2N ATEUS, User Manual

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6.5.3. GSM
6.5.3.1 Basic parameters
Calling Line Identification Restriction, CLIR
This parameter decides whether the gateway SIM card subscribing number will be sent
to the GSM network. All subscribers of a PBX using the GSM gateway connected to this
PBX are presented with the same caller’s number, which is the SIM card number in the
GSM network. From the technological point of view it is impossible to transmit
information about the caller’s number from the ISDN into GSM. (This function is
supported the other way round, i.e. all ISDN subscribers can see the number of a GSM
caller). So it is mostly convenient to prohibit sending the number (activate CLIR) to
avoid problems of back calls to the gateway (e.g. when a GSM phone call is missed.
- On, CLIR is active, the number is not sent to the GSM network. WARNING: This
function must be supported and activated by your GSM provider. If not, your number will
be transmitted to the network and, in some GSM networks, you cannot perform an
outgoing call.
- Off, CLIR is inactive, the number is transmitted.
Allowed call route
This parameter allows to establish connections in the incoming and outgoing directions.
- Incoming from GSM, you can just receive calls from the GSM network. You cannot
perform active (outgoing) calls from the gateway.
- Outgoing to GSM, you can use the gateway for outgoing calls only. All incoming calls
will be rejected.
- Both, the gateway supports establishing connections in both directions.
Fig.32 : Basic GSM parameters