TEMA TELECOMUNICAZIONI SRL
GSM Gateway Interface DIAL-112
MAS-DIAL112-REV06EN
Page 6 of 35
1. INTRODUCTION OF GATEWAY DIAL-112
DIAL-112 is a device that redirects voice telephone calls over the GSM network allowing a
significant reduction in the cost of calls to mobile telephones by, for example, negotiating corporate
contracts. DIAL-112 gateway is available with 1 or 2 GSM modules (1-2 SIM). In this manual, will
be described the 2 GSM modules version. Users of the 1 GSM module version will not be able to
use the features available on the second GSM line.
The unit has a NT port for ISDN attach and double GSM module. Using DIAL-112 as the default
output interface for all calls directed to one or more telephone prefixes selected by internal
exchange (or mobile network prefixes) is obtained to address to the GSM network all the calls
coming by the two channels of the fixed line directed to mobile phones: DIAL-112 uses the GSM
modules to contact the user of mobile network and connect it inside the caller internal extension of
PBX. This will exploit the greater convenience of GSM network than fixed calls to mobiles.
If the PBX is provided with advanced routing functionality (LCR - Least Cost Routing) it is possible
to configure the relevant table (ARS - Automatic Route Select table) in a way that DIAL-112 is
chosen as the default output line for calls directed to one or more mobile GSM numbers,
depending on their prefixes. If the PBX has no LCR function, a dial code for the DIAL-112
connection can be prefixed to the telephone number normally called, so as to use DIAL-112 as an
outbound gateway. Moreover, DIAL-112 has an internal LCR mechanism that allows the selection
of the GSM module to use depending on the prefix of the called number.
For incoming calls, i.e. for calls to the SIM number of the built-in GSM module, DIAL-101A redials
the calls downstream the PBX, forwarding the caller identity (CLI). It is also possible to use
advanced features for calling management as the Smart callback function: in the case of an
internal PBX’s extension has placed a call attempt failed to a mobile phone, any request by the
called mobile phone will be transferred automatically from DIAL-112 into the PBX, and then directly
to the person who had originated the first call.
The unit connects directly to an ISDN BRI free PBX’s urban line attack (ISDN BRI T0). It can also
be used in processes where there is no access to the public telephone network (i.e. sites and
places decentralized). Calls to the GSM network does not pass from the basis of the fixed network,
thus leaving these possible resources always available for any incoming calls to the company. In
fact it is like to add two more lines in the PBX, used, for example, only to dial GSM network
numbers.
DIAL-112 can perform additional functions as two alarm contacts inputs: it is possible to be notified
via SMS (customizable) after alarm activation.
DIAL-112 is easy to install and connects to the programming PC via an USB port. For the
programming is not necessary to install any software, just a normal terminal emulation software
(such as HyperTerminal
™
for Windows
®
), and its installation is very simple and quick and requires
no special knowledge.
DIAL-112 can also be programmed with DTMF tones, locally reaching the ISDN attack of PBX or
remotely via GSM.
