NEC Electra Elite 192, Hardware Manual

Page: 292 / 369

Issue 6 Electra Elite
7 - 10 Installing Optional Equipment
4. Insulate the end of the cable that needs to be
shielded with insulating tape.
Table 7-1 ADA-U Cable Connections provides a list
of cable connections to ADA-U ADP terminals and
describes the specifications for the terminals.
Table 7-1 ADA-U Cable Connectio ns
Terminal
Number
Cables to Connect Terminal Specifications
T1
When warning tone is not being sent from
the recorder, connect wire pair input from
tone generator to T1:T2. The warning
tones from the generator are sent to T1:T2
on a dedicated wire pair while the speech
path is sent from the ADA-U on T3:T4 over
a separate wire pair to the recorder. Input Terminal: T1 and T2 are enabled for tone
generating device when switches
SW1-3 and SW1- 4 are OFF.
(When switches SW1- 3 and SW1-4 are ON, a
humming sound may be recorded due to impedance
mismatch.)
Input Impedance on T1 and T2: 100K
Ω
Input Level on T1 and T2: –15 dB ~ 40 dB
T2
T3:T4
Connect recorder device wire pair speech
input to T3:T4.
When the recorder used supplies a
warning tone, this tone may also be sent
over the T3:T4 wire pair back to the
terminal. Input/Output Terminal:
Refer to dip switch settings in
Table 7-2 ADA-U Unit
Switch Settings .
T5
Connect the bare end of the control cable. When a Multiline Terminal is idle, this contact is
closed. When the Multiline Terminal goes off-hook
(using the handset, headset, or speakerphone), this
contact is open.
When recorder owner manual specifies start on
open circuit, connect T5 and T6.
T6
Connect the shielded end of the control
cable. Provides common connection for control cable.
T7
Connect the bare end of the control cable. When the Multiline Terminal is idle, this contact is
open. When the Multiline Terminal is busy (using the
handset, headset, or speakerphone), this contact is
closed.
When recorder owner manual specifies start on
closed circuit, connect T6 and T7.
T8
Unused
T9