TOPEX MobiLink ISDN2GSM User`s Manual
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5.
Operation and modes of connection
5.1. Routing for least costs
No matter which mode of connection is used, the purpose of MobiLink
is to achieve Least Cost Routing of calls. The LCR function of the
MobiLink ISDN 2 GSM interface ensures that in each case calls
(incoming or outgoing) are routed through the direction with minimum
costs. For example, if a local subscriber of the PBX makes a call, the
prefix will be analyzed and the call will be routed accordingly, either to
the public ISDN network or to one of the GSM operators. This way,
instead of paying for a fixed-to-mobile call, you will have only the low
cost of a fixed-to-fixed of mobile-to-mobile call inside the same
network. This holds true also for calls coming in from your agents in
the field who make calls from mobile phone: they will pay just for a
mobile-to-mobile conversation, avoiding interconnection fees. Using
the DISA feature, the mobile callers may get the extension they want,
without need for a human operator of the PBX.
Alternately, the two GSM channels of MobiLink may feature SIM cards
for the same mobile provider, but with different subscriptions. The
OAM program will select the best subscription for any given moment
of time (for example, the operator that provides lower tariff by night or
during the weekend).
Another instance of getting lower tariff by using MobiLink is when
several subscribers of your PBX make calls to a certain mobile
provider. Since most of the calls to that provider will be routed through
a specific GSM module of MobiLink, you may use for that module a
SIM with convenient tariff rate (low cost per minute for a very large
number of minutes used).
In case you connect several MobiLink ISDN 2 GSM units to an ISDN
phone exchange, the possibilities of routing calls for least costs are
even better. First, you are no longer limited to two GSM modules, you
may use modules with SIM cards for two or three mobile providers,
each with different subscription that allows you to get a better tariff
rate.
Second, if all GSM modules in a MobiLink interface are engaged
(busy), the call to a mobile network may not only be rejected but
instead routed through another MobiLink ISDN 2 GSM connected to
the same PABX.
The OAM program uses CLIP to check the identity of the callers
against a data base. Thus calling can be restricted to certain selected
(authorized) subscribers, avoiding unnecessary costs.
Caller identification may be used for automated routing of calls.
All incoming call that contains information about the phone number
of the subscriber (ID) will be checked by the OAM program against
the CLIP routing list. Depending upon the “Action” you have set up,
Summary of Contents for MobiLink ISDN 2 GSM
Page 1: ...USER S MANUAL 2008...
