence "value" This is to set silence time length for LAN Phone to determine if there is no more PSTN incoming call. When LAN Phone has PSTN incoming call, and PSTN user cancel this call, after LAN Phone detect 900 times (4500ms) without Ring signal, on LCD will stop displaying "PSTN IMCOMING" and return to standby mode. If user set this value too short, PSTN related messages displayed on LCD will be not smoothly, if user set this value too long, LAN Phone will took more time to return standby mode. We suggest user to set: "value = silence time(ms)¡Ò 5 +100 (to 200), or detected value +100 (to 200)". (Please refer to Part II for detail debug command of detected silence value) 4. Auto Detect Signal: Default value is ON. pstn -autodet "0/1" (0:OFF/1:ON) This is to enable or disable auto detection function. [. . . ] If user set this value too short, there may be not enough time for LAN Phone to detect correct Hardware type, if user set this value too long, it will increase initializing time of LAN Phone. We suggest user to set: "value = (Ring time (ms)+ Silence time (ms)) ¡Ñ 2 ¡Ò 3" [. . . ]
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