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 Public Switching Systems
 Centralized Management
ALR200
Idea
Net-CM-PSS
Net-Console-PSS
 Field Proven Project
Before Karel
Unique Solution
Results of the Project
 
 
LAN Option for

LAN Option for
  
 
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  Public Switching Solutions
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.
General Information
Maximum port capacity: 32,000
Maximum switching capacity: 8192 x 8192
End exchange, Transit Exchange or Gateway applications
   
  GATEWAY
  TRANSIT
  END EXCHANGE

 
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
   

Access Towers for different 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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Last updated : 09.03.2009
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