NEC SL1000 - Power Failure Transfer; Figure 2-22 Extension Cabling

2. Insert the modular plugs of the extension line cords (2-wire/4-wire) into the extension modular
jacks on the KSU.
65
䂯
䂥
ST8 ST6 or ST7
T
L
R
HL
TR
ST6 or ST7
TRTR
H
Multiline
Telephone
DSS Console Doorphone External
Sensor Device
SLT
Modular Cable
(4-wire, Straight)
Modular Cable
(2-wire, Straight)
KTS, DSS
SLT
Doorphone
300 m (984.3 ft)
1,125 m (3,691 ft)
150 m (492.1 ft)
Wire Position for each Port Extension Port Position
ST1ST2ST8
ST6 or Doorphone/Sensor
T : Tip
R : Ring
H : High
L : Low
ST7 or Doorphone/Sensor
TR
LH
Modular
Plug
T: Tip
R: Ring
H: High
L: Low
Max cable length
(24AWG 0.5 mm)
Figure 2-22 Extension Cabling
While an Analog Telephone (port) is ringing or MW-lamp is flashing on an
Analog Phone (port), do not disconnect the phone from the port or connect
another type of the terminal to this port.
• DSS Console must be connected to the LAST PORT.
• Doorphone/External Sensor Device must be connected to the No. 6 or 7 PORT of each 408M-A1.
• The program setting is required when connecting a Doorphone/External Sensor Device.
1.6.5 Power Failure Transfer
1.6.5.1 General
In the event of AC power failure, the specified trunks are directly connected to the specified extension
ports as below. And SLT must be connected to the specified extension. The multiline telephone (4W)
does not work when connected to the specified extension port.
ISSUE 3.0
SL1000
Hardware Manual 2-17