NEC Electra Elite IPK II System Hardware Manual page 514

Document Revision 3
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11 - 10
4. Insulate the end of the cable that needs to be shielded with
insulating tape.
Table 11-1 ADA-U Cable Connections
connections to ADA-U ADP terminals and describes the
specifications for the terminals.
Table 11-1 ADA-U Cable Connections
Terminal
Cables to Connect
Number
When warning tone is not being
sent from the recorder, connect
T1 wire pair input from tone
generator to T1:T2. The
warning tones from the
generator are sent to T1:T2 on a
T2
dedicated wire pair while the
speech path is sent from the
ADA-U on T3:T4 over a
separate wire pair to the
recorder.
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.
T5 Connect the bare end of the
control cable.
T6 Connect the shielded end of the
control cable.
Installing Electra Elite Optional Terminal Equipment
Electra Elite IPK II
provides a list of cable
Terminal Specifications
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
Input/Output Terminal:
Refer to dip switch settings
in Table 11-2 ADA-U Unit
Switch Settings.
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.
Provides common
connection for control cable.