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Xcrypt’s Innovative CAM based CAS system

The Most cost-effective head-end solution for small operators

CAMCAS system, which is based on the scrambling CAM, is Xcrypt’s innovative solution for small local cable operators who use Transmodulators in their headend. CAMCAS system is the total Conditional Access System including headend scrambler, simple ECM/EMMG, SMS (Subscriber Management System). The Headend Scrambler and ECM/EMMG are implemented in a PCMCIA Module which is DVB-CI (EN 50221) compliant, and it can be used in Transmodulator or IRD which has CI slot. Xcrypt CAMCAS system is the most cost effective solution in the world for small operators, especially less than 100 services and up to 10K subscribers. CAMCAS system enables the distribution of the valuable contents through local independent operators in very economical way with very high level of security. It also fits to the contents delivery application such as DSNG (Digital Satellite News gathering) because of its high level of security and simplicity. CAMCAS system has been successfully deployed by small Cable Headends and Hospitality facilities in European countries and being expanded its installations.

Background

The small cable operators receive the contents from Satellite or Terrestrial services. Simplest way of digital cable service is just re-transmit the incoming signals. Because the digital cable signal is QAM, which is different from QPSK(from Satellite) or CODFM(from Terrestrial), there should be Transmodulator to change the modulation of digital signals. The Transmodulator receives digital signals from Satellite or Terrestrial and change it to the QAM signals to transmit through the cable network. If the incoming channel is scrambled, it should be descrambled before re-transmission. To descramble the incoming scrambled signals, transmodulator provides DVB-CI slot to use Common Interface Conditional Access Module, which can descramble the signals. Figure 2. shows this typical headend configuration of small cable operators. For the scrambled signals, there are Transmodulator which has DVB-CI slot, and descrambling professional CAM is inserted to each slot to descramble incoming signals. Professional descrambling CAM is special CAM which can descramble multiple services at the same time. Typically the Transmodulator is less expansive and easy to use than multiplexer which is used in big headend systems. Here is the reason why Xcrypt developed CAMCAS system. Xcrypt CAMCAS makes it possible to deploy the CAS system on Transmodulator environment. The CI slot of Transmodulator is to be used for Scrambling CAM to build complete headend system which provides encryption of contents and management on subscribers and services.

Operation of CAMCAS

The Scrambler CAM is inserted into the Transmodulator or IRD, and one Scrambler CAM can scramble upto 16 channels giving packaged information. There are 16 possible bouquets(tiers) and each channel can be a member of them. The configuration of the Scrambler CAM is done by configuration file which is generated by the product builder program. The Product Builder is part of SMS system and the configuration file is sent to the Scrambler CAM . To open scrambled channels, subscribers should use consumer CAM or STB with smartcard and the subscriber should be activated by SMS (Subscriber management System) which is part of CAMCAS system.


XcBuilder (Bouquet Builder)		XcSMS (Subscriber Management System)

Scalability by True Modular Design

Because the CAMCAS is based on scrambler CAM, just ‘adding CAM’ is the only thing to encrypt more services. One scrambler CAM can encrypt upto 16 services and two CAMs can handle upto 32 channels and so on. Start with only one Scrambler CAM for few premium channels, and then possible to add new Scrambling CAM as the services increasing.

Compatible Transmodulators

Televes, Kathrein, WISI, TONNA, Triax, WellAV, Astro