Panasonic KX-TD500 Installation Manual page 46
Digital super hybrid system
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Also See for KX-TD500:
- System reference manual (1574 pages) ,
- User manual (554 pages) ,
- Features manual (398 pages)
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System Outline
GCOT Card (KX-T96181) Functions
Ground Start Central Office Trunk card (8 CO Lines/card)
1.
Ground start CO interface.
CPC detection, 1 DTMF generator.
A way of signaling on subscriber trunks in which one side of the two wire trunk (typically
the "Ring" conductor of the Tip and Ring) is momentarily grounded to get dial tone.
2.
Power Failure Transfer (PFT) by each port.
Tip/Ring of CO are connected to a CO interface circuit, and directly to GCOT PFT modular.
When power failure occurs, CO Tip/Ring leads are directly connected to SLT Tip/Ring
leads, but GCOT PFT modular and SLT PFT modular should be connected each other with
connection cords in advance.
3.
Diagnostic Transfer (DT) by each port.
A diagnostic relay is placed in Tip/Ring of each port. During diagnostic test, only one
diagnostic relay in a GCOT of a system is activated.
GCOT Card (KX-T96181) Operation
The LED indicator on the GCOT card lights when the system reset or GCOT local reset occurs.
DID Card (KX-T96182) Functions
Direct Inward Dialing card
Wink start/immediate start DID interface.
(4 circuits/card)
45 V used in circuits is originated from DC-DC converter on DID card.
The DID card will receive pulse signals only.
DID Card (KX-T96182) Operation
The LED indicator on the DID card lights when the system reset or DID local reset occurs.
T1 Digital Trunk Card (KX-T96187) Functions
T1 interface. (1 circuit/card)
T1 is a digital transmission link with a capacity of 1.544 Mbps.
T1 can carry 24 voice conversations.
Frame Format :
Line Coding
Channel Type :
Signaling
(DTMF: 24 receivers and 6 generators)
46
D4/ESF
:
AMI/B8ZS
LCO/GCO/DID/OPX/TIE (E&M)
:
Pulse/DTMF
Installation Manual
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Troubleshooting
