Transcript Case Study For Police GSM SIM BOX – SERVER GSM GATEWAY www.birtel.com.tr Content • Overview • TOPEX SIM Server Architecture • Architecture components • TOPEX SIM Server features • Alarms and statistics • Advantages • Redundancy mechanism • Power supply autonomy www.birtel.com.tr Overview • Manages the.

Case Study
For Police
GSM SIM BOX –
SERVER
GSM GATEWAY
www.birtel.com.tr
Content
•
Overview
•
TOPEX SIM Server Architecture
•
Architecture components
•
TOPEX SIM Server features
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Alarms and statistics
•
Advantages
•
Redundancy mechanism
•
Power supply autonomy
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Overview
•
Manages the SIM allocation without the need of human intervention by
gathering the SIM cards in a central location
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Virtual allocation of SIM cards – any SIM card stored in the SIM Box may
be dynamically assigned to any GSM channel of any TOPEX gateway
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SIM cards organized into logical groups named SIM Pools
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Mobile modules organized into logical groups named GSM Pools
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Remote recharging from the web based interface of the prepaid SIM cards
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The administration and maintenance is achieved from the password
protected web based interface
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The information is exchanged via IP connection:
– Necessary bandwidth 64kbps
– Roundtrip delay between SIM Server/box and GSM GW should be
bellow 800ms
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TOPEX SIM Server architecture
LAN
2G/3G
Networks
Remote
OAM
TOPEX
SIM Server
4 GSM ch
2G/3G
Networks
IP
Network
10 GSM ch
30 GSM ch
TOPEX
SIM Box 1
2G/3G
Networks
Cellular
Gateway
TOPEX
SIM Box 10
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Architecture components
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TOPEX SIM Server – a central device manager which administrate
several SIM Boxes and GSM Gateways
– One SIM Server can manage 10 SIM boxes – more than 5000
SIMs!
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TOPEX SIM Box – storage device which contains up to 512 SIM cards
on a single equipment
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TOPEX VoiBridge – Cellular Gateway – up to 4 GSM / UMTS
channels – available with FXO, BRI, PRI and VoIP trunks
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TOPEX Qutex – Cellular Gateway – up to 20 GSM / UMTS channels –
available with FXO, BRI, PRI and VoIP trunks
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TOPEX multiAccess – Cellular Gateway – up to 64 GSM/UMTS
channels
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OAM PC – web based administration, operation and maintenance
interface
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TOPEX SIM Server features
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•
•
•
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Each SIM can have:
– Maximum “talk-time” per day and Maximum “talk-time” per month
Why?
– Avoid extra-usage of a SIM - improve network test reliability
Algorithms for choosing a SIM:
– Talk time - the SIM with minimum talk time will be offered
– Nr of calls - the SIM with the minimum number of calls will be
offered
– Last usage - the SIM which has the longest idle state
– Credit - the SIM which the maximum credit value will be offered
Why?
– To do load-balancing between the SIMs. One does not want to use
some SIMs more and some less. They have to be used approximately
equally – establish a constant use of SIM cards during tests
Generate SIM “travel” in GSM Gateways located in different places
– SIMS can be allocated to modules in one gateway and then
programmed to move to modules in another gateway
Why?
