Case Study For Police GSM SIM BOX –SERVER GSM GATEWAY

Content Overview TOPEX SIM Server Architecture Architecture components TOPEX SIM Server features Alarms and statistics Advantages Redundancy mechanism Power supply autonomy

Overview Manages the SIM allocation without the need of human intervention by gathering the SIM cards in a central location 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 SIM cards organized into logical groups named SIM Pools Mobile modules organized into logical groups named GSM Pools Remote recharging from the web based interface of the prepaid SIM cards The administration and maintenance is achieved from the password protected web based interface The information is exchanged via IP connection: Necessary bandwidth 64kbps Roundtrip delay between SIM Server/box and GSM GW should be bellow 800ms

TOPEX SIM Server architecture LAN 2G/3G Networks Remote OAM 4 GSM ch 2G/3G Networks TOPEX SIM Server IP Network 10 GSM ch TOPEX SIM Box 10 TOPEX SIM Box 1 2G/3G Networks 30 GSM ch Cellular Gateway

Architecture components 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! TOPEX SIM Box – storage device which contains up to 512 SIM cards on a single equipment TOPEX VoiBridge – Cellular Gateway – up to 4 GSM / UMTS channels – available with FXO, BRI, PRI and VoIP trunks TOPEX Qutex – Cellular Gateway – up to 20 GSM / UMTS channels – available with FXO, BRI, PRI and VoIP trunks TOPEX multiAccess – Cellular Gateway – up to 64 GSM/UMTS channels OAM PC – web based administration, operation and maintenance interface

TOPEX SIM Server features 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 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

Alarms and statistics Real time alarming system 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 Advanced statistics – report system on SIM, SIM Pool, GSM Pool, gateway, operator CDR generation - text file with details such as: equipment name, card and port number, provider, IMSI code, number of calls or talk time

TOPEX VoiBridge VoIP to GSM / UMTS small capacity gateway SIM Server ready – work with TOPEX SIM Server Capacity 2 up to 4 channels VoIP to GSM gateway 2 up to 4 channels VoIP to UMTS gateway 1 SIM card per GSM channel SIP and H.323 supported – any to any conversion Mobile frequencies covered: GSM: 850/900/1800/1900 MHz UMTS: 850/1900/2100 MHz Configurable alarms by e-mail, SMS or phone call in case of low ASR or hardware failures

TOPEX Qutex VoIP PRI GSM / UMTS medium capacity probe Capacity: Up to 10 or 20 GSM/UMTS channels 5 plug-in boards with 2 or 4 GSM/UMTS channels per each board Up to 4 SIM cards for each GSM / UMTS channel SIM Server ready – can be used with TOPEX SIM Server Frequencies covered: GSM: 850/900/1800/1900 MHz UMTS: 850/1900/2100 MHz Configurable alarms by e-mail, SMS or phone call in case of low ASR or hardware failures

TOPEX multiAccess VoIP PRI GSM / UMTS large capacity probe Capacity: Up to 32 or 64 GSM/UMTS channels 16 plug-in boards with 2 or 4 GSM/UMTS channels per each board Up to 4 SIM cards for each GSM / UMTS channel SIM Server ready – can be used with TOPEX SIM Server Frequencies covered: GSM: 850/900/1800/1900 MHz UMTS: 850/1900/2100 MHz Configurable alarms by e-mail, SMS or phone call in case of low ASR or hardware failures

Solution without SIM Server Replace SIM NOC IP Traffic generator through GSM Network GSM Network GSM Network TOPEX VoiBridge TOPEX VoiBridge SIM need to be changed SIM need to be changed

SIM cards storage box – 512 SIM cards/box Solution diagram SIM server aplication SIM cards storage box – 512 SIM cards/box TOPEX SIM Box Remote OAM TOPEX SIM Server Central Location Branch 1 SIM allocation IP Network IP PBX Branch n H323 or SIP Branch 2 IP PBX Mobile Users GSM Network IP PBX TOPEX VoiBridge H323 or SIP H323 or SIP

