DSS Eurocom 612, Инструкция по установке и программированию

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S e c t i o n 4 - I n s t a l l a t i o n
57
If power is inadvertently left connected while installing or removing any expansion cards
then before the telephone system is used it should be powered down. Whilst the cards will
not be damaged the telephone system is designed to detect these cards during a self-test at
power-up.
Keep all PCBs in their protective anti-static bags until they are installed in the Main Unit.
All PCBs that are not in protective bags should be handled by the card edges only.
Never lay an unprotected PCB on a carpeted surface.
Each card has it's own corresponding connectors on the main board, in the positions shown in
Figure 4-6 below.
Figure 4-6 Expansion / Optional PCB Mounting Location
0+2 / 1+2 / 2+2 Expansion Cards
These expansion cards provide capacity to support two extra extensions with zero, one or two
optional PSTN lines. These cards mount onto the Expansion Card slots 1 and 2. A maximum of two
PCBs can be mounted on the MBU to provide maximum system capacity of 6 + 12.
PSTN CO Line Ports:
The CO line ports will support DTMF and Pulse dialling. By default, if the extension uses pulse
dialling then the telephone system will use pulse dialling onto the exchange line. Likewise, if the
extension is DTMF then the exchange line signalling will also use DTMF. If the line is a DTMF line
then all speed-dialled numbers from the telephone system will be DTMF, even if the extensions are
pulse. The PSTN CO Line ports can be connected to a host PBX’s extension ports for analogue
networking purposes. Timed Loop Break line (Recall) signalling is provided to support carrier
network services.
Extension Ports:
These are analogue single line ports to support telephony devices.
UTP Cat-3 twisted pair wiring must be used to eliminate interference from other sources. Individual
cable-runs between the extension device and the MDF Connection Terminals are a mandatory
requirement. (Star-Wiring technique.)
V24
socket
Music on hold
external source
Telephone system motherboard
CLI /Meter pulse detection Card
Expansion card 2
System software on
socketed EPROM
V24 card
Fax / Voice Card
MDF Connectors
Expansion card 1
BBU connector
Optional 25Hz
ringer card