Specifications

CONTENTS
2–3
EXPANSION B
This card has its own dedicated card slot in the
expansion cabinets and does not reduce the
number of available universal card slots. See
Figure 2–5.
The Expansion B card contains the following:
l HDLC connection for that expansion cabinet
l LED status indicator
2.4 INTERFACE CARDS
These cards provide the interface connections
for telephone lines and stations to the KSU and
expansion cabinets These cards fit into the
universal card slots to configure the system as
required. DCS interface cards are encased in
a static dissipative ABS plastic shell to protect
the PCB during handling (see Figure 2–6).
TRUNK A1
This card is a combination loop start line card
and miscellaneous interface card that contains
the following circuits:
l Two loop start C.O. lines with C.O. discon-
nect and Caller ID detection
l Two power failure transfer relays for the first
two C.O. lines connected to this card
l One internal chime music source
l One music input for BGM/MOH
l One page output for connection to an am-
plifier
l Two page zone control relays
l One common bell relay
l One keyset ring output for connection to an
amplifier
l One alarm detection sensor
NOTE: The alarm sensor will only operate when
the Trunk A1 card is installed in the KSU. This service is not available when the Trunk A1
card is installed in an expansion cabinet.
FIGURE 2–5
FIGURE 2–6