TopGSM
Series GSM analog gateway is used
for connecting with the FXO ports of an analog VoIP gateway.
With the use of the TopGSM
gateway, inbound VoIP calls destined for GSM handsets and calls originating from
GSM handsets can be sent to or received from the GSM handsets by the VoIP
gateway without having to route the calls through the local PSTN thus
eliminating the cost of paying the local wireline telephone exchange for the
unnecessary switching.
Up to 4 SIM Cards per GSM Channel
The
4 SIM cards
feature of the
TopGSM gateways is important in markets where there are more
than one GSM operator providing GSM services. A common practice of a GSM
operator is to offer special rate concession to its subscribers for calling
Mobile Numbers that are within the same network of the GSM operator in various
forms such as: one flat rate for calling any Mobile Number within the
GSM network; or special discounted rates for calling Mobile Numbers that
are within the GSM network.
Each
GSM Module board contains
4 SIM cards holders. An intelligent SIM card can be
automatically switched according to 4 conditions:
Minute parameter ---
You can change counting of outgoing calls.
Count of minutes: Gateway will counter time
of outgoing calls.
Count of calls: Gateway will counter number
of outgoing calls.
By time --- SIM cards will be switched according to
standby time
Time of use SIM ---- Interval of using selected SIM
card.
Random --- SIM cards will be switched at random time.
--- Interval of change SIM card.
In this interval
hours: minutes will be randomly switched SIM card. (SIM card will be switched after proceeding call hang-up).
Interoperability
The TopGSM
is compliant with the word wide use.
GSM:
Dual Band 900/1800 MHz
using
Wavecom GSMQ24XX
Tri Band 900/1800/1900 MHz using SIMCOM SIM300
Quad Band 900/1800/ 1900/850 MHz using SIMCOM
SIM340
CDMA: 2000 1X single or dual band 800/1900 MHz. Using
Wavecom CDMA Q24XX. As with the GSM single/dual channel gateway,
this version functions as a mobile phone that connects to an analog
telephone or PBX, only it utilizes the CDMA broadcasting system instead of
a SIM card in the GSM Network
