SS-15 BRI (ISDN 2 GSM) USER MANUAL
DOC. NO: SS-15-14 (REV. 01)
Page 6 of 26
4.2
CONFIGURING THE SIM CARDS
The SIM cards that will be used with SS-15 BRI (ISDN 2 GSM) must be
activated by the corresponding GSM operator. It must also be properly
configured before insertion in the GSM slot of the equipment. The
configuration of the SIM cards is performed using a GSM phone.
Disable request for PIN code – If the “PIN Code Request” option is disabled,
any value can be inserted in the “Pin Code” field of the Programming Tool.
When entering the correct PIN code, it will be stored in the equipment
memory. The SS-15 unit must be connected with the computer that runs the
Programming Tool through a serial connection in order to modify the “PIN
Code” (for more details refer to the User Manual for the isdncfg program).
Disable GSM services – most GSM operators assure several services
(redirection of calls, vocal mailbox) concerning the handling of incoming calls.
These are very useful when the cell-phone is busy or disconnected; it is an
advantage to use the call forwarding features provided by the GSM carrier. But
when the SS-15 BRI (ISDN 2 GSM) interface is used together with a phone
exchange it is generally better to disable those services because it can be
performed locally with fewer costs.
Disable Auto-re-dialling and Auto-answer – these options must be disabled if
they are provided by your GSM operator.
Turn off roaming - international roaming services allows one to make calls with
the same GSM subscription when travelling in other countries (where the service
provider has signed a roaming contract with the GSM operator). The roaming
option should be disabled, because SS-15 BRI was designed to work with PBX
or ISDN phones in stationary applications.
If roaming remains enabled, it is possible that when the local GSM carrier is
interrupted, the ISDN 2 GSM interface will connect to a foreign mobile operator
and the costs of the calls will be much higher.
Settings for configuration of the SIM cards
Description
Option
Select “OFF” for “Dial again –
Interval”.
If this option exists
Select “OFF” for “Auto Answering”
Required
Select “OFF” for “Call Waiting”
Required
4.3
INSERTING THE SIM CARDS
The ISDN 2 GSM interface needs SIM cards for the corresponding GSM
operators.
Each SIM card must be inserted in the corresponding slot of the SS-15 BRI
(ISDN 2 GSM) unit. Depending upon the equipment model, it may feature one
or two GSM modules, hence one or two slots for SIM cards.