●
Multiple gateways can use minutes from the same SIM – test the availability of network to handle the SIM cards
movement
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Alarms and statistics
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Real time alarming system
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Alarms sent through SMS or E-Mail in case of:
– malfunction SIM cards
– failed connection between system
components
– low ASR and ACD
– insufficient SIM cards in a SIM pool
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Advanced statistics – report system on SIM, SIM
Pool, GSM Pool, gateway, operator
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CDR generation - text file with details such as:
equipment name, card and port number, provider,
IMSI code, number of calls or talk time
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TOPEX VoiBridge
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VoIP to GSM / UMTS small capacity gateway
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SIM Server ready – work with TOPEX SIM Server
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Capacity
– 2 up to 4 channels VoIP to GSM gateway
– 2 up to 4 channels VoIP to UMTS gateway
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1 SIM card per GSM channel
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SIP and H.323 supported – any to any conversion
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Mobile frequencies covered:
– GSM: 850/900/1800/1900 MHz
– UMTS: 850/1900/2100 MHz
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Configurable alarms by e-mail, SMS or phone call in case of low ASR or hardware failures
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TOPEX Qutex
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VoIP PRI GSM / UMTS medium capacity probe
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Capacity:
– Up to 10 or 20 GSM/UMTS channels
– 5 plug-in boards with 2 or 4 GSM/UMTS channels per each board
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Up to 4 SIM cards for each GSM / UMTS channel
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SIM Server ready – can be used with TOPEX SIM Server
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Frequencies covered:
– GSM: 850/900/1800/1900 MHz
– UMTS: 850/1900/2100 MHz
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Configurable alarms by e-mail, SMS or phone call in case of low ASR or hardware
failures
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TOPEX multiAccess
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VoIP PRI GSM / UMTS large capacity probe
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Capacity:
– Up to 32 or 64 GSM/UMTS channels
– 16 plug-in boards with 2 or 4 GSM/UMTS channels per each board
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Up to 4 SIM cards for each GSM / UMTS channel
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SIM Server ready – can be used with TOPEX SIM Server
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Frequencies covered:
– GSM: 850/900/1800/1900 MHz
– UMTS: 850/1900/2100 MHz
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Configurable alarms by e-mail, SMS or phone call in case of low ASR or
hardware failures
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Solution without SIM Server
Replace SIM
NOC
IP
Traffic generator
through
GSM Network
GSM
Network
GSM
Network
TOPEX
VoiBridge
TOPEX
VoiBridge
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Solution diagram
SIM server
aplication
Remote
OAM
Branch 1
TOPEX
SIM Server
TOPEX
SIM Box
Central
Location
IP
Network
IP PBX
H323 or SIP
SIM cards
storage box
– 512 SIM
cards/box
SIM
allocation
Branch n
Branch 2
IP PBX
GSM
Network
IP PBX
TOPEX
VoiBridge
Mobile
Users
H323 or SIP
H323 or SIP
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Solution description
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The solution includes several remote locations and a central location
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In each remote location will be installed a TOPEX GSM Gateway equipment – between 4 and 32
channels GSM Gateway
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The GSM Gateway will be connected to the company IP PBX through SIP or H.323 trunks
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The calls to the GSM network from the sites will be routed through the GSM Gateway equipment
in order to cut the costs of the calls from fixed to mobile
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In the central location will be installed the SIM Server and the SIM Box equipments
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All the SIM cards will be stored in the central location
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The remote locations will not include SIM cards in the GSM Gateways
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The allocation of SIM cards will be made remotely from the central location to all remote sites
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How it works
NOC
TOPEX
SIM Server
TOPEX
SIM Box
IP
SIM
request
Mobile
User
SIM
request
SIM
allocation
SIM
allocation
GSM
Network
TOPEX VoiBridge
GSM
Network
TOPEX VoiBridge
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TOPEX SIM Server advantages
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All SIM cards used are virtually stored and managed in a single central “SIM SERVER”
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All SIM cards are physically stored in SIM Boxes located at client premises
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The SIM server allocates the SIM cards remotely, via an IP connection - avoids
expensive and time-consuming trips for on site SIM card replacement and recharging
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The GSM modem has access to the remote SIM via a GSM terminal adapter/SIM
emulator
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Flexible SIM allocation, according to tariff plans of the mobile carriers (advanced LCR)
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No need for human intervention to change SIMs manually
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Different algorithms for SIM selection; flexible SIM timer settings (minute, hour, day)
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Redundancy mechanism I
