Dedicated to Service Providers as well as for Telecom Operators, QuesCom Qasaar technologies enables enhanced telecom solutions smooth deployments.

Private Cloud


Qasaar stands for QuesCom Application Server And Advanced Router.


Application Server

Appliance running applications
Each application covers a vertical solution (Least Cost Routing, Callback, Mobility, Presence, IVR, Conferencing)


Advanced Router

Call router including contextual rules based on route availability, SIM location, price plan and credit as well as on user profile and realtime information (location & presence).


A Class 4 Switch
Qasaar gets calls and route them because of application execution. User profile is an important aspect of Qasaar. It can receive calls directly (SIP & H323) and manage remote gateways (QGP & MGCP). Qasaar also manages devices (media gateways & routers).

Qasaar won’t implement the PBX features, Qasaar is to be connected to a PBX. A PBX software can run as an application on Qasaar.


An Intelligent Network application
Qasaar also supports SIP, QGP, MEGACO protocols

GSM call termination
Efficient call routing to GSM gateways. Calls are routed directly to the correct gateway from SSV information. Simplify switch configuration: Qasaar is the only outbound way for the switch. Avoids tries/retries to find correct gateway. Reduces PDD. Improves failover and load balancing among GSM gateways.

Mobility services
Mobility services are deployed centrally. The appliance can be hosted, “Mobility as a service”=SAAS. Manages PBX, QuesCom gateways & 3rd party gateways. It is build on reliable and scalable database.

Hosted device management (routing, backup…)
Allowing: Centralised provisioning and remote monitoring.

Anti Roaming
User profiles are maintained centrally. Roaming sites can have QuesCom gateway, 3rd gateways or… nothing. Qasaar is provisionning and remotely configuring the phones (mobile phones and fixed phones). Qasaar has global view of network architecture and roaming users.


Multisite Enterprise:
Simplify deployment environments. QuesCom gateways are managed by Qasaar (Master/Relay). Rules, routes between gateways and configuration are centralised on Qasaar. CDRs and management is centralised on Qasaar. QuesCom gateways can be low end “passive” products. 3rd party routers can be managed (MGCP/MEGACO).



QuesCom Qtopus is a standalone wireless PBX for small businesses and remote branch offices of larger organizations. Qtopus offers a hybrid solution: a unique combination of GSM & VoIP.

Mobile Network Access & VoIP

QuesCom PBX directly connects to mobile networks. Enterprise customer’s telephony is benefiting from high quality and wide spread of mobile infrastructure.

Where fixed lines do not provide sufficient satisfaction, reliability or quick activation, mobile networks is the solution.

GSM, VoIP and Analogue embedded in a single box QuesCom PBX directly connects to the mobile networks.

Enterprise customer’s telephony is benefiting from high quality and wide spread of mobile infrastructure.

Where fixed lines do not provide sufficient satisfaction, reliability or quick activation, mobile networks is the solution.

Connect any analogue or IP phones to the box and you get immediate connection to the outside world using Qtopus GSM network embedded connectivity.

IPBX in an appliance

QuesCom Qtopus appliance has on-board PBX features including :

• Auto Provision

• Blind Transfer

• BLF Support

• Blacklist

• Call Detail Records (CDR)

• Call Forward

• Call Parking

• Call Pickup

Call Routing

• Call Transfer

• Call Waiting

• Call Recording

• Caller ID

• Conference

• Define Office Time

• Direct Inward System Access (DISA)

• DIDs

• Distinctive Ringtone

• Do Not Disturb (DND)

• Firewalls

• Follow me

• Interactive Voice Response (IVR)

• Intercom / Zone intercom

• Music on Hold

• Music on Transfer

• Paging / Zone Paging

• Queue

• Ring Group

• Route by Caller ID

• Skype Integration (Skype for SIP)

• Three-way Calling

• T.38

• Voicemail

• Voicemail to email

• Voicemail forwarding

• Web based Control Panel

Simplified web based configuration

QuesCom has developed a simplified web based interface to setup and configure routing rules as well as all necessary IPBX features.

