External Speaker Unit (Hesb) Options; Loud Ringing Bell Option - Toshiba STRATA DK14 Installation And Maintenance Manual

External Speaker Unit (HESB) Options

Strata DK systems provide three options utilizing an HESB:
o Loud Ringing Bell
o Amplified Speaker
o Talkback Amplified Speaker
System hardware requirements vary depending on the HESB option selected. See the following
installation procedures for the hardware requirements for each option.

Loud Ringing Bell Option

The loud ringing bell option enables the voice first or ringing signal tone to be amplified without
the use of other manufacturers' equipment. The voice first and signal tone can be amplified on all
electronic and digital telephones equipped with HHEU PCBs and HESB. (See Chapter 11 –
Station Apparatus.)
The HESB automatically turns Off once the ringing call or voice first has been manually answered
from the electronic or digital telephone. This turn-off feature prevents audio feedback problems.
Installing the HESB Loud Ringing Bell in Digital Telephones
1. Connect a jumper between terminals 2 and 10 on the HESB TB1 terminal block
12-11).
2. Connect a jumper between terminals 4 and 5 on the HESB TB2 terminal block.
3. Install an HHEU PCB and HESC-65A cable in the telephone per Chapter 11 – Station
Apparatus before proceeding with
HESB connections made in
Note
modular jack instead of the TB1 terminal block.
4. Connect terminal 1 of the HESB TB1 terminal block to the red (+) wire of the HESC-65A
using a modular block.
5. Connect terminal 2 of the HESB TB1 terminal block to the green (-) wire of the HESC-65A
using a modular block.
6. Connect terminal 8 of the HESB TB1 terminal block to the yellow (L2) wire of the HESC-65A
cable using a modular block.
7. Connect the HACU-120 power supply's +12V lead to terminal 1 of the HESB TB2 terminal
block, and connect the power supply's 0V lead to terminal 2.
8. Plug the provided power cord into the power supply and to a 115VAC ± 10VAC, 60Hz power
source.
Important! If AC voltage is not within range, have a qualified electrician correct the problem.
Strata DK I&M 6/00
Step 4.
Steps 4~6 can be accomplished using the HESB VOICE
Peripheral Installation
External Speaker Unit (HESB) Options
(Figure
12-19