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The SIM Server solution includes a central storage system – SIM Box equipment with SIM cards
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The remote locations contains 4 channels GSM Gateways – TOPEX VoiBridge
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The allocation of the SIMs is made remotely from the SIM Server application
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The first redundancy mechanism consist in local SIM cards installed in the GSM Gateways –
additional to the SIM cards located in the SIM Box
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The communication between the SIM Box and the remote gateways contains a Keep Alive
Mechanism on the TCP/IP connection
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When the TCP/IP connection is broken the Keep Alive mechanism signals the malfunction between
the gateways and the SIM Box
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The remote gateways will automatically use the local SIM cards instead of SIM Box cards
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Redundancy mechanism I diagram
Central
Location
TOPEX
SIM Server
TCP/IP
connection is
down X
Central
storage for
SIM cards
TOPEX
SIM Box
Keep alive mechanism
– no connection
between the GW and
the SIM Box
IP
Network
X
X
TOPEX
VoiBridge
TOPEX
VoiBridge
VoiBridge
will use only
the local SIM
cards
TOPEX
VoiBridge
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Redundancy mechanism II
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The second redundancy mechanism implies the use of 2 or several SIM Box storage equipments
which allows the distribution of SIM cards
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Instead of using a single SIM Box for storage, the SIM cards are distributed in 2 or several boxes
with an additional redundancy purpose
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Each GSM module from the remote GSM Gateways will have assigned 2 SIM cards – one SIM card
from SIM Box 1 and one SIM card from SIM Box 2
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The SIM cards from the SIM Box 1 will have attached a higher priority than the SIM cards from SIM
Box 2
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When the SIM Box 1 is unavailable the GSM module can not use anymore the SIM card with higher
priority. In this case the GSM module from the remote GSM Gateway will use the SIM card with a
lower priority located in the second SIM Box
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Redundancy mechanism II diagram
Central
Location
High
Priority
SIM Server
Low
Priority
SIM Box 1
malfunction
SIM Box 2
SIM Box 1
GSM module uses
the SIM card
with high priority
SIM Cards distribution
in SIM Box 1 and
SIM Box 2
IP
Network
TOPEX
VoiBridge
GSM module will use
the SIM card
with a lower priority
TOPEX
VoiBridge
TOPEX
VoiBridge
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Redundancy mechanism II diagram
Central
Location
High SIM Box 2
SIM Server
Priority malfunction
Low
Priority
SIM Cards distribution
in SIM Box 1 and
SIM Box 2
SIM Box 1
SIM Box 2
GSM module uses
the SIM card
with high priority
SIM Box 3
IP
Network
TOPEX
VoiBridge
SIM Box
redundant
GSM module will use
the SIM card
with a lower priority
TOPEX
VoiBridge
TOPEX
multiAccess
TOPEX
VoiBridge
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Redundancy mechanism III
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The third redundancy mechanism includes the possibility to use empty SIM Box equipments with the
same IP address with the operational one
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When the operational SIM Box equipment fails or it is damaged, the client can use the other SIM
Box equipments
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The client need to extract manually the boards with SIM cards from the damaged SIM Box and to
insert them in the new SIM Box
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This mechanism will require some time for SIM cards movement but will resolve the problem which
can appear in the case of a unusable central SIM storage box
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Redundancy mechanism III diagram
Central
Location
SIM Server
SIM Cards movement
from SIM Box 1
to SIM Box 2
SIM Box 1
malfunction
SIM Box 2
SIM Box 1
IP
Network
TOPEX
VoiBridge
TOPEX
VoiBridge
TOPEX
VoiBridge
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Power consume
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For power supply back-up autonomy for TOPEX equipments we recommend UPS systems
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The consumed power for each equipment provided by TOPEX is detailed in the table below:
TOPEX Equipment
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Consumed power (Watts)
SIM Server (HP Proliant PC Server)
250
SIM Box – 512 SIM cards
60
VoiBridge – 4 GSM channels
40
Qutex – 10 GSM channels
60
multiAccess – 30 GSM channels
90
According to equipments installed in each location the UPS can be dimensioned in order to achieve
the required capacity by the Turkish Police
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UPS autonomy
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For instance if the central location 1 SIM Server unit, 1 SIM Box unit and 1 multiAccess the
consumed power is about 400 W (250 + 60 + 90) which means around 560 VA
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By using an UPS system with 2200 VA (2,2 KVA) the autonomy for the equipments installed in the
central location will be around 1.5 hours. In case of using a larger capacity UPS, for instance 5KVA
the power supply autonomy will increase to 3 hours.
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The central location where the SIM Box and SIM Server will be installed has the highest power
consume. For the other sites which includes 1 VoiBridge, Qutex or multiAccess the power supply
autonomy is detailed below:
Equipment name
VoiBridge
Qutex
multiAccess
Consumed power
40 W
60 W
90 W
Autonomy for 1 KVA UPS
3h
3h
1h 40m
Autonomy for 3 KVA UPS
8h 50m
8h
5h 30m
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Contact
Birtel
Network
Technologies
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[email protected]
Tel
+90 312 442 56 02
Fax
+90 312 442 56 03
Address Abidin Daver Sk. No:7/11
Çankaya - Ankara
Türkiye
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