Panasonic KX-TD500 System Reference Manual page 40

5.00 TSW Card
Functions
(1) Time switch.
Capability of switching voice is 768ch x
768ch.
(2) Generation of call progress tones.
Call progress tones are dial tone, busy tone,
reorder tone and ringback tone.
(3) Conference circuit.
TSW card has 3 party x 8 conference's
circuits.
For CO-CO speech amp., AGC card can be
inserted to a free slot of basic or expansion
shelf.
(4) Paging interface.
TSW card has 2 pre-amp. circuits for paging.
In order to adjust volume, each amp circuit is
equipped with a knob.
(5) Music-in interface.
TSW card has 2 interface circuits for music on
hold or BGM.
Operation
(1) A knob for adjusting volume of external
paging is turned with a screw driver from front
of TSW card.
(2) LED indicator on the TSW card lights when
system reset or TSW local reset occurs.
6.00 Power Unit
Functions
(1) Power supply (+5.9, ±15, GND) for a shelf.
(2) External battery interface. (±12V)
Battery power (±12V) is input from a battery
interface unit in basic shelf with a 4 wire
cable.
(3) Power failure detection.
A circuit in power unit detects power failures
of +5.9VDC, ±15VDC, 200~240VAC, and 3
power alarm signals is sent to CPU card as
DC alarm, AC alarm and Heat alarm.
(4) Generation of bell signal. (
(5) Generation of system clocks.
System clocks are 4.096MHz, 2.048MHz
(PCM clock), 8kHz (PCM frame clock).
1-E-4
20
/ Hz, 75Vrms)
25