Coral Telecom DX2000XL, Руководство по программированию для пользователя

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User & Programming Manual
DX2000 XL – Hotel Version
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Line Card (LCS)
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 load on master CPU. It can connect a maximum of 8 analog instruments per card.
It has unique power-down circuit, which means if the instrument is on hook, the circuit does
not draw power. This is useful during power failure when the battery takes over, thereby
increasing the duration of battery operations. It has AGC (Automatic Gain Control), which is
useful during long distance calls, when the quality of voice goes down. The AGC increases
or decreases the gain to maintain a standard voice level. It has an internal 4 wire design to
avoid echo. LCS cards have feature of RF suppression & support loop resistance of 2400
ohms on 48volts line voltage.
LCS is of three types:
a. LCS-I This card is used to provide the connectivity of SLTs. It will extend DTMF CLI
on normal SLT extension provided CLI is supported on trunk port & DTD card is
installed. Extension should have a CLI instrument.
b. LLC-II This card will offer the LCS-1 facilities & message waiting facility on
extension. Message waiting lamp facility can be provided only with SL CPU. However
LCS-II can work as LCS-1 with CCPU.
c. LLC-III This card will offer the facilities of LCS-2 & additionally line reversal
extending on SLT. This card will extend the reversal with SL CPU & with CCPU also
(only on Hotel version)
Note- It is found that some CLI instruments are not supporting the CLI facility if the line
voltage is 24 Volt. Hence care must be taken while installing the system.
Analog Trunk Card (TCS)
It does not occupy any fixed position in the system and can be put in any slot except the PSU,
the CPU and the Tone card slot. This card has its own Intel 89C52 micro controller, which
minimizes load on the master CPU. It can connect a maximum of 8 P & T lines per card. It
has AGC (Automatic Gain Control), which is useful during long distance calls, when the
quality of voice goes down. The AGC increases or decreases the gain to maintain a standard
voice level.
Trunk ports will detect the reversal & DTMF CLI from the analog trunks. The feature `Call
progress tone detector – CPTD’ also is the part of the TCS card. 16 Khz detection also is
possible only with SL CPU.