Toshiba strata CT Installation & Maintenance Manual page 208

Peripheral Installation
Installing the HESB Loud Speaker Amplification in Electronic
Telephones
1.
2.
3.
Note
4.
5.
6.
7.
H
8.
9.
C
Important!
Testing the Loud Speaker Amplification Option
1.
2.
3.
4.
Note
6-20
On the HESB TB1 terminal block: connect a jumper between terminals 6 and 7, and
connect another jumper between terminals 5 and 8
On the HESB TB2 terminal block, connect a jumper between terminals 4 and 5.
Install an HHEU PCB and HESC-65A (or HESC-65A) cable in the telephone per
Chapter 5 – Station Apparatus
HESB connections made in
jack instead of the TB1 terminal block.
Connect terminal 1 of the HESB TB1 terminal block to the red (+) wire of the HESC-65
cable using a modular block.
Connect terminal 2 of the HESB TB1 terminal block to the green (-) wire of the HESC-
65 cable using a modular block.
Connect terminal 3 of the HESB TB1 terminal block to pin 3 of the electronic
telephone's modular block (VOICE A).
Connect terminal 4 of the HESB TB1 terminal block to pin 4 of the electronic
telephone's modular block (VOICE B).
Connect the customer suppled 12VDC 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.
Plug the privided power cord into the power supply and to a 240VAC, 50Hz power
source.
Make sure the AC power is within the specified limits shown in Step 9. If AC voltage
G
is not within range, have a qualified electrician correct the problem.
Cut the EX-SP and HHEU straps on telephones and do not cut the OCA strap or
G
R607 on the HHEU (see
Test the AC input voltage. See Step 9, above.
Make an Exchange line or station call to the station configured for the loud speaker
amplification. Ringing will be heard over the HESB.
Use a small, slotted screwdriver to turn the volume control on the back of the HESB to
the desired level and adjust the ring volume control on the telephone.
If ringing is heard at the station, but not over the HESB, check the following while the
station is ringing:
N
Using a suitable voltmeter, measure voltage across terminals 1 (+) and 2 (-) of the
HESB TB1 terminal block. Voltage indication should be 4.5~5VDC.
Ringing stops once the call is manually answered. There should be NO voltage
potential across terminals 1 and 2.
(see Figure
before proceeding with Step 4 for more information..
Steps 4~7 can be made with the HESB VOICE modular
Chapter 5 – Station Apparatus
Strata CT I&M Manual October 2000
6-12).
for details).