Panasonic KX-TD500 Installation Manual page 37

TSW Card Operation
1.
A knob for adjusting volume of external paging is turned with a screwdriver from front of
TSW card.
2.
The LED indicator on the TSW card lights when system resets or TSW local reset occurs.
HLC Card (KX-T96170) Functions
Hybrid Line Circuit card is for APT, DSS console and SLT. (8 extensions/card)
1.
Standard SLT interface. SLT interface is quite the same as that of SLC card.
2.
APT and DSS console interface. APT and DSS console interface is quite the same as that
of PLC card.
Note
DSS Consoles KX-T7440 and KX-T7441 can be connected to this card.
In this case, however, ANSWER and RELEASE buttons on the KX-T7441 do not function.
3.
Interface for OHCA feature with APT (KX-T7130).
This is quite the same as that of PLC.
4.
Power failure transfer by each port. (when using SLT)
Power failure transfer is quite the same as that of SLC card.
5.
Diagnostic transfer by each port. Diagnostic transfer is quite the same as that of SLC card.
HLC Card (KX-T96170) Operation
LED indicator on the HLC card lights when the system reset or HLC local reset occurs.
PLC Card (KX-T96172) Functions
Proprietary Line Circuit card (8 APT extensions / card)
1.
APT and DSS console interface. (8 circuits / card)
Maximum loop resistance : 40 ohms
Power supply 1 : +30 V (supplied through speech path, and with current limitation circuit).
Power supply 2 : +15 V (supplied through the data line).
Note
DSS Consoles KX-T7440 and KX-T7441 can be connected to this card.
In this case, however, ANSWER and RELEASE buttons on the KX-T7441 do not function.
2.
Interface for OHCA feature with APT (KX-T7130).
When an APT with OHCA feature is connected to a port, an OHCA piggyback card (KX-
T96136) should be mounted on its interface circuit.
PLC Card (KX-T96172) Operation
The LED indicator on the PLC card lights when the system resets or PLC local reset occurs.
SLC Card (KX-T96174) Functions
Single Line Telephone Circuit card
System Outline
1.6 Specifications
37