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NOTE:
Ringing stops once the call is manually an-
swered. There shouldbe NO voltagepotential
across terminals I and 2.
b) If voltage is not as specified during ring-
ing, check that the electronic telephone
wiring connections to the HESB have
been made properly (wires to terminals 1
and 2 of the HESBTBI terminal block may
have been reversed).
5.23 Amplified Speaker Installation. Install the
HESB Amplified Speaker option in accordance
with
1)
the following steps (refer to Figure 8-l 2):
Connect a jumper between terminals 1 and 2
of the HESB TBI terminal block.
2)
Connect a jumper between terminals 6 and 7
of the HESB TBI terminal block.
3)
Connect a jumper between terminals 5 and 8
of the HESB TBI terminal block.
4)
Connect a jumper between terminals 3 and 4
of the HESB TB2 terminal block.
5)
Connect a jumper between terminals 5 and 6
of the HESB TB2 terminal block.
64
Connect the PIOU or PEPU 600-ohm page
output (pins 13 and 38) to terminals 3 and 4 of
the HESB TBI terminal block.
6B)
Connect the PIOUS 600-ohm page output
(SPT and SPR) to terminals 3
and 4
of the
HESB TBI terminal block.
7)
Connect the power supply’s +12V lead to ter-
minal 1 of the HESB TB2 terminal block, and
connect the OV lead to terminal 2.
8)
Plug the provided power cord into the power
supply and to a 117VAC, 60Hz power source.
9)
Set the PIOU or PEPU SW4 switch to the SPO
position.
5.24 Amplified Speaker Test. Test the amplified
speaker installation in accordance with the follow-
ing steps:
INSTALLATION-PERIPHERALS
SECTION 200-096-208
FEBRUARY1991
1) Make an external page.
l
Page should be heard over the HESB.
.
2) Adjust the HESBvolume control to the desired
level.
5.25 Talkback Amplified Speaker Installation.
Install the HESB Talkback Amplified Speaker op-
tion in accordance with the following steps (refer to
Figure 8-13):
1) Connect a jumper between terminals 1 and 2
of the HESB TBI terminal block.
2) Connect a jumper between terminals 3 and 4
of the HESB TB2 terminal block.
3) Connect a jumper between terminals 5 and 6
of the HESB TB2 terminal block.
NOTE:
HESB connections made in steps 4 w 7 may
be accomplished using the HESB VOICE and
door phone modular jack instead of the TBI
terminal block.
4)
5)
6)
7)
84
84
9)
10)
Connect terminal 7 of the HESB TBI terminal
block to pin Ll of the MDFB.
Connect terminal 8 of the HESB TBI terminal
block to pin L2 of the MDFB.
Connect terminal 9 of the HESB TBI terminal
block to pin 1 of the MDFB.
Connect terminal 10 of the HESB TBI termi-
nal block to pin 2 of the MDFB.
Connect the PIOU or PEPU 600-ohm page
output (pins 13 and 38) to terminals 3 and 4 of
the HESB TBI terminal block.
Connect the PIOUS 600-ohm
(SPT and SPR) to terminals 3
HESB TBI terminal block.
page output
and 4 of the
Set the PIOU or PEPU SW4 switch to the SPO
position.
Connect the HACU-1,20’s +I 2V lead to termi-
nal 1 of the HESB TB2 terminal block, and
connect the OV lead to terminal 2.
8-9