Peripheral Installation
External Speaker Unit (HESB) Options
9-20 Strata CTX I&M 10/02
Figure 9-21 Wiring the Telephone External Ringer with HESB Interface
P1
BHEU
(-)
(+)
(-)
(L2)
(+)
5606
25-Pair
Cable
Jacketed
Twisted Pair
24 AWG
HACU-120
115VAC to
12 VDC
115 VAC
Tip
Ring
PT
PR
Station Cabling
MDF
66 Block
Power
Supply
Modular
DKT2000 or 3000-series
Station
HESC-65A Cable to P601
of HHEU or to P1 of BHEU
Green
Yellow
Red
+
P601
HHEU
(V.3 or .4)
OCA
Strap
R607
Do Not
Cut
6 5 4 3 2 1
Not Used
6 5 4 3 2 1
Not Used
Voice Door Phone
12345
TB2
12V 0V
12V 0V
24 AWG
Jacketed
Twisted Pair
from
Digital
Telephone
to HESB
Jumpers
GN
Y
BL
R
BK
W
GN
Y
BL
R
BK
W
(L2)
654321
123456
654321
123456
TB1
(L2)
Jumper Wires:
TB1
2-10
TB2
4-5
HESB (Rear View)
Internal Wiring:
Volume Control
TBI
1
2
3
4
Voice
6
1
3
4
(+)
(-)
12345678910
BDKU,BDKS,
PDKU or
RDSU
± 10 VAC
maximum
Install BHEU, HHEU Circuit (V.3 or .4) or HHEU2 card
into base of DKT per BHEU or HHEU installation
instructions in this chapter.
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