Solution description The solution includes several remote locations and a central location In each remote location will be installed a TOPEX GSM Gateway equipment – between 4 and 32 channels GSM Gateway The GSM Gateway will be connected to the company IP PBX through SIP or H.323 trunks 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 In the central location will be installed the SIM Server and the SIM Box equipments All the SIM cards will be stored in the central location The remote locations will not include SIM cards in the GSM Gateways The allocation of SIM cards will be made remotely from the central location to all remote sites

How it works IP NOC TOPEX SIM Box TOPEX SIM Server SIM request SIM allocation SIM request SIM allocation Mobile User GSM Network GSM Network TOPEX VoiBridge TOPEX VoiBridge

TOPEX SIM Server advantages All SIM cards used are virtually stored and managed in a single central “SIM SERVER” All SIM cards are physically stored in SIM Boxes located at client premises 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 The GSM modem has access to the remote SIM via a GSM terminal adapter/SIM emulator Flexible SIM allocation, according to tariff plans of the mobile carriers (advanced LCR) No need for human intervention to change SIMs manually Different algorithms for SIM selection; flexible SIM timer settings (minute, hour, day)

Redundancy mechanism I The SIM Server solution includes a central storage system – SIM Box equipment with SIM cards The remote locations contains 4 channels GSM Gateways – TOPEX VoiBridge The allocation of the SIMs is made remotely from the SIM Server application The first redundancy mechanism consist in local SIM cards installed in the GSM Gateways – additional to the SIM cards located in the SIM Box The communication between the SIM Box and the remote gateways contains a Keep Alive Mechanism on the TCP/IP connection When the TCP/IP connection is broken the Keep Alive mechanism signals the malfunction between the gateways and the SIM Box The remote gateways will automatically use the local SIM cards instead of SIM Box cards

Redundancy mechanism I diagram Central Location Central storage for SIM cards TOPEX SIM Box TOPEX SIM Server Keep alive mechanism – no connection between the GW and the SIM Box IP Network X TCP/IP connection is down VoiBridge will use only the local SIM cards TOPEX VoiBridge TOPEX VoiBridge TOPEX VoiBridge

Redundancy mechanism II The second redundancy mechanism implies the use of 2 or several SIM Box storage equipments which allows the distribution of SIM cards Instead of using a single SIM Box for storage, the SIM cards are distributed in 2 or several boxes with an additional redundancy purpose 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 The SIM cards from the SIM Box 1 will have attached a higher priority than the SIM cards from SIM Box 2 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

Redundancy mechanism II diagram Central Location High Priority SIM Server Low Priority SIM Cards distribution in SIM Box 1 and SIM Box 2 SIM Box 1 malfunction SIM Box 2 SIM Box 1 GSM module will use the SIM card with a lower priority GSM module uses the SIM card with high priority IP Network TOPEX VoiBridge TOPEX VoiBridge TOPEX VoiBridge

Redundancy mechanism II diagram Central Location High Priority SIM Box 2 malfunction SIM Server Low Priority SIM Cards distribution in SIM Box 1 and SIM Box 2 SIM Box redundant SIM Box 2 SIM Box 1 GSM module will use the SIM card with a lower priority SIM Box 3 GSM module uses the SIM card with high priority IP Network TOPEX multiAccess TOPEX VoiBridge TOPEX VoiBridge TOPEX VoiBridge

Redundancy mechanism III The third redundancy mechanism includes the possibility to use empty SIM Box equipments with the same IP address with the operational one When the operational SIM Box equipment fails or it is damaged, the client can use the other SIM Box equipments 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 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

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

Power consume TOPEX Equipment Consumed power (Watts) For power supply back-up autonomy for TOPEX equipments we recommend UPS systems The consumed power for each equipment provided by TOPEX is detailed in the table below: According to equipments installed in each location the UPS can be dimensioned in order to achieve the required capacity by the Turkish Police TOPEX Equipment 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 multiAccess – 30 GSM channels 90

UPS autonomy 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 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. 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 1h 40m Autonomy for 3 KVA UPS 8h 50m 8h 5h 30m

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