User manual

Help for parameters:
6001 = Enables the Intelligent Incoming Call Routing according to the caller’s number if included
in the Intelligent Routing table.
6002 = your own international prefix is used for the completion of the called number to be
included in the Intelligent Routing table.
6003 = Defines the password for the "Forward this caller to extension ... next time” command.
6004 = Locked records (starting from the table beginning) are protected against overwriting and
have priority.
7.5. Parameters for "Dial-thru" model
Parameter
Par.
No.
Min. Max. Def.
Your
choice
Notes
Max. off-hook time for PSTN line in case of no
dialling
701 1 255 10 *) [s]
Min. on-hook time for PSTN line 702 100 25500 1000 *) [ms]
Max. pause in ringing from PSTN 703 100 25500 4500 **)
DTMF burst time 704 100 25500 100 ***)
DTMF break time 705 100 25500 100 ***)
Time between off-hook and dialling to PSTN 706 100 25500 1000 ***)
Notes:
*) These two parameters are used during an outgoing call. PSTN line is already off hook (since
PBX line off-hook). When dialling is finished, GSM gateway checks how long is PSTN line off
hook. If parameter 701 is over, GSM gateway hangs up for a moment, using parameter 702.
**) It is recommended to measure ringing waveform from PSTN and set this parameter exactly.
Otherwise, following situations may occur:
a) Parameter is too short: during ringing from PSTN, after each ring this time-out will
expire earlier than next ring will start. In this "window", if someone will access GSM
gateway from PBX to make an outgoing call, these two people may be connected (and
calling party from PSTN will hear DTMF dialling) or calling party from PSTN will hear a
silence and then connection will be terminated.
b) Parameter is too long: after unsuccessful call from PSTN, if someone will access GSM
gateway from PBX to make an outgoing call just at the moment when calling party from
PSTN hanged up, GSM gateway will consider this call as an incoming one. Call will be
always made via PSTN.
According to our experience, both instances are very rare. First one may be more
unpleasant, second one can only decrease savings (very little). Therefore it is better to set
parameter 703 little bit longer than necessary (10 seconds default value is big enough).
***) Parameters 704 - 706 are used when dialling is repeated to PSTN. Pulse dialling is not
possible yet.
Help to parameters
701, 702 = In a future upgrade, perhaps these parameters will be used to protect PSTN line against busy
tone, power down or failure state which can be caused by long off-hook during GSM call.
703 = Time between two rings from PSTN. It is not recommended to set less than 6 seconds.
704 = Time of DTMF digit transmitted to PSTN
705 = Time between two DTMF digits transmitted to PSTN
706 = Time between Off-hook and start of DTMF dialling
57