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Promax-ET-836 Analogue/Digital Telephony training system (ISDN)

Promax ET-836
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ET-836 Analogue / Digital Telephony training system (ISDN)
The ET-836 is intended for the learning of the theory and practising of the central commutation and interior telephony networks.
It incorporates a PABX exchange, internal telephone lines (analogue and RDSI), an external line simulator, tariff generator modules,
channel simulator, fault simulator and connection points for analogue and digital (ISDN) terminals. It can be connected via modem
and directly to a PC.