Panasonic KX-TD500 Installation Manual page 38

1.6 Specifications
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 DPT (KX-T7235, KX-T7436) with OHCA feature.
The interface for DPT (KX-T7235, KX-T7436) with OHCA feature 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 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.
DHLC (Digital Hybrid Line Circuit) Card (KX-TD50170) Operation
1.
The LED indicator on the DHLC card lights when the system resets or DHLC local reset
occurs.
DLC (Digital Proprietary Line Circuit) Card (KX-TD50172) Functions
1.
DPT and DSS console interface (16 circuits/card).
Maximum loop resistance : 40 ohms
Power supply : +15V (supplied through the data line)
2.
DPT (KX-T7235, KX-T7436) interface with OHCA feature.
When a DPT with OHCA feature is connected to a port, a DOHCA card should be mounted
on the TSW card.
DLC (Digital Proprietary Line Circuit) Card (KX-TD50172) Operation
1.
The LED indicator on the DLC card lights when the system resets or DLC local reset
occurs.
ESLC (Enlarged Single Line Telephone Circuit with Message Waiting) Card (16
extensions/card) (KX-TD50175) Functions
1.
Standard SLT interface.
Power supply: +30V (with current limitation circuit)
4 DTMF receivers, and dial pulse detectors.
2.
Interface for power failure transfer by ports 1 to 8.
When a power failure occurs, SLT Tip/Ring are led by a PFT relay, but SLT PFT modular
and ELCOT modular should be connected to each other in advance.
3.
Interface for diagnostic transfer (DT) 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.
38
System Outline