Toshiba Strata DK 280 Installation Manual page 73

Table 2-2
Loop Requirements
Device
Interface PCB
Description
Digital
PDKU (Ckts 1
telephone
or
RDSU (Ckts 5
DDSS console PDKU (ckt 8)
Attendant
RATU (Ckts 1
console
PDKU (Ckts 1
or
or
RDSU (Ckts 5
PDKU (ckts 1
RDSU (ckts 5
PDKU (ckts 1
ADM
RDSU (ckts 5
PDKU or
DDCB
RDSU (ckt 5)
PEKU (ckt 5)
HDCB or
HDSS consoles PEKU (ckts 7 & 8)
Standard
RSTU (ckts 1
telephones,
voice mail, PSTU (Ckts 1
auto attendant,
or
etc.
PEKU or PESU
RATU (Ckts 1
Notes:
WG twisted pairs.
2. PESU circuits 3 and 4 are not used.
3. Two-pair wire or an optional telephone power supply is required to achieve maximum range,
4. 300 ohms for PSTU/PESU: 600 ohms for RSTU, RDSU/RSTS/RSTU2 without R48S option, and 1200 ohms for RSTU or
RDSU equipped with an optional 1348s.
January 1996
Max Loop Resistance
(Including Device)
-
8)
40 ohms
-
8)
40 ohms
-
40 ohms
4)
-
8)
40 ohms
-
8)
-
8) or
40 ohms
-
8)
-
8) or
-
40 ohms
8)
40 ohms
40 ohms
20 ohms
-
8)
-
300 ohms
4)
600 ohms
8)
1,200 ohms
40 ohms
-
40 ohms
4)
Max Distance from
KSU
to Device
1000 ft. (303 m)
1000 ft. (303 m)
1000 ft. (303 m)
I
1000 ft. (303 m)
m)
1000 ft. (303
1000 ft. (303 m)
1000 ft. (303 m)
500 ft. (1 52 m)
300 ohms, Approx.
3000 ft. (909 m)
600 ohms, Approx.
9000 ft. (2,727 m)
1200 ohms, Approx.
21,000 ft. (6,363 m)
(with 150 ohm device.
See manufacturer's
product specifications
of
for exact resistance
device).
(303 m)
ft.
Number of
Wire Pairs'
1 -pair
2-pair
Shares digital
telephone
wire-pair?
1 -pair
Shares digital
telephone
1 -pair
2-pair
2-pair
OCA Stations
need 3-pair.
2-5