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Dedicated to enterprises and branch offices
QuesCom 400 - Original Edition fits easily into your telephony architecture and contributes to your business success.


Connected to your IP-PBX, it provides new services to reduce your phone bill and improve productivity. Fixed-to-Mobile convergence solution, the QuesCom 400 is a mobility appliance for SME's and Large Accounts.


Technical specifications

QuesCom 400


2 PRI or 4 PRI
(in pass-through on PBX with 1 or 2 PRI)
4 BRI or 8 BRI
(in pass-through on PBX with 2 or 4 BRI)



0, 4, 8, 12, ,16 or 20 GSM channels
Quad band GSM (850/900/1800/1900
MHz), Dual band CDMA (800/1900 MHz)
Tri band UMTS (850/1900/2100 MHz)
Recommended GSM coverage: minimum



Standard capacity: 16 VoIP
Maximum capacity: 32 VoIP
Protocols: H.323, SIP
• Voice codecs: G.711, G.723.1, G.729a
• Fax codex: T.38



Ethernet 10/100 Mbps
TCP/IP Protocol



Not just a way to save money

Convergence equipment for multi-network telephony systems, QuesCom 400 connects the enterprise’s different telecom networks, landline, mobile and VoIP.
By drastically reducing the phone bill, QuesCom 400 is paid off in a few months.
QuesCom equipment can be installed in a unique site or network connected. It is IP native and ready to support the enterprise’s modularity and centralized management.


ISDN, VoIP, GSM equipment

GSM capacity: QuesCom 400 allows from 0 to 16 simultaneous GSM channels. VoIP capacity: it allows a capacity from 16 to 32 VoIP channels in H.323 or SIP. ISDN cards: it includes an ISDN card, BRI or PRI. Connection to the PBX: it is connected either in pass-through on the ISDN links, or in IP. Grouping: a group of 5 devices can be managed as a unique system.



Legacy PBX integration

IP integration


Seamless LCR for optimum routing

Each call routes according to advanced routing rule to pass it out by the most cost effective network.


VoIP migration without changing PBX

For a single site enterprise, QuesCom 400 interconnects VoIP operators in order to make a SIP Trunk. For a multisite enterprise, QuesCom 400 interconnects all sites in IP. The enterprise can smoothly migrate to IP without changing its existing architecture. QuesCom 400 perfectly fits to heterogeneous PBX environments.


Failover between voice networks

Because it integrates the ISDN, GSM and VoIP networks, QuesCom 400 allows redundancy in case of failure on one of these networks failure. Routing rules can be configured in order to ensure service continuity. For example, if the ISDN operator access is defective, the equipment can automatically supply a failover link to GSM networks.

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A complete SIM card management solution for QuesCom GSM gateways


As an addition to your QuesCom GSM gateway solution architecture, the QuesCom SIM Server manages the SIM allocation without the need of human intervention by gathering all SIM cards in a single location. As an addition to your QuesCom GSM gateway, the QuesCom SIM Server takes the best out of GSM providers price plans. According to the time of the day, GSM gateways are loaded with the most adapted SIM cards.

A comprehensive web-based interface enables to manage the SIM allocation based on intuitive rules. No more need to send technical people on site every few days to change SIM cards; all management operations are done from a central site even if your GSM gateways are deployed in several locations or even across countries.


Key benefits

Always use the right SIM at the right time
Up to 416 SIM cards per SIM array
Highly scaleable architecture
Specifically designed for multi-operator and cross country deployment
Maximize SIM price plan usage





Design to manage easily large number of SIM cards
Monitor and secure SIM cards in central NOC
Powerful and Intuitive Web Interface

Sim Card Allocation


Advanced SIM Price Plan Management
Adapt to any Price Plan - Expert Automatic Credit Synchronisation USSD
Prepaid Management ( Dynamic SIM replacement, Top-Up )

Detailed Reporting
ASR/ACD per SIM, per Port, per allocation, per device
All SIM information can be exported


Call Flow


Main features

Easy and powerful web based management
Multi-criteria allocation rules by SIM card group
SIM travel simulation
Dynamic SIM swap
Prepaid SIM card management


SIM centralization

With the QuesCom SIM management solution, SIM cards are not located in GSM gateways but centralised in one place.
SIM management becomes quick and easy and SIM cards can be stored in a secure place.


