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INSTALLATION-WIRING DIAGRAMS
SECTION lOO-816208
MARCH1993
TABLE 8-B
STATION LOOP REQUIREMENTS
Device Description
Electronic4 telephone
HDSS console
Standard telephones,
voice mail,
auto attendant, etc.
Max Loop Resistance
(Including Device)
40 ohms
20 ohms
300 ohms
Max Distance from
KSU to Device
1000 ft. (303 m)
500 ft. (152 m)
Approx. 3000 ft. (909 m)
with 150 ohm device. See
manufacturer’s product
specifications for exact
resistance of device.
Number of
Wire Pairs’
2-pair. EKTs which
receive OCA calls
need 3-pair.
1 -pair
Digital telephone
FDCB3
DDSS console
PDIU-DI
PDIU-D12
40 ohms
40 ohms
40 ohms
1000 ft. (303 m)
1000 ft. (303 m)
1000 ft. (303 m)
1 -pair4
1 -pair4
Shares digital
telephone wire-pair.4
PDIU-DS
40 ohms
ADM
40 ohms
1000 ft. (303 m)
1000 ft. (303 m)
1 -pair4
Shares digital
telephone wire-pair.4
NOTES:
1. Use 24 A WG twisted pairs.
2. PESU circuits 3 and 4 are not used.
3. DDCB can connect only to Circuit 5 of the DK16 Base Unit or Circuit 1 of the PDKU or KCDU.
4. Two-pair, larger wire, or local telephone power supply is required to achieve maximum range,
see Table 8-D.
8-2