Public Switching Systems and Solutions
DS200 is the public switching exchange of Karel Electronics Corporation that provides not only modular and reliable but also flexible, cost effective and future proof solutions.
The public switching concept; devised by Karel; offers comprehensive solutions to a multitude of requirements arising in connection with supplying sparsely populated areas with a telecommunications infrastructure. The concept provides not only for the aspect of perfect and cheap communication but also for special solutions.
Comprehensive concepts are required, as well as technology flexible enough to adapt to the requirements by tailor-made solutions. Allowing expansion and fulfillment of all demands at all times and under adapting country to modern and entirely digitalized conditions, Karel has developed a concept which enables the size of an exchange to be dimensioned economically to meet local demand as well as allowing effortless adaptation to increasing number and traffic.
Public Switching Systems
Karel's Public Switching Systems resemble ingenuity and expertise on providing flexible, cost effective, future proof solutions for telephone operators. Karel offers innovative applications for rural and metropolitan areas, such as bridging the digital divide in telecommunications.
System Structure
Trunk Interfaces
Subscriber Module Features
The public switching concept; devised by Karel; offers comprehensive solutions to a multitude of requirements arising in connection with supplying sparsely populated areas with a telecommunications infrastructure. The concept provides not only for the aspect of perfect and cheap communication but also for special solutions.
Comprehensive concepts are required, as well as technology flexible enough to adapt to the requirements by tailor-made solutions. Allowing expansion and fulfillment of all demands at all times and under adapting country to modern and entirely digitalized conditions, Karel has developed a concept which enables the size of an exchange to be dimensioned economically to meet local demand as well as allowing effortless adaptation to increasing number and traffic.
Public Switching SystemsKarel's Public Switching Systems resemble ingenuity and expertise on providing flexible, cost effective, future proof solutions for telephone operators. Karel offers innovative applications for rural and metropolitan areas, such as bridging the digital divide in telecommunications.
- Maximum port capacity: 32,000
- Maximum switching capacity: 8192 x 8192
- End exchange, Transit Exchange or Gateway applications
System Structure
- Transmission of internal signaling over IP. The system itself is designed to form a LAN
- Full redundancy support
- Different cabinets for different capacities. Small footprint for high capacities
- Modular system architecture. The system consists of Access Towers and Control & Switching Cabinet
- Access Towers have own switching unit for internal switching
- Access Towers can be installed as separate exchanges to ensure cost effectiveness in small capacities
System Software and CPU
- Linux Suse 10.1 O.S.
- PC-CPU functioning as the CPU of the system
- 19" rack type PC
- Pentium IV 2.4 GHz. Processor
- 60 GB. non-volatile memory
- 512 MB. volatile memory
- Upgradable for future requirements
Trunk Interfaces- Connection to all possible nodes in a network with following trunk interfaces:
- Ethernet: TCP/IP
- SS7: ITU-T No.7 compatible
- ISDN-PRI: Euro-ISDN compatible
- R2: MF compatible, DC loop and pulse signaling
- CAS 1B: 2 wire or 4 wire
- CAS 2B: Polar code
- CAS 3B: CAS mode DP, MFR1
- MF Shuttle: 30 ch. MFR1 transmission
- 1 VF: 30 ch. PCM transmission, 4 wire (2600 Hz.)
- Capable of bridging all trunk interfaces in a single system.
- No additional equipments (PCM, converter, etc.) are required for trunk connections. Provides connection of analog trunks to digital network without using PCM transmission equipments.
- Modular architecture for wide range of networking possibilities.
- SS7 module supports SSP (Service Switching Point) and STP (Signal Transfer Point) applications.
IP Connectivity
- Voice over IP Interface
- Remote operation and programing over IP (or SS7) network
- Alarm and monitoring system working on IP (or SS7) network
Operation and Maintenance
- Easy to use, Windows based operation, monitoring, programing, billing and alarm facilities that extensively covers all the needs of operators
- Alarm and monitoring system working on IP (or SS7) network
- Link breakdown
- Card breakdown
- Line Breakdown
- Buffer Full
- Redundant CPU in operation
- Remote operation and programing over IP network
- Billing center application with web interface
- Call traffic monitoring over IP network
- SS7 module supports SSP (Service Switching Point) and STP (Signal Transfer Point) applications.
Subscriber Module Features- Uses DU-SLIC technology
- Distant extension feeding (Loop resistance up to 2500 ohms)
- Automatic gain adjustment
- Automatic line testing (Manually or automatically at certain intervals)
- Short circuit, open circuit, leakage or excess voltage tests
- Brief or detailed (with the measured values) statistical reports of test results
- All extensions suitable for payphones
- Metering pulse generation (12/16 kHz.) or polarity reversal
- Extra built-in protection against excess voltage
Extension Features
- Last number autodial, redial
- CLIP / CLIR
- Malicious call trace
- 3-pty conference
- Call hold
- Call forwarding
- Phone lock
- Wake up service
- Do not disturb
- Ring test
- Additions are possible upon customer requirements
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