Flexible SIM

Use as many SIM cards per port as you want without manual intervention and constraint - SIM cards are not anymore permanently attached to a given GSM port.
The QuesCom SIM Server can allocate any SIM on any GSM port according to user-defined rules. It then enables a smooth use of SIM cards across days and months and enables the use of different SIM cards profile during on -peak/off-peak hours.


SIM allocation

The SIM server has knowledge of available SIMs in the various SIM arrays. The SIM card to use is selected based on a set of advanced criteria such as current date and time, price plan, GSM provider. Once selected, it provides the gateway with useful information to access this SIM card. The gateway directly contacts the SIM array through TCP/IP to read the SIM information and register it on the GSM network. Periodically, the SIM Server checks GSM port status and then detects when a SIM card needs to be changed. Criteria to change SIMs are a combination of time, date, price plan limit, SIM validity. When one of these criteria matches, the SIM Server will associate another SIM to the gateway. When prepaid cards or monthly plans are running short of credit, SIM cards are automatically removed from routing. A new SIM card is then immediately allocated improving drastically your ASR (Answer Seizure Ratio) and taking full advantage of your GSM gateways.


Prepaid management

The SIM Server manages prepaid SIM cards. When SIM credit becomes low, SIM cards get stamped "to be recharged" and parked ready for "top-up".


Management and administration

An out-of-the-box web-based interface manages the SIM Server deployment. This interface allows the administration of the SIM cards including advanced features such as SIM array maintenance, and SIM tractability. This web interface has been designed to easily manage large numbers of SIMs. Filtering capabilities combined with SIM status provide a unique SIM tool management interface. In addition, they provide an overall view of all GSM gateways, ASR (Answer Seize Rates) and ACD (Average Call Duration) per gateway, SIM and port.



Download PDF Download brochure



A QuesCom GSM gateway reduces your telecom bill. Calls from fix phones to mobiles phones usually represent 35% to 55% of a company’s telecom bill. Easy to install, a GSM gateway automatically converts calls from fix phones to mobile phones into calls from mobile to mobile which are cheaper for they are carried through a unique telecom network: the GSM network. The cost of fix to mobile calls on average decreases from 35 to 55%. The gateway offers the enterprise additional features such as fax, SMS or Mobility.





A QuesCom GSM gateway is economically attractive from a monthly rate of 20 hour calls towards mobile phones. Check your phone bill! For instance, a company having 170 hours per month of calls towards mobile phones is charged 1 734 euros. The company can save about 42% on this bill (about 714 euros per month) by installing a QuesCom GSM gateway. In less than 6 months, the investment becomes profitable.




A possible reduction of rate “fix to mobile” will not put an end to GSM gateways. Indeed, in most cases, quick return on investment will be preserved by tariff preferences of fleet rates and original price of connection. Not only do QuesCom provide usual functionalities on GSM gateways and so cost reduction benefits, but also solutions such as:

Mobility: mobile phones are integrated within the company’s PBX infrastructure enabling features like sms/fax sending and receiving, mobile extension…

VoIP migration: you can use your gateway to smoothly migrate from an ISDN PBX to a VoIP solution.



In all European countries, no law forbids use of GSM gateways within the company’s environment for their own need.




The gateway has a unique modularity and makes the investment last longer.
Your usual telecom system is switching to IP?
        The QuesCom gateway “IP Native” is perfectly compatible with former ISDN standard PBX’s and with newest IP-PBX’s.
Your company is growing?
        The gateway’s resources can be upgraded with new hardware add-ons.
Your company is opening a new site?
        By adding a gateway, you can build a multi-site architecture which can be centrally managed.






Legacy PBX
ISDN integration, in passthrough on ISDN PRI links.


SIP integration.




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