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I n s t a l l a t i o n & P r o g r a m m i n g M a n u a l
72
Figure 4-11 Expansion / Option Card Mounting Locations on 212 system
0+2 / 1+2 / 2+2 2+2 B Expansion Cards
These expansion cards provide capacity to support two extra extensions with zero, one or two
optional PSTN lines. The 2+2 card is for use in the 208 system only. 2+2B card is for use in the 212
system only. These cards mount onto the Expansion Card slots 1 and 2. A maximum of two cards
can be mounted on the MBU.
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.
ISDN Cards
This optional card provides an interface to a single basic rate ISDN exchange line, plus two extra
extensions. The 206 system supports 1 basic rate ISDN line, while the 208 and 212 support up to 2
basic rate ISDN lines. Each ISDN card adds two exchange lines to the unit, using the two ISDN b
channels on a single basic rate ISDN connection. The system will be expanded as follows:
Added capacity
206 system
208 / 212 systems
+ ISDN card
+ ISDN card 1
+ ISDN card 2
Exchange lines
2 & 3
3 & 4
5 & 6
Extensions
17 & 18
21 & 22 (208)
25 & 26 (212)
23 & 24 (208)
27 & 28 (212)
212 system motherboard
CLI /Meter pulse detection Card
Expansion card 2
V24/FS K
card
MDF Connectors
Expansion card 1
Battery Back-up card
Auxiliary card
System
software on
flash EEPROM
CDR card