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INSTALLATION-WIRING DIAGRAMS
SECTION 100-816-208
MARCH 1993
TABLE 8-D
DIGITAL TELEPHDNE/DIU/DDSS CDNSDLE/ADM/LDDP LIMITS
QPSU/KPSU
Maximum line length (24 AWG)
or
I 1 Pair 131~s
MODE
!
Battery Backup’
!
I
1 Pair 2 Pair external power’
I I
DKT Ringing
(Volume Max)
QPSWKPSU
Battery Backup
1000 ft (303 m) 1000 ft (303 m) 1000 ft (303 m)
675 ft (204 m) 1000 ft (303 m) 1000 ft (303 m)
DKT with
DVSU (OCA)
QPSWKPSU
Battery Backup
1000 ft (303 m) 1000 ft (303 m) 1000 ft (303 m)
495 ft (150 m) 1000 ft (303 m) 1000 ft (303 m)
DKT with HHEU
I I I
I
I
QPSU/KPSU 1 1000 ft (303 m) 1000 ft (303 m)
1000 ft (303 m)
“I
Carbon Handset
Battery Backup 330 ft (100 m) 1 1000 ft (303 m) 1 1000 ft (303 m)
DKT with PDIU-DI/
PDIU-D12
QPSWKPSU
495 ft (150 m) 1000 ft (303 m)
1000 ft (303 m)
PDIU-DS
I
Batter-v Backup
I
165 ft (50 m) 1 675 ft (200 m) 1 1000 ft (303 ml
QPSWKPSU
Battery Backup
I
1000 ft (303 m)
1000 ft (303 m) 1000 ft (303 m)
675 ft (204 m) 1000 ft (303 m) 1000 ft (303 m)
DKT with HHEU
and PDIU-DI/PDIU-D12
QPSWKPSU
Battery Backup
495 ft (150 m) 1000 ft (303 m) 1000 ft (303 m)
33ft(lOm) 330ft(lOOm) lOOOft(303m)
DDSS2060A
QPSWKPSU
Battery Backup
QPSWKPSU
1000 ft (303 m) 1000 ft (303 m) 1000 ft (303 rn:
500 ft (151 m)
1000 ft (303 m) 1000 ft (303 ml
1000 ft (303 m) 1000 ft (303 m) 1000 ft (303 m’
DDCB
Battery Backup 500 ft (151 m) 1000 ft (303 m) 1000 ft (303 m:
DKT with DVSU
and HHEU
QPSWKPSU
Battery Backup
1000 ft (303 m) 1000 ft (303 m) 1000 ft (303 rn:
165 ft (50 m) 1000 ft (303 m)
1000 ft (303 m’
DKT with ADM
QPSLVKPSU
Battery Backup
675 ft (204 m) 1000 ft (303 m) 1000 ft (303 m
165 ft (50 m) 1000 ft (303 m) 1000 ft (303 m)
NOTES:
1. Battery backup applies to instances when the system is being powered by batteries exclusively.
2. Digital telephones and other digital devices can operate at maximum lengths with two pair wiring or an external
power source.
3. See Figure 8-28 for external power wiring.
4. Digital cable runs must not have the following:
l
Cable splits (single or double)
l
Cable bridges (of any length)
l
High resistance or faulty cable splices
8-4