Panasonic KX-TD500 Installation Manual page 44

System Outline
DHLC Card (KX-TD50170)
1.
Standard SLT interface.
Power supply: +30 V (with current limitation circuit).
2 DTMF receivers, dial pulse detector.
2.
Interface for APT, DPT, DSS Console and VPS (DPT).
The interface for the APT, DPT, DSS Console and VPS (DPT) is similar to the DLC card.
3.
Interface for OHCA feature with APT (KX-T7130).
The OHCA feature with APT (KX-T7130) is available without any optional cards.
4.
Interface for OHCA feature with DPTs (KX-T7235, KX-T7436).
The interface for OHCA feature with DPTs (KX-T7235, KX-T7436) is similar to the DLC
card.
5.
Interface for power failure transfer by each port (when using SLT).
When a power failure occurs, SLT Tip/Ring are led by a PFT relay, but SLT PFT modular
and LCOT/GCOT/ELCOT modular should be connected to each other in advance.
6.
Interface for Diagnostic Transfer by each port.
Diagnostic relay is placed in Tip/Ring of each port. During diagnostic test, only one
diagnostic relay in the SLT of a system is activated.
7.
There is a limit of 8 VPS (DPT) ports per card.
DHLC Card (KX-TD50170) Operation
1.
The LED indicator on the DHLC card lights when the system reset or DHLC local reset
occurs.
DLC Card (KX-TD50172) Functions
1.
Interface for DPT, DSS Console and VPS (DPT) (16 circuits/card).
Maximum loop resistance: 40 ohms
Power supply: +15 V (supplied through the data line)
2.
Interface for OHCA feature with DPTs (KX-T7235, KX-T7436).
When a DPT with OHCA feature is connected to a port, a DOHCA card should be mounted
on the TSW card.
3.
There is a limit of 8 VPS (DPT) ports per card.
DLC Card (KX-TD50172) Operation
1.
The LED indicator on the DLC card lights when the system reset or DLC local reset occurs.
For a DPT, APT, DSS Console, VPS (DPT) and SLT. (8 extensions or 16 extensions with XDP/card. Please refer to Section
*1
"2.4.13 Extra Device Port (XDP) Connection" for XDP.)
44
Functions
*1
Installation Manual