User & Programming Manual
DX2000 XL – Hotel Version
20
CCPU has its own power supply that takes in 24 volt DC from the main power supply of the
system & generates its own operating v5 & -% volt.
CCPU contains digital switching matrix. It has its own RTC to maintain the system time.
The CCPU & XL CPU has one serial port & one parallel port. Serial port is used to integrate
the DX with computer for any CTI application (Refer DX CTI Manual) It also has a built-in
printer interface to connect a printer for generating reports of calls made from the PBX.
CCPU has tone card functionalities like DTMF dialer, external & internal hold on music,
paging port.
Tone Card
SL CPU requires external Tone card to support them for system working. It generates its own
+5 volts for its functionality from 28 volts DC that is available from the main PSU. The
Tone cad contains:
a) 3
sensors
b) 1 action ports
c) 2 paging ports
d) 1 external music port
e) Single DTMF dialer
Peripheral Cards
Digital Line Cards (DLC)
It is used to connect digital key phones and DSS instruments. Key phone & DSS are
connected to separate ports of the DLC card but can be configured to operate as one operator
console.
It does not occupy any fixed position in the system and can be put in any slot except the PSU,
CPU and the Tone card slot. This card has its own Intel 89C51 micro controller, which
minimizes the load on master CPU. The DLC are high-speed data transreceivers that provide
80 KBPS full duplex data communication over 26 AWG (American Wire Gauge-an unit of
thickness of wire) or thicker twisted pair upto 1000 meters. The DLC utilizes a 256 kilo baud
modified differential phase shift keying burst modulation technique for transmission to
minimize cross talk in ping pong protocol and also to provide noise immunity to Data and
Voice. It provides for full duplex synchronous 64 KBPS Voice/Data channel and two 8
KBPS signaling data channels over one 26 AWG wire pair, thus simultaneous power
distribution and duplex data communication can be obtained using a single twisted pair wire
Summary of Contents for DX2000XL
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