Panasonic KX-TD500 Installation Manual page 41

RCOT Card (KX-T96183) Functions
Loop Start Central Office Trunk with Polarity Reversal Detection card (8 CO Lines/card)
1.
Loop start CO interface.
CPC detection, 1 DTMF driver.
With loop start, you seize a line by bridging through a resistance the tip and ring (both
wires) of your telephone line.
Polarity reversal detection.
2.
Power failure transfer (PFT) by each port.
Tip/Ring of CO are connected to a CO interface circuit, and directly to RCOT PFT modular.
When power failure occurs, CO Tip/ring leads are directly connected to SLT Tip/Ring leads,
but RCOT PFT modular and SLT PFT modular should be connected each other with
connection cord 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 an RCOT of a system is activated.
RCOT Card (KX-T96183) Operation
The LED indicator on the RCOT card lights when the system reset or RCOT local reset occurs.
E&M Card (KX-T96184) Functions
1.
E&M (Tie) Line Types.
Type 5 only.
2.
Transmission.
2-wire or 4-wire voice path (Programmable)
(Note) Maximum cablling distance of E&M line cord (twisted cable):22 AWG : Under 9.6
km
3.
Transmission levels.
2-wire voice path ...... -3 dB (transmit / receive)
4-wire voice path ...... -3dB normal (transmit / receive)
Programmable (-6dB, -3dB, 0dB, +3dB)
4.
Signalling.
DTMF or Pulse
5.
E lead.
Battery: -48 VDC, -20mA to ground (max.)
Sensitivity: 5 mA or 2000
6.
M lead.
Permitted current : 30mA (max.)
Permitted voltage: 100V (max.)
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.
System Outline
to ground (max.) (min.)
1.6 Specifications
41