coM.sat ISDN Basic
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16/01/09 44 coMsat ISDN Basic Manual V2.7.doc
Note Protection Mark according to DIN 34!
The settings on this page solve the following problem:
When using a GSM gateway the calling party number can not be transferred to the
called party, but he sees the number of the SIM card of the gateway (if CLIR is
switched off, else none at all).
On one side this is inconvenient for the called party because it can not decide
whether to accept the call or not.
On the other side a problem occurs when the call is not accepted, or the called party
is busy. In this case it is not possible for the calling party to wait for a return call,
because the called party has no information about the calling party number.
It would be possible to transfer the number of the used GSM module so the called
party could make a return call and be connected to the PBX. This is of little use
because the caller has no information concerning the DDI from which he was called,
so he could only be forwarded to the default number.
To overcome this problem, two strategies are possible, depending on whether the
CLIR of the calling GSM channel of the gateway is activated or not.
The ”Calling Number Transfer” settings activate the sending of an SMS to the
called user who could not be talked to. This SMS contains a text and additional
information on the number to call back. This additional information has the following
syntax and meaning:
<callback number><no>
callback number: The head number of the PBX
no: Extension number
Example:
The following text has been entered for the SMS:
“Please call back to <+4962047050><no>”
(Do not enter the quotation marks)
If the caller calls from extension 18, the called user gets the following SMS:
“Please call back to +496204705018”
The time after which an SMS is to be sent if the called party does not answer can be
configured. If e.g. the called party does not answer within 30 seconds, the call Is
terminated and the SMS sent. If the called user rejects the call or is busy, this
happens immediately.
The sending of the SMS can optionally be done only after confirmation by the caller,
not automatically. To configure this, the option ”Ask for confirmation” must be
activated. Then the SMS is only sent if the caller sends the DTMF tone of digit 1.
Then it is additionally possible to configure an announcement that asks for the
confirmation instead of only playing a tone.
In addition, confirmation tones can be sent to the caller depending on the setting of
”Report sending of SMS”.
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