EPABX Training System
Order Code: 23246294.2
Category: General Lab Equipment II
Its designed for the theoretical study, supported by exercises, concerning telephony using multiplex with PCMTDM coding Its equipped with all the functions of a telephone exchange used in a communication system on PSTN (Public Switched Telephone...
SPECIFICATION
- Its designed for the theoretical study, supported by exercises, concerning telephony using multiplex with PCMTDM coding
- Its equipped with all the functions of a telephone exchange used in a communication system on PSTN (Public Switched Telephone Network) linesTraining programs to be performed:- Basics of telephony
- Telephone and power, (Pulse/DTMF) dialling and communication signals- User interface (SLIC):
- B (Battery powered): Telephone set powered by the exchange
- O (Over voltage protection): Protection against over voltages from the line
- R (Ringing): Control of ringing current
- S (Supervision): Detection of off-hook handset and of multi-frequency dialling pulses or tones
- H (Hybrid): Conversion from 2 to 4 wires and vice versa
- T (Testing): Level of signals; characteristics of line- CODEC:- channel ?lter 300-3400 Hz in transmission and reception
- 64 kb/s PCM encoding/decoding- transmission and reception Time Slot assignment and frame insertion at 2048 kbps (standard E1)
- Simultaneous communication of more users:- analog multiplex: FDM and digital multiplex: PCM-TDM
- Digital switched matrix:- CEPT interface and HDB3 coding- Line interface and line signal conversion: unipolar-bipolar- Timing and exchange tonesTechnical Specification: - 2 telephone sets: PULSE/TONE dialling- Operating modes:- TDM E1 frame generation - 32 PCM channels- Digital exchange switching and on line with HDB3 coding- Line simulator and assessment of service quality- External loop on coaxial line- 4 user jacks for the connection of max. 4 users for PSTN Networks, including SLIC, CODEC, Digital Switch and Line Interface- Display of transmission and reception time slots and frames
- Artificial line simulator with controls of attenuation and noise generator- PC-interfaceable control microprocessor- Synchronization system for displaying time slots on oscilloscope- LEDs of state indication:- Signalling: Clock Loss, BER, Frame Sync, Multi-Frame Sync- Incoming calls and switch hook detection- DTMF binary code and Line signaling
- 1 interface for connection with supervision PC- 1 supervision software for programming exchange should be supplied
- Standard accessories with printed user manualPower Supply Unit:- LED for signaling voltage availability
- Rectified and filtered voltage, protected by fuse
- Electronically protected against short circuits and overloads
- Output S1: +30Vcc – 4A
- Output S2: 24Vca – 4A
- Output S3: +5Vcc – 2A
- Output S4: +12Vcc - 2A, -12Vcc – 1A
- Output S5: 1.3Vcc - 24Vcc, 1A- Output ON DIN Connector: 24Vca - 0 - 24Vca, 0.5A
- Power source: 220~230V AC, 50Hz, 1 Phase-
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