MCL nanoSwitch, Installation Manual

Page: 12 / 52

2-2
2
System Components nanoSwitch Installation Guide
2-3
2
nanoSwitch Installation Guide System Components
Processor Card (C4024)
The Processor Card incorporates the system’s RAM, solid-
state hard disk, master clock, RS-232C port, and watchdog
circuitry as well as the system PCM voice processing
and main microprocessor. The microprocessor is a 32bit
high speed CPU which receives and transmits signalling
information from/to the other PCBs, controls feature
activation and PCM time-slot interchange.
The processor contains 32MB of DRAM and 32MB of
solid-state hard disk, which contains the confi guration and
operating software.
The Processor card also provides announcements for voice
prompting and user greetings. The standard 64KBps PCM
signals are stored for high quality voice reproduction. Voice
Prompting is normally in English, but can be updated by
the user to any language or message.
On the card, there are connectors for an USB connection
to a PC or laptop.
Analogue Extension Card (C4030)
The Analogue Extension Card has 16 single
line analogue (POTS) telephone ports. The
card provides the appropriate A/D and D/A
conversions, on/off-hook detection and ring
generation.
A telephone can be connected up to 3000 metres
from the system using 0.34mm² (22AWG) wire.
The card provides each extension with
approximately -48V line bias and 70V 25Hz
ringing. The loop current is approximately
24mA.
With suitably equipped telephones, an
extension can have a message waiting light
illuminated using line reversal, or display caller
information.
The line interface modules are plugged into the
extension card so that they can be replaced easily
if damaged, for example by lightening.